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EK-RP04-IN-001

March 1975

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Document:	RP04 Disk Drive Installation Manual
Order Number:	EK-RP04-IN
Revision:	001
Pages:	78
Original Filename:

OCR Text

RP0O4

disk drive
installatiION

Manua

d [e] tal equiipmen L corporat IoN - maynard, massachusetts

RPO4

disk drive

installation manual

EK-RP04-IN-001

digital equipment corporation - maynard. massachusetts

1st Edition, March 1975

The material in this manual is for informational
purposes and is subject to change without notice.
Digital Equipment Corporation assumes no respon-

sibility for any errors which may appear in this
manual.

Printed in U.S.A.

The following are trademarks of Digital Equipment
Corporation, Maynard, Massachusetts:
DEC

PDP

FLIP CHIP

FOCAL

DIGITAL

COMPUTER LAB

CONTENTS
Page

CHAPTER 1

GENERAL INFORMATION

1.1

INTRODUCTION

1.2

MANUAL PURPOSE AND ORGANIZATION

. . . . .

1.2.1

Chapter Contents

1.2.2

Related Documentation

This

manual

and

the following documents comprise a

complete documentation package for the RPO4 Disk Drive:

RJP04 Disk System Maintenance Manual (DEC-11HRJPA-A-D)

RP04 Device Customer Print Set (RP04-0 PRINT

SET)
RP04

|
Device

Control

Logic Maintenance

Manual

(DEC-00-HRP4M-A-D)
Figure 1-3

DCL Portion of RP04

RH10

Massbus

Controller

Maintenance - Manual

(A-MN-RH10-0-MAN1)
1.2

MANUAL PURPOSE AND ORGANIZATION

1.2.3

Option Designations

This manual provides information on installing the RP04

The

single-access

Disk Drive into a computer system. To accomplish this

designated as the RP04-AA (60 Hz) or RP04-AB (50 Hz);

version

the

RP04

Disk | Drive

purpose, the manual is organized into eight chapters, and is

the

supported by the related documents identified in Paragraph

(60 Hz) or RP04-BB (50 Hz). The data pack used with the

1.2.2.

RP04 is designated as the RP04-P.

1-2

dual-access

version

designated

the

RP04-BA

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_ L |

1.3

SPECIFICATIONS SUMMARY

Table 1-1
RP04 Specifications Summary
Main Specifications

Storage medium

RP04-P Disk pack (3336 type)

Capacity/pack

43,980,288 16-bit or 39,982,088 18-bit words

Data transfer speed

2.48 us/16-bit word

2.79 us/18-bit word
Time for 1/2 revolution

8.3 ms

Disk rotation speed

3600 RPM

Drives/control, max

Track Positioning Time
One cylinder seek

7 ms

Average seek

28 ms

Maximum seek

50 ms (nominal)

Data Organization

Surfaces/pack

Tracks/surface

411

Sectors/track

22 (16-bit format) or 20 (18-bit format)

Words/sector

256

Bits/words

~ Recording method
Recording density

16 bits or 18 bits (two formats)
Modified frequency modulation (MFM)

4040 bits/inch, max

Mechanical

Mounting

1 free-standing unit

Size

40’ HX 31”W X 327D

Weight

600 Ibs

Cables

Control-to-drive

25 ft standard, 40 ft optional

(also 15 ft optional — DECsystem-10 only)
Drive-to-drive

2 ft standard

All cables, total

60 ft max

Power

Frequency

60 Hz+1%

50 Hz+1%

Phasing

3-phase

3-phase wye

3-phase delta

Voltage

208/230+£10%

380/400/415+10%

220/230/240+10%

Starting current (10 ms max)

30 A/phase

16 A/phase

26 A/phase

Running current

Drive

8.2 A/phase @208 Vac 4.3 A/phase @400 Vac

DCL

2.5 A @208 Vac (line-to-line)

Current for control

22A@+5V

Power factor

0.7

Power Loss (ac), duration

4 ms max.

Heat dissipation

2100 W (7000 Btu/hr)

1.5A@-15V

1-4

7.1 A/phase @240 Vac

CHAPTER 2

SITE PREPARATION

2.1

SPACE

Provision should be made for service clearances of 28 in.

(71 cm) at the front and rear of the RP04, and 20 in.
(51 cm) at either side of a drive string (Figures 2-1 and 2-2).
Space should also be made available in the system environment

for

storage of disk packs, each of which has a

diameter of approximately 15 in. (38 cm) when covered,
and a height of approximately 7 in. (18 cm) to the handle
W
WL

for each pack.
2.2

CABLING

of the top assembly. Disk packs should never be stacked on
top of one another; a designated shelf area is recommended

35-1/2"

No more than two RP04 Disk Drives should be supplied

from one ac power source. (Refer to Paragraph 4.2.2, step
NNWW\
ANN\
W\
\W
\\\

5.) The ac power cable used to connect the drive to the
facility power source must not exceed 25 ft (7.6 m) in
length.
maximum Massbus interface cable length available

The

(round cable) is 40 ft (12.2 m); thus, the first RPO4 must

CP-1354

be mounted no more than that distance from the con-

Figure 2-1

troller. Multiple RPO4s installed in the *“string” configura-

RPO04 Service Clearances (Front)

tion (side-by-side) will be connected by the standard 2-ft

(61 cm) cable provided with each RP04. An optional 10-ft
(3 m) cable can be provided for those situations where the
string

configuration

cannot

utilized.

The

Receptacles that will accept the 120 V/208 V 60 Hz plugs

aggregate

length of all external cables must not exceed 60 ft (18.3 m)

are

per controller, regardless of the configuration selected.

(L21-20R),

designated

variously

Hubbell

DEC

(12-11210), NEMA

(2510),

and

Bryant

(72120-FR);

receptacles that will accept 240 V/416 V 50 Hz plugs bear a
2.3

DEC designation (12-11259), but no NEMA or manufac-

POWER REQUIREMENTS

Those RP04 Disk Drives designed for use in the domestic

turers’

market operate on 208 V, 3-phase, 60 Hz power (standard)

breakers are also necessary.

numbers

are

presently

available.

20 A

circuit

or 230V, 3-phase, 60 Hz power (convertible, per Paragraph
4.5). Those RP04 Disk Drives designed to be used in the
on either 380V, 3-phase,

Digital Equipment Corporation should be notified well in

with 400V and 415V

advance of shipment regarding the input power require-

optionally available or 230V, 3-phase, 50 Hz delta power

ments so that the kits necessary for conversion to available

(standard)

facility power can be available at the time of installation.

international

market operate

50Hz

power

wye

(standard)

with 220V and 240V optionally available.

2-1

CP-1462

Figure 2-2

2.4

RP04 Service Clearances (Rear)

FLOOR LOADING

the requirements of the individual installation site may be

The weight of the RP04 (600 1bs/272kg) alone is not
sufficient to place unusual stress on most office building or

considered when the unit is packed for shipment.
False flooring should not be necessary if the RP04s in the

industrial plant floors. However, the added weight should

system

be considered in relation to the weight of the existing

are

computer system and possible future expansion.

installed

side-by-side

the

string

are just long enough to be run inside the drive cabinets to

connect

2.5

configuration, as the 2-foot cables provided with the units
the

units;

however,

if geographical

other

considerations necessitate some other configuration, or if
INSTALLATION CONSTRAINTS

the first RPO4 in the string configuration is not adjacent to

The route the equipment will travel from the receiving area

the controller, false flooring may be required to avoid

to the installation site should be studied in advance to
ensure

problem-free

delivery.

Among the

factors

exposed cables.

to be

taken into consideration are the height and location of

2.6

The RP04 Disk Drive presents no unusual additional fire or

doors,

the

size,

capacity,

and

availability

FIRE AND SAFETY PRECAUTIONS

elevators, the number and size of the aisles and doors en

safety

route, and any restrictions, such as bends or obstructions,

should be carefully checked, however, to ensure that the

hazards to an existing computer system. Wiring

in the hallways. Any constraints should be reported to

capacity

Digital Equipment Corporation as soon as possible so that

contemplated expansion.

2-2

adequate

for

the added load and for any

CHAPTER 3
ENVIRONMENTAL CONSIDERATIONS

3.1

Absolute filter (Figure 3-1). The system is designed to

GENERAL

The RP04 Disk Drive is capable of efficient operation even

supply clean air for:

in marginal environments. However, the parameters of the
operating environment must be determined by the most

Disk temperature control

restrictive facets of the system, in this case the disk packs.

Pressurization of the shroud area and the electro3.2

TEMPERATURE

magnetic actuator (EMA) area

The operating temperature range of the RP04 is from 60°
to 90° F (16° to 32° C). The nonoperating temperature
range is from 50° to 110° F (10° to 44° C). The operating
temperature gradient is 12° F/hour, and the nonoperating
temperature gradient is 15° F/hour.

EMA temperature control

Logic cage cooling

Forced air cooling of the shroud (disk pack) area fixes the
3.3

RELATIVE HUMIDITY

temperature of each disk in the pack with respect to all

Humidity control is important in any system as static

other disks in the pack, ensuring that differences in thermal

electricity can cause errors in any CPU with memory. The

expansion of the disks will not prohibit the drive from

RPO4 is designed to operate efficiently within a relative

processing data to and from the pack. With the disk pack

humidity

range

of 20

percent to

80 percent, with a

and EMA areas pressurized, foreign matter is forced out

maximum wet bulb temperature of 77° F (25° C) and a
minimum dewpoint of 36° F (2° C).
3.4

instead of being pulled in.

Room air is drawn into the RP04 by the air system blower
through the prefilter, and then forced through the Absolute
filter. The prefilter removes the large particles of foreign

HEAT DISSIPATION

The heat dissipation factor for the RP04 Disk Drive is

7000 Btu/hr. By adding this figure

matter from the air, reducing the frequency of replacement
of the Absolute filter, which is a 0.3-micron filter. The

to the total heat

dissipation for the other system components, and then
adjusting the result to compensate for such factors as the

clean air output of the Absolute filter is transferred to the

number of personnel, the heat radiation from adjoining

shroud area via an air duct; there the air is distributed into

areas, sun exposure through windows, system efficiency,

the disk pack and forced through the carriage opening

etc., the approximate cooling requirements for the system

can be determined. It is advisable to allow a safety margin

(cooling the access transducer) into the EMA area to
pressurize that area and force air through the EMA to cool

of at least 25 percent above maximum estimated require-

it.

ments.

A muffin fan, mounted on the electronic gate, draws the air
3.5

through the drive electronic area, cooling the drive electronic components, and then discharges the hot air to the
rear of the drive. Even though the muffin fan is canted

AIR CIRCULATION

The air circulation system of the RP04 Disk Drive consists
of a blower motor, a muffin fan motor, a prefilter, and an

3-1

Figure 3-1

ELECTRONIC GATE
MUFFIN FAN

SHROUD INLET

3) N/ / r / ;
'
/

3-2

/
Air Circulation System

N\
MUFFIN FAN LOCATED
BEHIND THE ABSOLUTE

NOTE

FILTER

ABSOLUTE
FILTER

4
11}

w
a
a

5
TH

slightly to the rear, the kick plates must be installed on the

3.9

front and sides of the drive so that the hot air exhausted

Although

from the electronics area will not be recirculated by the air

computer system, it is particularly crucial in the case of a

CLEANLINESS
cleanliness

important

all

facets

of a

system blower. To ensure that exhausted air moves freely

device such as the RP04 Disk Drive. Disk packs are not

away from the drive, floor air-conditioning outlets should

sealed units and are extremely vulnerable to dirt. Even such

not be placed at the rear of the drive.

minute

smudges,

obstructions

dust

specks

smoke

can

particles,

cause

head

fingerprint

crashes

and

catastrophic destruction of heads and/or disk surfaces, as
3.6

ACOUSTICS

illustrated in Figure 3-2.

Most computer sites require at least some degree of acoustic
treatment; however, the RP04 Disk Drive should not add

During site preparation, there are a number of steps that

unduly to the overall acoustic problem. Acoustic materials

may be taken to enhance subsequent cleanliness:

should neither produce nor harbor dust.
1.

Seal all windows in the vicinity of the RP04

location.
3.7

RADIATED EMISSIONS

Sources of radiation such as FM, vehicle ignitions, and radar

If partitions are to be installed, consider floor-

transmitters located in close proximity to the computer

to-ceiling walls, which minimize the flow of

system may affect the performance of the RP04 Disk Drive

dust.

because of the possible adverse effect magnetic fields can
have on disk packs. A magnetic field with an intensity of 50
oersteds

might

destroy

all

of the

information

Check

that

the

flow

of air

from the

air-

conditioning system will tend to carry lint, etc.,

individual disk pack.

away from the RP04 location. Provide filtration
to inhibit dust and other particulate matter.
4.

The effects of radiated emissions can be reduced by:

painting

done

advance

installation, select paint for walls, ceilings, and
a.

Grounding

window

screens

and

other

floors that will not tend to flake or powder

large

excessively. (Waterbound distemper is generally

metal surfaces

unsatisfactory in this respect.)
b.

Shielding interconnection cables with grounded
5.

shields

Select

acoustical

material

that

will

neither

could

produce

produce nor harbor dust.
c.

Providing additional grounding to the system

cabinets

Avoid

glass

fiber

tiles

that

abrasive particles, and floor coverings that tend

to crack or crumble.

In extreme radiation environments, providing a
grounded cage for the system.

7.
3.8

ALTITUDE

Computer system operation at high altitudes can result in

Provide closed cabinets for disk storage.
Clean

and

vacuum

subfloor

areas

and

air-

conditioning systems just before installation.

heat dissipation problems. The maximum altitude specification for the RP04 is 6500 ft (1980 m). If operation at high

Place impregnated mats at each entrance to

altitudes is anticipated, DEC should be notified when the

reduce the

equipment is ordered.

other areas.

3-3

amount of dust tracked in from

HUMAN HAIR
.004 DIA

DISK

HEAD

FINGERPRINT
SMUDGE

SMOKE

PARTICLE

NN
\\\

250u"

FLYING
HEIGHT

APPROX 50-100"

///

5 A\

/«+—RP03-2400
S S RPM(APPROX
S S 93SMPH)S
<«—RP04-3600 RPM(APPROX 140MPH)

08-1097

Figure 3-2

Disk Pack-Relationship of Disk Head, Disk, Contaminants

3.4

CHAPTER 4
INSTALLATION

This chapter includes the procedures required to unpack

Table 4-1 (Cont)

and install the RP04 Disk Drive. The RP04 is designed to be

Tools Recommended for RP04 Installation

installed as a remote device, with control logic contained in

an attached Drive Control Logic (DCL) unit (Figure 1-1).
4.1

UNPACKING AND INSPECTION

The

RP04

Disk

Drive

weighs

approximately

Part No.

600 lbs

(272 kg); it requires a forklift or similar handling equipment to be moved or lifted. Table 4-1 lists special tools and
equipment that could be required during an RP04 installation.

CAUTION

Air measuring kit

29-21290

C.E. Pack 3336

29-21292

Data pack

RP0O4-P

Device Diagnostic Unit (DDU)

29-21828

When moving or lifting the RP04 Disk Drive,

The following equipment may be required if problems

always grasp the frame structure. Do NOT hold

arise during RP04 installations:

any part of the top or side covers.
Item

Part No.

Head installation tool (Figure 4-1c)

29-21285

Carriage alignment tool

29-21286

Head initial alignment tool (Figure 4-1d)

29-21287

Extend jump card

29-21291

Field Service Tool Kit

Extractor tool

29-21412

Tektronix 453 oscilloscope, or equivalent

Extractor pin

29-21288

NOTE

Extender reverse

29-21482

Oscilloscopes or meters used in the

Torque wrench kit

29-21487

Shim gauge (3 mil) (Green)

29-21483

Shim gauge (5 mil) (Blue)

29-21484
29-21486

Table 4-1
Tools Recommended for RP04 Installation
The following equipment is required for all RP04 installations:
[tem

Part No.

field should be calibrated frequently.
Meter readings must be accurate

within +1%, oscilloscopes within
+3%.

Head fine alignment tool (Figure 4-1a)

29-21284

Shim gauge (2 mil) (Red)

Head separator tool (Figure 4-1b)

29-21288

Brush
4-1

’

29-21481

[

50 ONIIN

A
3\

/’fi«N\ NEANKONNN

/d W(/ G =
»

7
Head

b. Head Separator Tool

Fine Alignment Tool

T i

c. Head Installation Tool

Head

Initial

Alignment

Tool
CP-1356

Figure 4-1

Special Tools for RP04 Installation

Remove the staples that fasten the four wooden

The procedure for unpacking the RP04 is as follows:

slats to the bottom flanges of the cardboard
overlap carton.

The

RP04

shipped on

a shipping skid,
Remove the cardboard overlap carton.

covered by a cardboard carton (Figure 4-2).
Remove the two plastic straps that hold the
disk pack on top of the carton, then remove the

Remove the polyethylene bag that covers the

disk pack.

RP04 (Figure 4-3).

4-2

PLASTIC CORNER
SUPPORT (4)
DISK

PACK

3" GLASS —A
FLEX TAPE

—— PLASTIC
STRAPPING

{ =——— CARTON
BOX

CP-1357

SKIRTS, CABLES

AND HARDWARE
PACKAGED HERE

CP-1358

Figure 4-3

Shipping Configuration, Box Removed

4-3

Remove

the package resting on top of the

10.

Visually inspect the RP04; tighten all subassembly mounting hardware and all terminal

RPO04; verify that it contains the following:

connections.
Item

(The subassembly locations are

identified in Figures 3-1 and 4-4 through 4-9.)

Part No.

Remove the sliding door cover assembly to
Skirts (7)

7411193

Screws (8)

9006418-1

Open

Lock washers (8)

9006690

terminal connections and mounting hardware.

inspect the brush drive and support assembly.
the

sequencer assembly to check the

Flat washers (8)

9006661

Access to the sequencer is gained by releasing

Power sequence cable

7009491-0-1

the gate latch and opening the electronic gate

Massbus cable*

BCO06S-02

assembly.

Ground wire strap

7412827-03-0

release

Two

the

quick-disconnect

sequencer

cover,

and

fasteners
a

single

knurled screw inside the sequencer releases the

door. Access to the DCL backplane is gained by

*QOne each for single-access unit; two each for dual-access unit.

removing the front cover. To then gain access
6.

Remove the tape from the door end panels.

Visually inspect the exterior of the RP04 for

and down, and loosen two screws to remove the

evidence of shipping damage. Retain the orig-

inside cover. To gain access to the DCL power

inal packing materials and receipts in case any

supply, remove the front cover.

to the logic modules, loosen the two thumbscrews at the top, pivot the assembly forward

claims

are

filed

for

shipping

damage.

All

damage claims should be promptly filed with
the

transportation

company

involved,

11.

and

Check the drive power requirements on the

nameplate (Figure 4-10) to verify that they

Digital Equipment Corporation should be noti-

agree with facility power.

fied immediately of any such claim.

Paragraph 4.5 for conversion procedures. Verify

Remove all service covers for inspection.

4.6.

If not, refer to

power system wiring as described in Paragraph

NOTE

12.

Side covers are not used between drives

Release the gate latches to open the electronic

gate assemblies (Figures 44 and 4-5); check

that are to be installed side-by-side in the

that all modules are properly seated and that all

string configuration. Only exposed sides

wiring harness connectors are properly con-

should be covered.

nected.

Push and release the operator cover latch, then

13.

slide the operator cover to the rear. Manually

Check that matrix modules and head plugs are

properly seated (Figure 4-9).

turn the spindle in a counterclockwise direction

verify

that it

spins

freely.

Depress

cone-shaped, pack-lock actuator

the

at the left

14.

Visually check the cam-follower surfaces of all

head/cam assemblies to verify that arms are

front of the spindle; manually turn the spindle

properly engaged with cams on tower assem-

in a clockwise direction. The spindle should

blies.

lock to verify that it will hold the pack and
permit disk pack top cover removal.
15.

Check the four 40-pin ribbon cables (marked A,
B, C, and D) that connect the drive to the DCL

NOTE

The drive is transported with a shipping

unit (Figure 4-11); ensure that the connectors

bracket

are securely seated in the corresponding (A, B,

installed

prevent

carriage

assembly motion during transit. Do NOT

C, or D) receptacle on module A04 or BOS

remove this shipping bracket yet.

(Figure 4-12).

[
]

000
AAO5 —
| |

ELECTRONIC!
GATE A1

fi\*

DRIVE

/omvs

RECEIVER

DCL E LECTRONIC
GATE

SEQUENCER

DCL

_—TN

GROUND LEAD

STRAIN RELIEF /
BRACKET

L
MASSBUS

POWER SUPPLY __—

C L]

30 AC INPUT
CABLE

SIGNAL /

CABLES

CONNECTORS

DCL AC CONNECTOR
SINGLE

FILTERED AC
CP-1359

”””,///////J’//’

SEQUENCER

DRIVE

ELECTRONIC GATE ————
A1

RESONANT
CAPACITOR

DRIVE
POWER SUPPLY
2
CP-1360

Figure 4-5

RP04 Drive Rear View

4.5

TM~

\\\\\\//‘/////
C

F3-1

é@fiF

F2-1 AMP

F315 AMP

@%t;;

AMP

cB2

— CB1

DCL AC POWER
CONNECTOR
RESONANT
CAPACITOR

POWER

SUPPLY
A2

INPUT

CONNECTOR
SEQUENCER

POWER TRANSISTOR
HEAT SINK

POWER SUPPLY
TERMINAL BOARD

F4 6/10 AMP

~”

POWER

DRIVE

TRANSFORMER

GROUND BUS
A2WA

POWER SUPPLY

DRIVE POWER
SUPPLY
A2
cCP-1381

Figure 4-6

RP04 Power System

4-6

T~
01

(58

SPINDLE ASSEMBLY

BRUSH DRIVE ASSEMBLY
PACK LOCK
ASSEMBLY

SPEED
SENSOR

PACK ON
SWITCH

cpP-1362

Figure 4-7

Disk Rotation System

4-7

FORWARD STOP
SWITCH

CARRIAGE

ACCESS

TRANSDUCER
EMA

EMN
FILTER

FAILSAFE
RESERVOIR

DRIVER

OVERLOAD
PROTECTION

CP-1363

Figure 4-8

Cylinder Positioning Components

4-8

view (&) 90° ccw

HEAD (4)
A DOWN

viEw (B) 90°
HEAD

SERVO HEAD

'=|

o|l|

ol|

‘I ||

el|

0
12

CR=RIR

A UP
HEAD (5)

)

I>—==T6||
__
\L"——EL%FJ”—:D Lo

15
17

T-BLOCK (A SIDE)

e
3
[=]

g PN

-—-——-'.

o =TT
-

Do=—=IT

~__
7~

—

B UP

HEAD (5)

T-BLOCK (B SIDE)

HEAD

B DOWN

S ,_m_ELJ-——u«L ol 1

A DOWN

NUMBERS

/’//\\ ~

N
N

ASSEMBLIES

EVEN

MATRIX CARD

ODD

TM~

MATRIX CARD

CP-1364

Figure 4-9

Head Arrangement

4.9

RPO4-BB
RP@4-BA
RP®4-AB
RP@4-AA

IDENT (50 HZ DUAL PORT)
IDENT (60 HZ DUAL PORT)
IDENT (50 HZ SINGLE PORT)
IDENT (60 HZ SINGLE PORT)

GROUND
SERIAL
NUMBER TAG

Figure 4-10

STUD
CP-1465

Location of Nameplate

and Serial Number Tag

POWER

CABLE

(PLUGS INTO J2)

POWER

(PLUGS

LINE

INTO J1)

CP-1463

Figure 4-11

Location of Cable Connections

4-10

4.2.1

Safety Precautions

Observe

the

following precautions to avoid injury to

personnel or damage to the equipment:
1.

Keep fingers and hands out of the area between
the carriage and the disk pack while the drive is
ON.

Always

remove ac power cables when it is

necessary to work inside the drive sequencer
AT1AOS5

assembly

the

transformer

assembly

terminals when the drive is not operating; high

potentials
up
to
230 Vac/60Hz
400 Vac/50 Hz are present.

Use only nonmagnetic tools near the EMA,

which includes an extremely powerful magnet.
Use care when working in the EMA area with

magnetic materials, even though flux leakage is
low in the pack area and outside the drive.
Keep read/write heads away from the EMA.

Avoid touching or blowing breath on read/write
heads; skin acids can etch and ruin heads and
breath can cause condensation deposits that

could disfigure the gliding surface.

A1BOS
CP-1365

Figure 4-12

Never manually move the carriage assembly
forward without a spinning disk in place or the

DCL/Drive Signal

head separator tool installed.

Interface Connections

Never remove or change modules without shutting down all internal drive power.
16.

Measure

the

electromagnetic

actuator

coil
4.2.2

assembly resistance across the coil leads to
determine that the resistance is 1.60 ohms
(typical) and that no shorts or opens exist.

Installation Procedure
1.

Roll the RP04 to its designated location. Level
it by lowering the six levellers, removing all

17.

weight from the casters (Figure 4-4).

Replace all service covers removed in step 8,
unless off-line checkout is to be performed at

Remove the two rear panels from the RP04.

this time.

4.2

Verify that the facility ac power agrees with the

INSTALLING THE RP04

The first RP04 Disk Drive must be mounted within 40 ft of

RP04 input power configuration (Paragraph

the controller and within 15 ft of a facility ac power

4.6). If a discrepancy exists, change the ac

source. The safety precautions in Paragraph 4.2.1 should be
observed while following the installation procedure in

input power configuration of the RP04 to

Paragraph 4.2.2.

4.5).

conform to available facility power (Paragraph

4-11

Check that CBI1 is OFF (Figure 4-13); then
connect the power cable

the RP04. The

Check that the power sequence jumper (P/N
7009490) is installed in J12 of the DCL. (Refer

cable to use is:

to drawing D-UA-RJP04-A-0.)

70-6464-4 — 60 Hz

70-6464-3 — 50 Hz

Connect

the

round

25-ft

Massbus

cable

(BC06S-25) from the DCL connector marked

“Controller A Input” to the connector panel in
the controller cabinet.
It is possible to daisy-chain two drives to a

single ac power source by plugging the power

cable of the first directly into the source and
connecting the

first

drive

If the installation is multidrive, proceed to step
10; otherwise, proceed to step 14.

the second by

means of an 8-ft power cable jumper (P/N

10.

Connect a round 2-ft Massbus cable (BC06S-02)

7006600-1).

from the DCL connector marked ‘““Controller A

Connect a 25-ft ground wire (P/N 7412827-25)

marked “Controller A Input”.

Output” to the connector in the second drive
from the ground stud at the bottom of the DCL
to

the

stud

the

bottom of the cabinet

11.

containing the RH11 or RH10.

Repeat step 10 for each additional drive in the
configuration.

~
CB2

] &

@ i

1
]

,©

r—-

DEDU POWER
CONNECTOR

AC INPUT
CONNECTOR

l
AC OUTPUT
CONNECTOR

i
DCL AC POWER
CONNECTOR

A16J1
CP-1366

Figure 4-13

Drive Connectors and Circuit Breakers

4-12

12.

Daisy-chain all drives by connecting 3-ft ground

lines indicate the two regulator board modules (Al and

wires from one DCL stud to the next.

A2). The DCL power supply is activated by turning ON the
CB1 circuit breaker at the base of the drive.

13.

Daisy-chain all drives by connecting 3-ft power

Regulator Board Al issues:

sequence cables (7009491-1) from J13 of the
preceding drive to J12 of the next. For the first

drive, the power sequence jumper should be

connected to J12.

"AC LOW and DC LOW to the power monitor — If these voltages should fail, the power

monitor will set error flags.
14.

For the last drive, connect a Massbus termina-

the DCL

+5 Vdc to the power monitor and to the DCL

A Output”. In

backplane — This voltage should be viewed on

some cases, M5S903YA transceiver cards may be

the power monitor and adjusted on the power

used instead of the terminator pack assemblies.

supply.

tor

pack assembly (7009938) to

connector marked “Controller

NOTE

-15 Vdc to the DCL backplane — This voltage

For a dual-controller configuration (refer

should be viewed at the backplane and adjusted

to drawing E-UA-RJP04-B-0), the installa-

on the power supply.

tion of the second Massbus should follow
Regulator Board A2 issues:

the above pattern. The DCL connectors

used are

those marked

“Controller B

Input” and “Controller B Output”. A

AC LOW and DC LOW to the power moni-

second Massbus terminator must be used

tor — If these voltages should fail, the power

in the last drive. The second controller

monitor will set error flags.

may be mounted in the same box as the
first or in a different cabinet. If the same

+5 Vdc to the power monitor and to the DCL

box is used, a second receptacle housing

backplane — This voltage should be viewed on

is mounted in the connector panel to

the power monitor and adjusted on the power

accommodate

supply.

the

second

Massbus;

different cabinets are used for the controllers, two connector panels are neces-

+15 Vdc to the power monitor — This voltage

sary.

should be viewed on the power monitor and
adjusted on the power supply.

15.

Lower the logic nest assembly in the DCL and

CAUTION

remove the rear cover.

To avoid possible damage to the equipment or

16.

Set

the

drive

unit

number

the

to the electrical system, do not adjust voltages

M7775

beyond the limits shown in Figure 4-15a.

module.
4.3

4.3.2

INSTALLATION CHECKS AND ADJUSTMENTS

Drive Power Supply Voltage Check

To verify performance and adjust the RP04, perform the

various

installation

checks

and

adjustments

CAUTION

described

Ensure that CB1 is OFF before changing the

below.

position of any other circuit breaker.
4.3.1

DCL Power Supply Voltage Check

Power supply dc voltages must be within the required

The DCL power supply develops three dc output voltages

(+5 Vdc, -15 Vdc, and +15 Vdc), and is constantly moni-

ranges, as shown in Figure 4-15b. Place circuit breakers to

tored by a power monitor unit. The heavy dotted line in

the ON position. Check dc voltage levels between the drive

Figure 4-14 indicates the chassis outline; the lighter dotted

power supply terminal board TB1 and the ground bus W1.

4-13

!____._____..____________

wlmsl m‘”l"lw nj->

=8
AC LOW

—< GND
—< GND
—<GND
—< GND
—< GND
—< GND
—< GND
—< DC LOW

—< +5V

-t

REF:D-CS-5409728-0-1

—< +5V
—< +5V

—< +5V
—< -15V

CENTER TAP >—

—ll

VAC)>—

lto m]ul [

22-34

22-34 VAC)>—

el
AV [ 9]

Li NE VOLTAGE OUTPUT:

[

mbgmlilammqmmbum

—( AC LOW
—< GND
—< GND
—< GND

—<GND

—< GND
—< GND
—< GND
—<DC LOW

—< +5V

—< +5V
—< +5V
—< -15V-NOT USED
——{ +15V
o

[

- |-

GND >—

]*Dmunuma

>—

CIEICENE

115 VAC {:

‘bl-s X

(OVE R TEMP SWITCHED)

L ¢ +15v-NOT USED

s
i O

CP-1367

Figure 4-14

DCL Power Supply Schematic

TBI
3

91011
1213

[

(=a EPEERLRE
L]

12345
6 7 8

e 00SODe®

PIN NUMBER

|NOMINAL VvDC | VDC LIMITS

+20.5

+19.5 TO +21.5

SIGNAL

LIMITS

+12.5

+11.9 TO +13.1

+5VDC

5.0 TO 5.2 VDC

+50

+4.75 TO +5.25

+15VDC

14.9 TO 15.3 VDC

- 5.0

-4,75 TO -5.25

-12.5

-11.9 TO -13.1

-22

-20.9 TO -23.1

-15vDC

-14.9 TO -15.3 VDC

AC LOW

4.5 VDC MIN

DC LOW

4.5 VDC MIN

a. DCL

-40

-38.0T0-42.0

-48

-432T0-52.8

b. Drive
CP-1368

Figure 4-15

4.3.3

DCL and Drive Power Supply Voltages

Hold Reverse Current Check

Manually move the carriage forward from the
retracted position.

CAUTION

Do NOT remove the shipping bracket to per-

Tum CB1 ON. Check for the presence of hold

form this check.
1.

Remove the rear cover assembly.

With CB2 ON and CB1

reverse current by verifying that the carriage
moves backward against the rear stop.

OFF, jumper the

pack-on switch contacts below the spindle.
a jumper

Connect

between

A1B1649

Turn CB1 OFF.

and

Remove ground from A1B1649 and remove the
jumper from the pack-on switch.

B1602 (ground) on the electronic gate assembly
back panel.
CAUTION

forward off the cams when performing

Remove the shipping bracket (the L-shaped
bracket inside the disk shroud) and replace the

this step.

mounting screw.

Ensure

that the heads do NOT move

4-15

4.3.4

Head Load Check

The head load check is performed during the power-on

System offset must be adjusted after changing the TF Servo
Amplifier module (A1A03), the TF Servo Clock module

sequence to ensure that operational status can be attained.

(A1A04), or the Servo Select module (A1A13). The

The procedure is as follows:

procedure is as follows:

CAUTION

The

head

lock

shipping

bracket

must

removed before this check is performed.

2.
1.

Tum CB1 OFF, install the disk pack on the

turn CB1 ON.

the

drive cycles
power-on sequence, observe that:

Release the gate latch to open the electronic
gate assembly and insert the DDU buffer paddle

assemblies (75004226 and 75004225) into

Depress the START switch to the latched-down

position.

Remove the rear cover assembly and set CB1 to
OFF.

drive, turn other circuit breakers ON, and then

Stop the drive by depressing the START switch
to release it from the latched-down position.

drive sockets A1A09 and A1A10, respectively.

through the
4.

Connect the 9-pin power cable plug of the DDU

The drive motor starts and the disk pack rotates

to the drive power supply receptacle (A2J2).

in a counterclockwise direction.

Do not start the drive at this time.

NOTE

Set CB2 to OFF (or the DEDU EMA switch to
DISABLED), then set CB1 to ON.

If the disk pack rotates in a clockwise
direction, change the phase connection at

the ac power connector.

Set the DDU FUNCTION switch to SYSTEM
OFFSET.

The brushes cycle into and out of the disk
pack.

Set the DDU RANGE switch to GL POS SIG.

The carriage moves forward to load the heads,

Adjust the potentiometer on the drive Servo

Select

then returns to cylinder 000.

module

(A1A13)

for

zero meter

indication.
NOTE

The heads will not load if the disk pack is

Set the DDU FUNCTION switch to the unlabeled top position.

rotating in the wrong direction.
The READY indicator lights.

10.

Depress the START switch again to release it

11.

Set CBI to OFF.

Set CB2 to ON and the DDU EMA switch to
ENABLED.

from the latched-down position, and check the

operation of the dynamic brake. The disk pack
should stop rotating within 15 seconds. Verify

NOTE

that the dynamic brake is disabled by turning

System offset adjustment will affect head
alignment. Verify head-alignment (Para-

the pack slowly by hand.

graph 4.3.10.1) before returning the drive
4.3.5

to service.

System Offset Adjustment

Drive track-following system offset is adjusted with the
carriage in the retracted position by varying the poten-

tiometer

on the Servo

Select module (A1A13) while

observing the meter of the Device Diagnostic Unit (DDU).

4.3.6

Tachometer Gain Adjustment

Tachometer gain may be adjusted in either of two ways,
depending on whether or not a DDU is used.

Tachometer Gain Adjustment Using a DDU

10.

Set the DDU FAILSAFE/INHIBIT switch to
FAILSAFE.

Set the DDU RANGE switch to POS SIG.

Set the DDU FUNCTION switch to GL POS 2

Tachometer Gain Adjustment Using a Dual-Trace OscilloADJ.
Monitor

Set the DDU EMA switch to DISABLE.

the

A1A1529

Cylinder

and

Glass

Vicinity

Position

signal

A1A1532 on a dual-trace oscilloscope.

CAUTION

Set the DDU FAILSAFE/INHIBIT switch

Switch

to INHIBIT before proceeding, to guard

Return CB1 to the ON position.

CB1

OFF,

then

switch

CB2

OFF.

against crushed fingers.

Jumper pin A1B1649 to ground (A1B1602).
Install a scratch pack and start the drive.

This disables the Failsafe Unload function.

Manually load the heads; move the carriage

Install a scratch pack and start the drive.

assembly back and forth repeatedly. The extent

of carriage motion, while not critical, should be
long enough to provide stable meter indica-

Manually

tions.

load

the heads onto the spinning

pack.

While moving the carriage assembly, adjust the
lower potentiometer on the tachometer module

While manually moving the carriage assembly

(A1A15) for a zero meter indication.

back and forth, adjust the upper potentiometer

the

tachometer module

(A1Al15)

for

Set the DDU FUNCTION switch to GL CYL

Cylinder

VIC ADJ.

8.2+0/-0.2 V peak-to-ground (Figure 4-16).

Vicinity

signal

amplitude

a
of

Repeat the manual carriage assembly movement

and

adjust the upper potentiometer on the

While continuing to move the carriage assembly

tachometer module (A1A15) for a zero meter

back and forth manually, adjust the lower

indication.

potentiometer

the

tachometer

module

(A1A15) for a Glass Position 2 signal amplitude
Depress the DDU RECAL pushbutton and set

of 8.2+0/-0.2 V peak-to-ground (Figure 4-16).

the EMA switch to ENABLE. The drive servo

These waveforms must be within tolerance and

will perform a Recalibrate seek to cylinder 000.

as close to equal as possible.

CYLINDER

5 8.2 +0.0 -0.2V PEAK

VICINITY

A1529

—-L — Y— +700 MV MAXIMUM

GLASS

POSITION 2

—

A1532

¥.

0 VDC

CP-1369

Figure 4-16

Cylinder Vicinity and Glass Position 2 Waveforms

4-17

depress the START switch to release it from

Halt the routine, then add the roll chart values
below each illuminated LED indicator to com-

the latched-down position. Wait for the disk

pute access time.

Return the heads to the retracted position, then

pack to stop rotating, then remove the jumper
from

A1B1649.

Remove

the

10.

oscilloscope

Repeat steps 8 and 9, above, for the Reverse
Seek.

probes from A1A1529 and A1A1532, and then

remove the scratch pack. Set CB1 OFF and

11.

reset CB2. Return CB1 to the ON position.
4.3.7

If both indicated access times are 27.6 to
28.6 ms, no adjustment is required. If either
access time is less than 27.6 or more than

Access Velocity Check

Access time is checked to determine the interval of the

28.6 ms, adjust the Curve Generator module

Seek

(A1A12) potentiometer so that the access time

In Process signal at B1314. The elapsed time is

is 28.1 ms (hex 36).

displayed in binary form by the LED indicators on the
DDU GATE LOGIC DISPLAY. The value assigned to each

Alternate

Access

Time

Adjustment

Pro-

LED position is indicated on the roll chart at function 12,

4.3.7.2

ACCESS

TIME. For example, 27.6 ms access time is

cedure — Access time may be verified and adjusted with the

indicated by illuminated LEDs above the 16.7-, 8.3-, 2.1-,

RP04 operating on-line by using a dual-trace oscilloscope,

and 0.5-ms positions (hex 35). An access time of approxi-

as follows:

mately 28 ms should be displayed for a 136-cylinder seek.

To determine access time, perform the appropriate pro-

Monitor the Seek Start signal at A1B0817 and
the

cedure below.

Access

Ready signal at A1B1315 on a

dual-trace oscilloscope.
4.3.7.1

Access Time Adjustment Using a DDU

2.
1.

Adjust the oscilloscope to trigger on negative
(-) transition of the Seek Start signal.

Stop the drive by depressing the START switch
to release it from the latched-down position.

Perform a 136-cylinder Seek/Seek operation

The time interval between the SEEK START
and ACCESS READY signals should be be-

Remove the rear cover assembly and set CB1 to
OFF.
Release the gate latch to open the electronic

gate assembly and insert the DDU buffer paddle

assemblies

(75004226

and

75004225)

tween 27.6 ms and 28.6 ms for seek operations

into

in both directions. If it is not, adjust the Curve
Generator module (A1A12) potentiometer so

drive sockets A1A09 and A1A10, respectively.
Connect the 9-pin power cable plug of the DDU

that the access time is within the specified

to the drive power supply receptacle (A2J2).

parameters.

Set the DDU switches as follows:
4.3.8

Air Pressure Check

FUNCTION — unlabeled top positions

An Air Measuring Kit (P/N 29-21290) is used to measure

EMA — ENABLE

the air pressure drop across the Absolute filter and the air

FAILSAFE/INHIBIT — FAILSAFE

pressure beneath the EMA cover. The procedure for this
check is as follows:

Set CB1 to ON.

Remove the rear cover assembly of the RP04
drive.

Set the DDU GATE LOGIC DISPLAY thumb-

wheel to display function 12, ACCESS TIME,
on the roll chart.

Install a pack.

Perform a 136-cylinder Seek Forward operation

Depress the START switch to the latched-down
position. Wait for the heads to load.

4-18

Connect

the

gauge

the

EMA

quick-

Connect an oscilloscope to the Data Separator

disconnect connector on the rear of the RP04

+OSC 1 output (A1A0737).

drive. The air pressure must measure more than
0.7 inches of water.

Adjust the upper Data Separator potentiometer

Connect the gauge to the FILTER INTAKE

period of 155 ns (Figure 4-17).

(frequency) (A1AQ7) to establish a waveform
5.

quick-disconnect connector on the rear of the
RP0O4

drive. The air pressure must measure

Adjust the lower Data Separator potentiometer

more than 3.5 inches of water.

(window)

(A1A07) to

establish equal half-

cycles of 77.5 ns each (Figure 4-17) with scope
6.

Connect the gauge to the FILTER OUTLET

set at 1 ms/div.

quick-disconnect connector on the rear of the
RP04

drive. The air pressure must measure

10.

Remove the ground installed on pin A1B0637.

11.

The fine

more than 2.0 inches of water.

alignment of the Data Separator

requires the Data Separator to be turned on
4.3.9

Data Separator Adjustment

(DS ENABLE) and the DATA SEPARATOR

The procedure used to adjust the data separator installed in

ERROR signal to be adjusted for optimum

the 733 DEC drives will depend on the level of the Read

response in an all zeros area.

Write Data Control module (75007160) in (A1B06) position. Paragraph 4.3.9.1 describes a procedure that may be

If the

followed to align the Data Separator if a -1 or -2 level

execute a routine to read at least one record per

Read Write Data Control module is installed in the drive.

revolution.

DCL

used as the control source,

The DCL or the 733 DEC DEDU must be used to control
Data Separator turn-on. Paragraph 4.3.9.2 describes the

If the 733 DEC DEDU is used as the control

procedure which may be followed if a -2 level Read Write

source:

Data Control module is installed in the drive without the

use of the system (DCL) or the 733 DEC DEDU.

Place the DEDU PROGRAM switch in
the READ position.

4.3.9.1

Data

Separator

Adjustment

(75007160-1

Place

75007160-2)

the DEDU ROUTINE switch to

WRITE/READ.
Initiate the DEDU READ routine.

Depress the drive START/STOP switch to stop
the drive.

12.

Connect the oscilloscope A channel to the +DS
ENABLE signal (A1B0655). Adjust the oscillo-

Place the drive circuit breaker CB1 to the OFF

scope to trigger on the leading edge of the +DS

position.

ENABLE signal.

Install a scratch pack, formatted for use in the

system

(if

the

system

13.

control Data

Separator turn-on), or containing data written
by the

Connect

the

DATA

SEPARATOR

oscilloscope

channel to the

ERROR

signal

(A1A0715).

DEDU (if the DEDU is to control

turn-on).

14.

Observe the waveform on channel B and adjust
the upper potentiometer on the Data Separator

Ground (A1B0602) the Coarse Alignment to

the Read/Write Data Control board (A1B0637).
5.

module (A1A07) for minimum distortion and
optimum

DATA

(A1A0715)

response.

SEPARATOR

Optimum

ERROR

response is

Place the RP04 circuit breaker CB1 in the ON

defined as recovery to the normal null level in

position.

the minimum time without overshoot or oscilla-

tion. Oscillations may occur at both limits of

Depress the drive START/STOP switch to start

the

the drive.

(Figure 4-18).

Data

Separator

wupper

potentiometer

1
]
1
LR

| i
LI
B

|I|

P S
i

+ OSC |

A1AOT37

———l

5 NSEC
7

155 NSEC

e
oy
o
F

CP-1370

Figure 4-17

+ DS

Data Separator Coarse Adjustment

ENABLE

A1BO655

OVERSHOOT

g
4

DATA

SEPARATOR

ERROR
A1AO715

' d

A L

_—

—
—

—

UNDERSHOOT

OPTIMUM
CP-1371

Figure 4-18

Data Separator Fine Adjustment

4-20

4.3.9.2

Data Separator Adjustment (75007160-2)

12.

Connect the oscilloscope A channel to the +DS

ENABLE signal (A1B0655). Adjust the oscillo1.

Depress the drive START/STOP switch to stop

scope to trigger on the leading edge of the +DS

the drive.

ENABLE signal.

Connect the

oscilloscope B

channel to the DATA SEPARATOR ERROR
Place the RP04 circuit breaker CB1 in the OFF

voltage at (A1A0715).

position.

13.
Install a scratch disk pack.

Observe the waveform on channel B and adjust
the upper potentiometer on the Data Separator

module (A1A07) for minimum distortion and
NOTE

optimum

DATA

Alignment of the Data Separator by this

response.

Optimum

SEPARATOR

method does not depend on pack format.

recovery to the normal null level in the mini-

response

ERROR

defined

mum time without overshoot or oscillation.
Ground (A1B0602) Coarse Align input to the

Oscillation may occur at both limits of the Data

Read/Write Data Control board (A1B0637).

Separator upper potentiometer (Figure 4-18).

Place the RPO04 circuit breaker CB1 to the ON

14.

Remove the jumper between the +SECTOR O

signal (A1B0826) and the Read/Write Data

position.

Control board (A1B0633).
Depress the drive START/STOP switch to start
the drive.

4.3.10
Connect the oscilloscope to the Data Separator

Read/Write Head Alignment

The read/write heads must be aligned with the servo head

+0OSC 1 output (A1A0737).

to form a vertical cylinder of 19 data tracks for each servo

location of the carriage. This ensures that disk packs will be
Adjust the upper Data Separator potentiometer

interchangeable and that heads can be replaced without

(frequency) (A1A07) to establish a waveform

losing recorded data.

period of 155 ns (Figure 4-17).
Head alignment is checked by varying the offset required to

center the heads on a data track, detecting when the heads

Adjust the lower Data Separator potentiometer

(window)

(A1A07) to establish equal half-

cycles of 77.5 ns each (Figure 4-17).

cross

the

data

track

the

offset is

decremented in

~ 25-microinch increments from both positive and negative
sides, and averaging the two values to determine the offset

10.

error (within *12.5 microinches). After an adjustment has

Remove the ground installed on pin A1B0637.

been
11.

The

fine

alignment

of the

Data

completed, the

verification procedure

should be

repeated.

Separator

requires the Data Separator to be turned on

(DS ENABLE) in a known zeros area and the
DATA
adjusted

SEPARATOR
for

ERROR signal

optimum response.

4.3.10.1

Connect

Head Alignment Verification

jumper between the +SECTOR
0 (A1B0826)

Depress the START switch to release it from
the latched-down position.

signal and the Read/Write Data Control board
(A1B0633). This causes the leading edge of the

+SECTOR O

pulse

deactivate

the

Place CB1 in the OFF position.

Install an alignment pack on the drive.

ENABLE signal and the trailing edge to activate
the DS ENABLE signal in a known zeros area.

4-21

Connect an

oscilloscope to the Head Align

15.

During head alignment verification, the head

alignment signal waveform should be observed

Signal 1 output (A1B0145). Use an X10 probe.

to ensure that the heads are positioned over the
drive

head alignment tracks. When the head is cor-

electronic gate assembly, and insert the DDU

rectly positioned over the data track cylinder,

buffer

and

the

and

Figure 4-20.

Release

the

gate

paddle

75004225)

into

latch

assemblies
drive

open the

(75004226

sockets

A1A09

waveform

should resemble

View C

A1A10, respectively.
NOTE

Head alignment errors greater than 1200

Connect the 9-pin power cable plug to the drive

microinches

power supply receptacle (A2J2).

may

cause

invalid

sign

change indications.

Set the DDU switches as follows:

4.3.10.2

FUNCTION — unlabeled top positions

Head Alignment Procedure

EMA — ENABLE
1.

FAILSAFE/INHIBIT — FAILSAFE

Depress the START switch to release it from
the latched-down position.

Set CB1 to ON.

Remove the top cover, the EMA cover, and the
Depress

the

drive

START

switch

rear cover from the RP04 drive.

the

latched-down position.

Place CB1 in the OFF position.
10.

Allow the RP04 drive to warm up for one hour.

11.

Set the DDU FUNCTION switch to HEAD

Install an alignment pack on the drive.

Connect an oscilloscope to the Head Alignment
Signal 1 (A1B0145), using an X10 probe.

ALIGN and the DDU RANGE switch to 2000

microinches.
12.

13.

Execute the Head Alignment Verification Pro-

Release

gram (MAINDEC-11-DZRPM), which is sup-

electronic gate assembly, and insert the DDU

the

drive

paddle

gate

latch

plied with the RP04 drive. Figure 4-19 depicts a

buffer

flowchart of a typical Head Alignment Verifica-

75004225) into

assemblies

tion Program.

A1A10, respectively.

Observe the DDU meter; it should deflect to

Set the DDU switches as follows:

drive

to open the

(75004226

sockets

A1A09

and
and

the right for positive offset and to the left for

FUNCTION — unlabeled top position

negative offset. Aligning the heads in a positive
offset of +1200 microinches causes the meter

EMA — ENABLE

FAILSAFE/INHIBIT — FAILSAFE

offset

approximately

2000-microinch

positive

6/10

scale;

the

aligning

the
Place CB1 to the ON position.

heads in a negative offset of —1200 microinches

causes the meter to offset approximately 6/10
Depress

of the 2000-microinch negative scale.

the

drive

START

switch

the

latched-down position.
14.

List or display the head alignment error values
10.

to determine the heads that need to be aligned.
A head

Set the DDU FUNCTION switch to HEAD

ALIGN and the DDU RANGE switch to 2000
microinches. Set the DDU PROGRAM INTER-

displaying a Head Alignment Error

greater than 150 microinches must be aligned.

Aligned heads must display a Head Alignment

RUPT/RUN switch to RUN.

Error less than #50 microinches to allow for the
pack-to-pack differences of 100 microinches.

11.

4-22

Allow the drive to warm up for one hour.

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O vDC

|__ SERVO
DATA
P2

VIEW

HEAD POSITIONED OVER EVEN SERVO TRACK

VIEW B.

(INNER GUARD BAND)
VERTICAL GAIN=5V/CM

HEAD POSITIONED WITH 1200 MICROINCHES

FORWARD OFFSET FROM THE CYLINDER POSITION
TIME BASE= 1 uSEC/CM

VERTICAL GAIN=2V/CM

TIME BASE= 1uSEC/CM

Notes

1. The Servo Data Signal (A@321) is ac coupled

2. Position Signal-P1-(A@323) is dc coupled
3. Position Signal-P2-(A0327) is dc coupled and inverted

4. When P1

The head is correctly positioned over

O VvDC

a cylinder

SERVO

DATA

VIEW C.

HEAD CORRECTLY POSITIONED OVER CYLINDER

VERTICAL GAIN= 2V/CM

TIME BASE= {uwSEC/CM

44— SERVO

DATA
-

VIEW D.

N
.

O vDC

N
o

HEAD POSITIONED WITH 1200 MICROINCHES

VIEW E.

REVERSE OFFSET FROM THE CYLINDER POSITION
VERTICAL GAIN=2V/CM

HEAD POSITIONED OVER AN ODD SERVO TRACK

(OUTER GUARD BAND)

TIME BASE= 1WSEC/CM

VERTICAL GAIN=5V/CM

TIME BASE= {u SEC/CM
CP-1373

Figure 4-20

Track Following Servo Waveforms

4-24

12.

Set the DDU FAILSAFE/INHIBIT switch to
INHIBIT.

The

DDU

HEAD

ALIGNMENT

SAFE indicator will illuminate.
13.

Test the drive failsafe circuits to verify that the
DDU INHIBIT

failsafe

signal has

function

RECAL pushbutton.

disabled the drive

depressing

This

should

the

DDU

Sn¢

cause the

heads to move off track, and the EMA to

deactivate, leaving the heads in the pack.

WARNING
If the carriage assembly performs a recali-

brate when the RECAL pushbutton is
depressed or resists manual movement, a

problem

exists

the

FAILSAFE/

INHIBIT

circuit.

Correct this problem

0
0

before proceeding with head alignment.

Failure to do so may result in personal
injuries and component damage.

14.

Retract

the

carriage

placing

the

DDU

FAILSAFE/INHIBIT switch to the FAILSAFE
position to generate a safety unload.
15.

Stop the drive by pressing the drive START
switch. When the disk pack has stopped, press

CP-1374

the START switch to restart the drive and load
the heads.
16.

Figure 4-21

Execute the Head Alignment Verification Pro-

Observe the waveform on the oscilloscope to
ensure that the head is positioned over the head

gram, which is supplied with every RP04 drive

(Figure 4-19). This should cause the drive to
Control of Head Selection enabled.

alignment track. When the head is correctly
positioned over the data track cylinder, the
waveform should resemble View C of Figure

Set the DDU FAILSAFE/INHIBIT switch to

4-20.

seek to cylinder 245 and stop with Operator

17.

INHIBIT

after

the heads are positioned on

Using the Head Alignment Error Log, loosen

Set the DDU RANGE to 200 microinches and
readjust the head position for a meter indication of less than +25 microinches on the meter

the head clamp screws of the heads to be

scale.

cylinder 245.
18.

19.

Head Alignment Tool Installed

20.

adjusted and retighten to 3in/lb, using the

Remove the head alignment tool,
checking that the meter deflection does not

torque-indicating screwdriver.

exceed £25 microinches.
21.

Select the first head to be aligned. Install the

Secure the aligned head to 7 in/lb, using the

the first head (Figure 4-21) and adjust the head

torque-indicating screwdriver and checking that
meter deflection does not exceed *25 micro-

position until the DDU meter pointer is at zero.

inches.

Head Fine Alignment Tool (P/N 29-21284) in

4-25

22.

Select the next head to be aligned and repeat

baseplate. If drive power and facility power do not agree,

steps 18 through 21.

convert the RP04 wiring as described below. Figure 4-22
shows the conversion points.

23.

When all heads are aligned and secured, perform

4.5.1

Head Alignment Verification as described in
Paragraph

4.3.10.1.

Heads

must

60 Hz/208 V to 60 Hz/230 V Conversion

aligned

within 50 microinches.

Remove

the

brown

wire

from

the

drive

sequencer terminal board TB4 pin 7 and pin 6;
24.

Execute 100 Recalibrate cycles.

25.

Perform Head Alignment Verification.

insulate and tie these wires back.

Locate

the

black wires on sequencer trans-

formers T1 and T2. Connect the T1 black wire
26.

to the drive sequencer terminal board TB4 pin

Realign all heads that exhibit a Head Alignment

7. Connect the T2 black wire to the drive

Error greater then 150 microinches.

sequencer terminal board TB4 pin 6.
27.

When all heads are aligned and verified, press

the RP0O4 START/STOP switch to stop the

Move the wire connecting the sequencer to the

drive power transformer terminal board pin 2

drive.

so that it connects the sequencer to pin 3 of

28.

When the disk pack has stopped, place CB1 to

that board.

OFF.

Use tape or stick-on labels to mark both the
29.

30.

Remove the DDU and oscilloscope from the

sequencer and the drive nameplates with the

drive.

voltage to which the drive has been converted.

Install the

EMA

cover, top

cover,

and

4.5.2

rear

60Hz/230V to 60 Hz/208 V Conversion

cover.

31.

Install a scratch or user pack.

32.

Start the RP04 by pressing the drive START/

Remove

the

black

wires

from

the

drive

sequencer terminal board TB4, pins 7 and 6;

insulate and tie these wires back.
STOP switch.

Locate

the

brown wires on sequencer trans-

formers T1 and T2. Connect the T1 brown wire
4.4

to the drive sequencer terminal board TB4, pin

EQUIPMENT CLEANUP

When the installation procedures, checks, and adjustments

7. Connect the T2 brown wire to pin 6 of that

detailed earlier in this chapter have been completed, all

board.

exterior service covers should be wiped off using lint-free

wipes or cloths and soap and water. When this cleanup is

Move the wire connecting the sequencer to the

complete, the RP04 Disk Drive is ready for use.

drive power transformer terminal board pin 2.

4.5

Use tape or stick-on labels to mark both the

POWER CONVERSION

The basic RP04 Disk Drive power system includes a line

sequencer and the drive nameplates with the

filter, a sequencer, a power transformer, two power supplies

voltage to which the drive has been converted.

(one in the DCL unit), a power control module (29-21243),
a drive motor, a brush motor, and a fan motor. The nor-

mal power configuration of 60 Hz drives shipped from

4.5.3

50Hz/400 V Wye to 50 Hz/230 V Delta Conversion

Digital Equipment Corporation is for 208 V, 3-phase ac
power. There are two standard configurations for 50 Hz

Remove the sequencer transformer wires (T1

drives: 380 V, 3-phase wye ac power and 220V, 3-phase

and T2) on (drive) TB4—7 and TB4—6 (violet,

delta ac power. The factory configuration is indicated on

yellow, or orange), insulate, and tie back into

the drive nameplate, located near the rear corner of the

the sequencer cable.

4-26

8.L9GbEC|
val

)

LINE FILTER A4A14

SEQUENCER

DCL

BLOWER

MOTOR

SEQUENCER

\
POWER

TRANSFORMER

POWER SUPPLY A2
CP-1375

Figure 4-22

RP04 Power System Conversion Points

4-27

Locate and select the sequencer transformer T1

lead

that

corresponds

(brown — 220 V,

the input voltage

red — 230V,

black — 240 V) and connect it to sequencer

TB4—6 in the drive.

that

BLACK

‘

BROWN OR BLACK

BLUE

YELLOW

Locate and select the sequencer transformer T2
lead

corresponds

(brown — 220V,

the

input voltage

1rted — 230V,

or
black — 240 V) and connect it to sequencer
TB4—7 in the drive.

‘

RED

ORANGE

GREEN & YELLOW

CP-1376

Remove the wires between A14-D (line filter

assembly) and sequencer TB2—4, and the ac
connector (A4J4) at the line filter (A14-D).

Figure 4-23

Filter Motor Terminal Board Wiring

(50 Hz/230 V Delta Conversion) |

Connect these two wires to A14-B (line filter).

Remove

the

jumper

between

sequencer

TB1—-17 and TB1—14 in the drive.

Locate and select the sequencer transformer T1

lead

that

corresponds

(violet — 415V,

the

input voltage

yellow — 400V,

Install resistor assembly 76007863-1 between

orange — 380 V) and connect it to sequencer

TB1—17 and TB1—14 in the drive.

TB4-6.

Remove

the

voltage

adapter

plug

Locate and select the sequencer transformer T2

(400 V,

50 Hz) from the RP04 drive motor and install a

lead

230V,

(violet — 415V,

50Hz

voltage

adapter

plug

(76007662-1).

that

corresponds

the

input voltage

yellow — 400V,

orange — 380 V) and connect it to sequencer
TB4-17.

Replace SSRA and SSRB with SSR 29-21236.
Use the existing capacitor and resistor.

Remove the wires between A14-B (line filter

assembly) and sequencer TB2—4 and the DCL
Remove the air filter motor wires from the

ac connector at the line filter end (A14-B).

filter motor terminal board and rewire accord-

Connect these two wires to A14-D (line filter).

ing to Figure 4-23. Do not remove the interconnecting wires from the sequencer.

Remove

the

resistor assembly (76007863-1)

between sequencer TB1—17 and TB1—14.
10.

Ensure that the reference phase wire on the

drive

power

transformer

terminal

board is

Install

connected to the tap that corresponds to the

jumper

(84001467-54)

between

sequencer TB1—17 and TB1—14.

input voltage (TB-3 for 240 V and 230 V input,
or TB-2 for 220 V input).

11.

Remove

the

50 Hz)

from

voltage

the

Use tape or stick-on labels to mark both the

400 V/50 Hz

sequencer and the drive nameplates with the

(76007662-2).

adapter

plug

(230V,

drive motor and install a
voltage

adapter

plug

voltage to which the drive has been converted.
4.5.4

Replace SSRA and SSRB with SSR 29-21235.
50Hz/230V Delta to 50 Hz/400 V Wye Conversion
1.

Use the existing capacitor and resistor.

Remove the drive sequencer transformer (T1

Remove the

air filter motor wires from the

and T2) wires on TB4—7 and TB4—6 (brown,

filter

terminal

red, or black), insulate, and tie back into the

according to Figure 4-24. Do not remove the

sequencer cable.

interconnecting wires from the sequencer.

4-28

motor

board

and

rewire

Verify that the drive sequencer T1 and T2 wires

BLACK

BLUE

RED

corresponding

input

voltage

pins 6 and 7.

Verify that the line filter A14-D is wired to the

YELLOW

sequencer TB2—4 and the sequencer DCL ac

BROWN OR VIOLET
S

the

400V — yellow,

415 V —violet) are wired to sequencer TB4

ORANGE
4

(380 V — orange,

power connector.

GND

Verify that the resistor assembly (76007863-1)
CP-1377

Figure 4-24

on sequencer TB1—14 and TB1—-17 is removed

and a jumper (84001467-54) is installed be-

Filter Motor Terminal Board Wiring

tween TB1—14 and TB1-17.

(50 Hz/400 V Wye Conversion)

Verify that the wire from sequencer A4TB2—4
10.

is wired to the power transformer terminal

Ensure that the reference phase wire on the

board pin 3 for 400 V or 415 V input voltages,

power transformer terminal board is connected

and to pin 2 for 380 V input voltage.

~ to the tap corresponding to the input voltage

11.

4.6

4.6.1

(TB-3 for 415V and 400V input power, or

Verify that the blower motor is wired according

TB-2 for 380 V).

to Figure 4-24.

Use tape or stick-on labels to mark both the

Verify

sequencer and the drive nameplates with the

(76007662-2, 400 V, 50 Hz) is installed on the

voltage to which the drive has been converted.

drive motor.

4.6.4

POWER VERIFICATION

the

voltage

adapter

plug

50 Hz/230 V Delta Input Power Configuration
1.

60 Hz/208 V Input Power Configuration

that

Verify that the sequencer and drive nameplates
are marked 220V, 230V, or 240 V, 50 Hz.

Verify that the sequencer and drive nameplates

Verify that the drive sequencer T1 and T2 wires

are marked 208 V, 60 Hz.

Verify that the drive sequencer T1

corresponding

and T2

(220 V — brown,

brown wires are wired to sequencer TB4 pin 6

240V — black)

and pin 7.

the

input

voltage

230V —red,

are wired to sequencer TB4

pins 6 and 7.

Verify that sequencer TB2-2 is wired to the

Verify that the line filter A14-B is wired to the

power transformer terminal board pin 2.

sequencer TB2—4 and the sequencer DCL ac
4.6.2

60 Hz/230 V Input Power Configuration
1.

power connector.

Verify that the sequencer and drive nameplates

Verify that the resistor assembly (76007863-1)

are marked 230 V, 60 Hz.

is installed between sequencer TB1-—14 and
TB1-17.

Verify that the drive sequencer T1

and T2

black wires are wired to sequencer TB4 pin 6

Verify that the wire from sequencer A4TB2—4

and pin 7.

is wired to the power transformer terminal
board pin 3 for 230 V or 240 V input voltage,
and to pin 2 for 220 V input voltage.

Verify that sequencer TB2-2 is wired to the
power transformer terminal board pin 3.

Verify that the blower motor is wired as shown
4.6.3

in Figure 4-23.

50 Hz/400 V Wye Input Power Configuration
1.

Verify that the sequencer and drive nameplates

Verify that a 230 V/50 Hz voltage adapter plug

are marked 380 V,400 V, or 415 V, 50 Hz.

(76007662-1) is installed on the drive motor.

4-29

CHAPTER 5
INSTALLING THE RPO4

INTO AN RJP0O4 SUBSYSTEM

5.1

INTRODUCTION

CAUTION

When one or more RP04s are combined with one or more

Ensure that backplane wires are not damaged

RH11

combination is designated as an

when power cables are connected to the back-

RJP04 subsystem. System Diagram E-SD-RP04-0-1 shows

plane. Do not cut AC LO and DC LO wires out

controllers, the

system interconnection, module locations, power wiring,

of the power harness, as they are used for

and single-port and dual-port option data. More complete

power fail conditions on the Massbus and on

details regarding this type of installation can be found in

both Unibus A and Unibus B ports.

the RJP04 Moving Head Disk Subsystem Maintenance

Manual (DEC-11-HRJPA-A-D) and the RP04 Device Con-

After power connections have been made, check for power

trol Logic Maintenance Manual (DEC-00-HRP4M-A-D).

shorts with an ohmmeter. Ensure that all modules are

firmly seated in the proper slots (Figure 5-1). Power up the
5.2

CPU or expander box and measure voltages in accordance

ELECTRICAL

Power cable connections, Unibus cable connections, and

with values listed for the preceding color codes. After this is

Massbus cable connections are described in the following

done, turn the power OFF.

paragraphs.

5.2.1

Power Cable Connections

5.2.2

Unibus Cable Connections

Power is distributed to the two hex-height RH11 modules

The RH11 is a two-port Unibus device capable of accepting

via two power cables that attach to the printed circuit

two Unibus cable systems, designated Unibus A and Unibus

backplane assembly by quick-disconnect tabs. (Refer to

RH11 Wired Assembly Drawing D-AD-7009397-0-0.) The
power cables have Mate-N-Lok connectors on one end to
connect to the power distribution panel located above the

5.2.2.1

backplane, and quick-disconnect tabs on the other end to

connect the RH11 to the processor controlling it. The

connect to the RH11 backplane assembly. The color codes

Unibus A cable

associated

with

the

power

harness

connections

are

follows:

Unibus A Connections — The Unibus A cable slots

enters the RHI1 via slot A1B1 and
connects to the next device via slot A9B9. (Refer to
Module Utilization Drawing D-MU-RH11-0-01.) Connections to slot A1B1 are made via the BC11A Unibus cable if

Harness #1

Harness #2

the RH11

Rows 1-4

Rows 5-9

Otherwise, connection to A1B1 from the preceding device
is made by an M920 Unibus Jumper module. If the next

is the first Unibus A device in the mounting box.

+5V

Red

ACLO(+3 Vto+t5V)

Yellow

device on the Unibus is adjacent, connection is also made

+5V

Red

DCLO (+#3 V to +5 V)

Violet

by an M920 module; if it is not adjacent, connection is

Gnd

Black

LTC (8 V peak-to-peak ac)

Brown

made by a BC11A cable.

Gnd

Black

+15V

Gray

-15V

Blue

+5V

Red

NOTE

+5V

Red

If the RH11 is the last device on Unibus A, an

Gnd

Black

M930 Terminator module is installed in slot

Gnd

Black

A9B9.

UNIBUS

(BUSA)

ouT

(BUSB)

(BUSA)

A IN

(SEE NOTE 1)

(SEE NOTE 2)|(SEE NOTE 2)|(SEE NOTE 3)

M7297

DATA

PARITY

BUS

CONTROL

(PAC)

(BCT)
MODULE

BUFFER

MASSBUS

CONTROL
(DBC)

CEIVER
(MBSA)

MASSBUS | MASSBUS

TRANS-

MODULE

CEIVER
(MBSB)

TRANS-

CEIVER
(MBSC)

G727

M7296

UNIBUS

POWER

DRIVER

(BUSB)

(BUSA)

FAIL

CONTROL
&
STATUS
REGISTERS

(CSR)

NOTES:
1.

MAY BE EITHER M920 (CONNECTION FROM ADJACENT DEVICE) OR

MAY BE M920 (CONNECTION TO ADJACENT DEVICE), M930 (TERMINATION

BC11A CABLE (CONNECTION FROM ANOTHER BOX OR NON-ADJACENT

AT END OF UNIBUS A), OR BC11A CABLE (CONNECTION TO NEXT BOX OR

DEVICE).

NON-ADJACENT DEVICE).

MAY BE M9300 (TERMINATION AT BEGINNING OR END OF UNIBUS B) OR
BC11A CABLE (CONNECTION TO OTHER BUS B DEVICES).

G727 GRANT CONTINUITY MODULE(S) MUST BE INSERTED IN SLOTS D.

n-2384

Figure 5-1

RHI1 Module Utilization

5-2

generally made in systems with multiport memories. When

slot A7B7. If the RH11 is the last device on the bus, the
M930 or M9300 module is installed in slot A7B7 instead of

the Unibus B port of the RH11 is not used, an M9300

the BC1 1A cable.

5.2.2.2

Unibus B Connections — Unibus B connections are

Terminator

module

(with jumper W1

cut) should be

No Processor on Unibus B — If no processor is connected to
Unibus B, an M9300 Unibus B Terminator module must be
selected as an NPR arbitrator. If one RH11 is connected to

installed in slot A8B8 to terminate Unibus B signals into
the RH11. The second M9300 Terminator module should
not be used in A7B7 in order to conserve power. If the
Unibus

B port

Unibus B, the RHI11 is electrically connected at the
beginning of the bus with the M9300 selected to act as an

of the RHI1 is used, connections are

determined on the basis of whether a processor is con-

with the processor are used for bus termination, and the

NPR arbitrator. One M9300 Unibus B Terminator module
is placed in slot A8B8 of the RH11. Jumper W1 of that
module must be cut to enable the arbitration logic.
Connection to other devices on Unibus B, such as memory,
is made via a BC11A cable connected to slot A7B7. The
second M9300 is installed in the last device on Unibus B.
Jumper W2 is removed to terminate the Unibus with no

two M9300 modules supplied with the RH11 are not used.

processor connected.

nected to Unibus B. These connections are described below.

Processor on Unibus B — If a processor is connected to

Unibus B, it is electrically connected at the beginning of the
bus. In this case, the M930 Terminator modules supplied

NOTE

slot ASB8 with a BC11A cable. Connection from the RH11

In this case, an M930 Terminator module can
be substituted for the M9300 Unibus B Terminator in the last device slot. If more than one
RH11 is installed, the user may have extra
M9300 modules as a result of a particular
configuration. Figures 5-2, 5-3, and 5-4 show

to the next device is made via a BC11A cable connected to

typical Unibus configurations.

The M9300 Terminator module may be used as

a substitute for the M930 Terminator module if
the jumpers are selected correctly.

The Unibus B cable connection to the RH11 is made via

RH11

UNIA
IN

UNIB
ou

UNIB
IN

UNIA
ouT

ABO1

ABO7

M9300

ABO9

MODULE

TERM.

(ABOS8)

UNIA

ouT

M930

UNIA
ouT

w2-IN

W3-1IN
SEE

NOTE

UNIBUS A

BEGINNING

END OF

UNIBUS

UNIBUS A
NOTE f:

Install

M930

terminator if last device on UNIBUS A.
11-2220

Figure 5-2 Single-Port Unibus Configuration

5-3

UNIBUS

END
UNIBUS

[
M9300

W1-IN

W2-0UT

We-In

RH11

BEGINNING
UNIBUS

UNIA

UNIB

ouT

ABO1

ABO7

SOLID STATE MEMORY
PDP-11/45

M930

MEMORY
UNIA

ouT

ABO9

W1i-0UT

UNIA

ouT

M9300
ABO8

UNIA

W2-IN

UNIA

ouT

W3-IN
SEE
NOTE

‘\
BEGINNING
UNIBUS A

UNIB

Em——

UNIBUS A

ouT

[

UNIB

UNIBUS A

——:> N

END OF
XNIBUS

NOTE
1:
Install

M930 terminator if

last device on UNIBUS A.
11-2221

Figure 5-3

5.2.3

Dual-Port Configuration — Memory on Unibus B

Massbus Cable Connections

Massbus

connections

8-foot, 40-conductor

the

ribbon

RHI11

Massbus
are made via three

Cable

B — From slot C5DS5S

the next

connector slot, with the edge-marking facing up.

cables (BCO6R-08). These

cables plug into three M5904 Transceivers in the RH11, and

Massbus

are designated Massbus Cables A, B, and C. These cables

connector slot, with the edge-marking facing up.

Cable

C — From slot C6D6 to the next

should be inserted into the modules with the edge-marking
To terminate the Massbus, a 7009938 Terminator Pack

facing the module handles. The other ends of these cables

mate to the input/output connector block assembly on the

assembly should be plugged into the output connector(s) of

connector

the last drive (Figure 5-5). The Massbus cable connections

panel with the edge-marking facing up (per

D-UA-RJP04-A-0). The connections are made as follows:

to the RHI11 are shown in Figure 5-2 and 5-3 for single-port

and dual-port systems, respectively.
NOTE
Massbus Cable

A — From slot C4D4 of the RHI11 to

In some cases, M5903YA transceiver cards may

the righthand side of the connector block (viewed

be used instead of the terminator pack assem-

from the male side, springs at top). The edge-marking

blies;

should face up.

shipped with terminator pack assemblies.

5.4

however,

all units ultimately

will be

PDP-11

MEMORY

M930

BEGINNH&
NIBUS B

UNIBUS B

UNIB
IN

UNIB
ouT

BUS WINDOW
UNIA
IN

PDP-11

RH11

UNIA
ouT

UNIA

END

ABO1

MS300

TERM.

UNIA
IN

——

UNIBUS A

ABOS8

ABO9

wi-IN

UNIB

‘

BEGINNING
ONIBUS A

ouT

W2-ouT
W3-0UT

UNIA
ouT

SEE
NOTE 1

UNIA

UNIBUS

MODULE

MEMORY

UNIA
ouT

M930

UNIB
ouT

UNIB
IN

UNIB
ouT

ouT

Commm—

SEE
NOTE 2

UNIB

| S—

END
UNIBUS

UNIBUS A

NOTES:

1. In this configuration can be replaced by M930.

2. Install M930 terminator if last device on UNIBUS A.
11- 2222

Figure 5-4

524

Dual-Port Configuration — Memory & Processor on Unibus B

ACLO,DCLO

AC LO and DC LO signals from the RH11 power supply
must be connected to the RHI 1. There should be only one

AC LO and one DC LO power fail connection to each
Unibus from the power supply of each mounting box.
(Otherwise, power fail conditions would latch up due to
positive feedback to the power fail logic.) If a device
already mounted in the mounting box to be used for the
RH11 has AC LO and DC LO connections to a Unibus,
remove the M688 Power Fail Driver module for that Unibus

from the RH11. The M688 for Unibus A is located in slot
ES5; the M688 for Unibus B is located in slot E4.

If the configuration is such that Unibus A and Unibus B are

jumpered together and AC LO and DC LO connections are
already made to either Unibus from a device in the

mounting box to be used for the RH11, remove the M638
for the RH11 Unibus connection, whether it is A or B.
Power supply AC LO and DC LO should be disconnected
from all other options mounted in the same box as the
RH11 if they do not need those signals for internal
operation.

5.3

JUMPER CONFIGURATIONS

The

following paragraphs describe the various jumper

configurations on the BCT, DBC, and CSR modules.

RH11

M5904 |

SLOT

RPO4 DISK DRIVE

LAST DRIVE

% | M5903 | 4

%
|M5903
— sLoT

c0o4 | |
%%

M5904
SLOT

CDO5

SLOT

ABO1

]

M5903

ABO2

ON MASSBUS

ABO!

i jaka

SLOT

M5903
SLOT
ABO1

TERMINATOR
PACK ASSY

M5904
SLOT
CDO6

M5903
‘stor
ABO3

M5903
sLoT
ABO1

(7009938)
P

MASSBUS
CABLE
CONNECTORS
NOTES:

3% Flat massbus cable (3) internal to RPO4 cabinet
and to cabinet containing RH11.

¥ ¥ Round massbus cable external

to cabinets.

1. Last drive terminated with 7009938
terminator. pack dssy.
11-2561

Figure 5-5

Massbus Cable System Configuration

The BCT module contains jumpers for register selection,

The jumpers in E3 (D-CS-M7295-0-1, sheet 2) are selected
for the appropriate number of registers (20) in the RJP04

BR level interrupt, NPR latency, vector address, and missed

subsystem.

5.3.1

BCT Module (M7295)

transfer error.

5.3.1.1

Selection — The

RHI1

capable

Slot

Jumper

Jumper In/Out

responding to 30 possible Unibus addresses, with the exact

number dependent on the Massbus device. For the RP04

Disk Drive, the following jumper configuration should be

used (D-CS-M 7295, sheet 2).

Jumper

Address Bit

Jumper In/Out*®

2—15

1-16

Out
Out

3—14

4—-13

5—-12(2)

6—11(4)

Out

7—10(8)

Out

8—9(16)

Out

W35

Out

5.3.1.2

Wé

Out

the RH11 is normally set for the BRS level. This plug is

Out

located in E57 (D-CS-M7295, sheet 7).

5.3.1.3
*Jumper In = Binary 0

BR Level Interrupt — The priority jumper plug for

NPR Latency — Special circuitry is incorporated

on the BCT module to improve NPR latency time for

devices connected to the Unibus. This circuitry is enabled
Jumpers W1—W8 select the block of Unibus addresses to

via jumper W18 (D-CD-M7295-0-1, sheet 7). When the

which the RH11/RP04 responds. The standard addressing

jumper is left in, the NPR latency feature is enabled. Not all

block assigned is 776700—776746.

PDP-11 processors will work with this special feature.

performing DATI operations; if W1 is removed, the PA and
PB parity lines of Unibus B are used as data bits 16 and 17,

53.1.4 Bus Grant — If there are no small peripheral
controllers installed in slots C7—F7, C8—F8, and C9—F9,
G727 Grant Continuity modules must be installed in slot
D7, D8, or D9. These modules merely continue the Bus

respectively. Jumper W2 serves Unibus B in the same
manner as W1 serves Unibus A. Both jumpers are normally

Grant signals to the next device on the Unibus.

left in.

5.3.2.3 Start Counter Jumpers — Various Silo capacities

Vector Address Jumpers — The interrupt vector

5.3.1.5

are jumper-selectable before a write operation onto the disk
drive is started. For RJPO4 operation, jumper E66, pins
1—16, which selects the full 64-word capacity, should be
connected (D-CD-M7294-0-1, sheet 9).

transferred to the processor is jumper-selectable via jumpers

W11-W17, representing vector bits 2—8, respectively. The
RJP04 subsystems are assigned a vector address of 000254,
with the following jumper configuration:

Jumper

Vector Bits

Jumper In/Out*

Wil

W12

5.3.3 CSR Module (M7296)

The CSR module contains a jumper (W1 on
D-CS-M7296-0-1, sheet 2) to allow for Unibus A selection
only. This jumper overrides the ability of the program to

W13

Out

select Unibus B data transfers. The jumper is normally

w14

removed.

W15

Out

W16

\¥

W17

Out

5.4 RH11 INSTALLATION PROCEDURE

This procedure should be performed twice when installing
RJP04-BA or RJP04-BB subsystems.

*Jumper In = Binary 1

— Jumper W19 (D-CD-M7295-0-1,
5.3.1.6 MXF Jumper
sheet 9) is used to disable detection of MXF errors and is
used during special maintenance procedures. W19 is nor-

broken wires.

mally left in.

5.3.2

DBC Module (M7294)

Unibus parity, and start counter capacities.

NPR

Cycle

Selection

Jumpers — Two jumpers

revision and remove and check all RH11

Mount the RH11 backplane assembly in the

appropriate mounting box using four 8/32” X
1’ Allen-head screws.

select the type of cycle to be implemented when perform-

ing NPRs. Jumper E66 (3—14) (D-CS-M7294-0-1, sheet 2)

selects the RH11 to perform one memory reference for
each NPR request; this jumper is removed in the RJP04

subsystem to allow back-to-back memory cycles to occur.

Jumper E66 (2—15) takes advantage of dedicated Unibus B
systems (those in which the RH11 is used exclusively as a
Unibus B master) by allowing the RH11 to transfer
complete consecutive blocks of data without giving up the

Connect the two power harnesses to the RH11
as described in Paragraph 5.2.1. Ensure that
Mate-N-Lok connectors are seated firmly in the
power distribution panel located on the chassis
above the backplane.

Check the RH11 backplane again for bent pins
and shorted wires.

Unibus; to implement this feature, both this jumper and
E66 (3—14) must be cut.

5.3.2.2

Check the backplane for the current wire-wrap

modules for current ECO revisions.

The DBC module contains jumpers for NPR cycle selection,

5.3.2.1

Visually check the RH11 backplane assembly
for bent pins by sighting along the rows of pins
from two directions. Also check for pinched or

Power-up the CPU or expander box and check

Check that the wires supplying AC LO and DC

Unibus Parity Jumpers — The RH11 option can be

selected for 16-data-bit transfers (plus two parity bits) or

18-data-bit transfers. Unibus A and Unibus B can each be
W2
and
W1
jumpers
via
individually
selected
allows
W1
jumper
in,
left
If
8).
(D-CS-M7294-0-1, sheet
parity error code detection on Unibus A when the RH11 is

all voltages, then power-down.

LO signals from the power supply are con-

nected to the RH11, as described in Paragraph
5.2.4.

5-7

Verify and/or select the jumper configurations

-BB subsystem is designated as controller BX,

in the RH11

where X is the same subsystem number as the

according to Paragraph 5.3 and

drawing D-CS-M7295-0-1.

associated controller A.

Verify that all modules are placed according to

Example: Two RHI11 controllers are mounted

the

RH11

Module

Utilization

List

(D-MU-RH11-0-1).

the

same

cabinet,

one for each of two

RJP04-AA subsystems. Each RH11 uses one

input/output connector block on the connector
10.

Verify that Unibus cable connections are made

panel;

according to Paragraph 5.2.2.

second is A2. Later, an RJP04-BA subsystem is

the

installed

11.

first is called controller Al, the
with

its

two

RHI1

controllers

Mount an input/output connector block assem-

mounted in the same cabinet. The remaining

bly (7009861) to an RJP04 connector panel

two slots on the connector panel are used, with

(7412379)

one being labeled A3 and the other B3.

with

four

4/40”

screws

(9008042-8).
12.

Verify

that

two pressure-sensitive labels are

applied to the connector panel for each input/
output

connector

block

CBA

assembly

(E-UA-RJP04-A-0). Label 1 is applied above the
input/output connector block assembly, and

Label 2 (3612116-01)

Label 2 is applied below it.

This label simply shows the relative positions of
the flat Massbus cables A, B, and C.

Controller

13.

AB1234

of the cabinet containing the RH11, using four

10/32” Tinnerman nuts (9006586) and four
X
0.38”
Truss-head
screws

Label 1 (3612116-00)

10/32>

(9006071-3). (Refer to D-UA-RJP04-A-0.)

The second line of Label 1 must be marked so
that only one letter and one number are visible.
The

single

controller

(RH11)

Mount the connector panel at the bottom rear

used

14.

Verify

that

Massbus

cable

connections

are

according to Paragraph 5.2.3.

RJP04-AA or -BB subsystem, as well as the first

controller used in an RJP04-BA or -BB sub-

15.

system, is referred to as controller A. If it is the

Clean the air filters at the top of the mounting
cabinet, if necessary.

first subsystem using the connector panel, it is
designated controller Al (etc., up to controller
A4). The second controller in an RJP04-BA or

l6.

Check mounting cabinet fans for proper operation.

5-8

CHAPTER 6

RJP04 FIELD ACCEPTANCE

PROCEDURES AND DIAGNOSTICS

6.1

6.2.3

INTRODUCTION

formance

of the

RP04 Disk Drive

Pack-Attributable Errors

An error caused by imperfections in the recording surface is

Field acceptance testing is intended to demonstrate per-

regarded as pack-attributable, or media dependent. If the

and/or the RIJP04

subsystem to the customer prior to his acceptance.

imperfection is less than 11 bits long, it is ECC-correctable

6.2

will appear as a hard

and will appear as a soft error. If it is longer than 11 bits, it
ERROR DEFINITIONS/RATES

error.

On a given pack, pack-

The RPO4 contains three registers to display the various

attributable errors will always appear at the same cylinder,

error

sector, and track addresses. The definitions of hard and soft

conditions

possible.

Error register #1

(RHER 1)

indicates the operational error related to command and

errors in Paragraphs 6.2.1 and 6.2.2 apply only to randomly

control; error registers #2 and #3 (RHER 2, RHER 3)

~ distributed errors, and do not take into account errors that

indicate drive error conditions. Two bits of RHER 3 (SKI

are pack-attributable. Imperfections in the pack surface

and OCYL) indicate seek errors and are used to calculate

may be found by mapping the pack using the formatter

the seek error rate (Paragraph 6.2.4). Four bits of RHER 1

program.

(DCK, HCRC, HCE, and ECH) indicate data errors; the
remaining bits of RHER
1 indicate command and control

6.2.4

errors. Table 6-1 lists indications of the various error types

Any positioning operation that is not completed within a

Seek Errors

and their explanations.

specified time (85 ms for SEEK commands, 500 ms for
RECALIBRATE commands, and 10 ms for OFFSET and

RETURN
6.2.1

minates

Hard Errors

with

CENTERLINE commands) or that terthe positioner in

an incorrect location,

Any failure to read data correctly after a complete recovery

constitutes a seek error. The allowable error rate for seek

sequenceTM with ECC enabled constitutes an irrecoverable,

errors is 1 error per 10° seek operations.

or hard error. Errors that are not ECC-correctable include
bursts greater than 11 bits in length and isolated dropped

6.3

bits (separated by more than 11 bits) within a sector. The

allowable error rate for hard errors is 1 error per 10" ? bits

The RJP04 Field Acceptance Test is designed to demonstrate the performance of the RP04 Disk Drive when used

read.

with an RH11 controller.

6.3.1
6.2.2

RIP04 FIELD ACCEPTANCE TEST

Operational Checks, Single Controller

When all installation procedures have been completed, the

Soft Errors

Any failure to read correctly on the first try, data that is

tests

then read successfully during a recovery sequence, consti-

performed. The total time required to run these tests, in the

tutes a recoverable, or soft error. The allowable error rate

absence of failures, is 3.7 hours per drive. Diagnostics are

for soft errors is 1 error per 10° bits read.

described in Paragraph 6.4.

*A complete recovery sequence consists of 28 retries, 16 of them at
the nominal head position, and 2 each at offsets of +400, +800, and
+1200 microinches. The first release of the DEC PDP-11 operating
system does not include offset capability.

6-1

described in

the

following paragraphs

should be

Table 6-1
BIT SET

Bit

Error Type

Soft

HCE

RHER 1

HCRC

RHER 1

HCRC

RHER 1

Explanation

Sector Count Field/Desired. Sector Compare fails due
to CRC failure.

Soft

Sector Count Field matches desired sector field but

there is CRC error.
HCRC

RHER 1

FER

RHER 1

Soft

Format bit in first header word incorrect.
NOTE: FER without HCRC indicates wrong format

pack mounted.
DCK

RHER 1

Soft

Error detected during Read operation by examination

of ECC bytes; correctable by retry sequence.

DCK

RHER 1

ECH

RHER 1

Hard

Error detected which is ECC uncorrectable through
28

retry

sequence

(16

retries

nominal

head

position and 12 with head offset).
SK1

RHER 3

Seek

SEEK operation fails to complete within 85 ms

of initiation.
2.

RECALIBRATION operation fails to complete

within 500 ms of initiation.
3.

OFFSET or RETURN to CENTERLINE opera-

tions fail to complete within 10 ms of initiation.

SKI

RHER 3

OCYL

RHER 3

HCE

RHER 1

Seek

Positioner has

drifted off cylinder subsequent to

completion of positioning operation.
Seek

Sector Count Field (RHLA) does not match Desired

Sector Field (RHDST) and there is not a CRC error.
This error is not caused by a positioner failure: It is

due to a DCL failure. Therefore, HCE alone indicates
an RP04 Seek Error and not a DEC 733 Drive Seek

failure.

6-2

Diskless Controller Test, Part I (Static 1A) (MAINDEC-11-

Mechanical Read/Write Test (MAINDEC-11-DZRPK)

DZRPS)

Run Procedure:

Run Procedure: Run two passes, using default parameters.
1.

One pass of all tests, using default parameters.

Ten passes of tests 0—6.

Errors Allowed: None
Error Recovery Procedure: Correct problem and restart

Errors Allowed: Only pack-attributable errors. (The same

acceptance on failing drive.

pack should be used for this test that was used for the test

in the preceding paragraph.)

Approximate Run Time: 5 minutes/drive
Diskless Controller Test, Part II (Static 1B) (MAINDEC-11-

Error Recovery Procedure: Correct problem and restart

DZRPT)

acceptance on failing drive.

Run Procedure: Run two passes, using default parameters.

Approximate Run Time: One hour, 15 minutes/drive
Errors Allowed: None
Error Recovery Procedure: Correct problem and restart

Multidrive Exerciser (MAINDEC-11-DZRPN)

acceptance on failing drive.

Run Procedure: Run all drives, using default parameters,

until 6.25 X 107 words have been transferred on all drives.
Approximate Run Time: 10 minutes/drive
Errors
Functional

Controller

Test,

Part

(Static

Allowed: One

attributable.

2A)

(Use

the

soft

error

that

same

pack

that

was used

not

pack-

for

preceding test.)

(MAINDEC-11-DZRPU)
Run Procedure: Run two passes, using default parameters.

Error Recovery Procedure: Drop failing drive from test.
Continue test on remaining drives. Correct problem and

Errors Allowed: Only pack-attributable errors.

restart acceptance on failing drive.
Error Recovery Procedure: Correct problem and restart

Approximate Run Time: 45 minutes/drive

acceptance on failing drive.

Approximate Run Time: 5 minutes/drive
DEC-X-11
Functional

Test,

Controller

Part

(Static

2B)

Run Procedure: Run configured for system with default

(MAINDEC-11-DZRPV)

parameters for one hour.

Run Procedure: Run two passes, using default parameters.

Errors
Errors Allowed: Only pack-attributable errors.

Allowed: Two

system soft

errors

that

are not

pack-attributable. (Use the same pack that was used in the

preceding tests.) Data Late errors (DLT) are to be expected
Error Recovery Procedure: Correct problem and restart

on heavily loaded systems and, as such, should not be

acceptance on failing drive.

considered as errors.

Approximate Run Time: 5 minutes/drive

Error Recovery Procedure: Drop failing drive and continue
test

Formatter Program (MAINDEC-11-DZRPL)

on remaining

drives.

Correct

problem and restart

acceptance on failing drive.

Run Procedure: Run according to Table 6-2.

6.3.2

Errors Allowed: Pack-attributable errors only.

Operational Checks, Dual Controller

When all installation procedures have been completed for a
Error Recovery Procedure: Correct problem and restart

dual-controller system, the tests described in the following

acceptance on failing drive.

paragraphs should be performed. The total time required to

Approximate Run Time:

drive.

run these tests, in the absence of errors, is 4.0 hours per
15 minutes/drive

6-3

Table 6-2

Format (MAINDEC-11-DZRPL) Run Procedure
DRV 0

DRV 1

DRV 2

DRV 3

DRYV 4

DRV 5

DRYV 6

DRV 7

Default

Write

Option (1)

Check (1)

Write

Default

Write

Check (1)

Option (2)

Check (2)

Write

Default

Write

Check (2)

Option (3)

Check (3)

Write

Default

Write

Check (3)

Option (4)

Check (4)

Write

Default

Write

Check (4)

Option (5)

Check (5)

Write

Default

Write

Check (5)

Option (6)

Check (6)

Write

Default

Write

Check (6)

Option (7)

Check (7)

Write

Default

Check (7)

Option (8)
Write

Check (8)

Diskless Controller Test, Part I (Static 1A) (MAINDEC-11-

Error Recovery Procedure:

DZRPS)

acceptance on failing drive.

Run Procedure:

Correct problem and restart

Run two passes, using default parameters

(both ports).

Approximate Run Time: 20 minutes/drive

Errors Allowed: None
Error Recovery Procedure: Correct problem and restart

Functional

acceptance on failing drive.

(MAINDEC-11-DZRPU)

Controller

Test,

Part

(Static

2A)

Run Procedure: Run two passes, using default parameters

Approximate Run Time:

10 minutes/drive

(both ports).

Diskless Controller Test, Part II (Static 1B) (MAINDEC-11-

Errors Allowed: Only pack-attributable errors.

DZRPT)
Run Procedure: Run two passes, using default parameters

Error Recovery Procedure:

(both ports).

acceptance on failing drive.

Errors Allowed: None

Approximate Run Time: 10 minutes/drive

6-4

Correct problem and restart

Functional

Controller

Test,

Part

(Static

2B)

Mechanical Read/Write Test (MAINDEC-11-DZRPK)

(MAINDEC-11-DZRPV)

Run Procedure:

Run Procedure: Run two passes, using default parameters

(both ports).

One pass of all tests, using default parameters

(one port only).
Errors Allowed; Only pack-attributable errors.

Ten passes of tests 0—6 (one port only).

Error Recovery Procedure: Correct problem and restart
acceptance on failing drive.

Errors Allowed: Pack-attributable errors only. (Use the

Approximate Run Time:

test.)

same pack for this test that was used for the preceding
10 minutes/drive

Dual Controller Logic Test, Part I (MAINDEC-11-DZRPP)

Error Recovery Procedure: Correct problem and restart

Run Procedure:

acceptance on failing drive.

Install

dual

controller

option

test

Approximate Run Time: One hour, 15 minutes/drive

cable

(7010507-02).

Multidrive Exerciser (MAINDEC-11-DZRPN)
2.

Run two passes, using default parameters.

Run Procedure: Run all drives, using default parameters,

until 6.25 X 107 words have been transferred on all drives.
Errors Allowed: Pack-attributable errors only.

(Run both ports simultaneously.)

Error Recovery Procedure: Correct problem and restart

Errors Allowed: One soft error, not pack-attributable. (Use

acceptance on failing drive.

the same pack for this test that was used for the preceding

tests.)
Approximate Run Time: 5 minutes/drive

Error Recovery Procedure: Drop failing drive from test.
Dual Controller Logic Test, Part Il (MAINDEC-11-DZRPQ)

Continue test on remaining drives. Correct problem and

Run Procedure:

restart acceptance on failing drive.

Install

controller

dual

option

test

Approximate Run Time: 45 minutes/drive

cable

(7010507-02).
2.

DEC-X-11

Run one pass, using default parameters.

Run Procedure: Run configured for system, using default

procedures, for one hour (both ports).

Errors Allowed: None
Error Recovery Procedure: Correct problem and restart

Errors

acceptance on failing drive.

pack-attributable. (Use the same pack that was used for the

Allowed: Two

system soft

errors

that

are not

preceding tests.) Data Late errors (DLT) are to be expected
Approximate Run Time: 5 minutes/drive

on heavily loaded systems and, as such, should not be

Formatter Program (MAINDEC-11-DZRPL)

at a later date.

considered as errors. Engineering guidelines will be available
Run Procedure: Run according to Table 6-2 (one port

Error Recovery Procedure: Drop failing drive and continue

only).

test

remaining

drives.

Correct

problem and restart

acceptance on failing drive.

Errors Allowed: Pack-attributable errors only.
Error Recovery Procedure: Correct problem and restart

6.4

acceptance on failing drive.

The diagnostic programs employed with the RJP04 sub-

DIAGNOSTICS

system are described briefly below. Refer to the applicable
Approximate Run Time:

15 minutes/drive

diagnostic operating procedures for detailed information.

6-5

6.4.1

Test Programs

6.4.2

MAINDEC-11-DZRPS

and MAINDEC-11-DZRPT

RP04

MAINDEC-11-DZRPN Multidrive Exerciser — This program
exercises one to eight RP04 Disk Drives attached to the
same RH11. If two or more RPO4s are being exercised,
operations may be overlapped so that one drive performs a
data transfer or write-check operation while others perform
seek/search operations. Performance of each drive is monitored by the program, so that a drive which exceeds a
preset number of errors in any of several categories is
automatically deassigned, unless the operator chooses to
override that feature. Performance statistics for each drive
being exercised are reported on request from the operator
or automatically at intervals determined by the operator.
All data transfer commands (Write Data, Write Header and
Data, Read Data, and Read Header and Data) are used, as
well as Write-Check Data and Write-Check Header and Data
commands. Recalibrate and Read-In Preset commands are
used at startup and drive initialization; Recalibrate, Offset,
and Return to Centerline commands are used during error
processing. Program/operator communication is via the

Diskless Controller Test, Parts I and II (Static 1A and
1B) — This program tests the RH11 and the DCL portion of
the RP04 Disk Drive. The DCL must be plugged into the

mass device level interface (MDLI) connecting to the drive
assembly. This program does not use the disk surface or any

signals from the MDLI. If the disk is powered up, it must be
in the Heads Unloaded position. A successful run (no
errors) of this diagnostic indicates that the DCL logic is

working properly; the logic controlling mechanical commands is not tested by this diagnostic. All data commands
use the Maintenance register in the wraparound mode.
MAINDEC-11-DZRPU

and MAINDEC-11-DZRPV RP04

Functional Controller Test, Parts I and II (Static 2A and
2B) — This diagnostic tests the DCL portion of the RP04

by exercising the disk surface and the mechanics of the
drive to prove proper operation of the subsystem. A disk
pack (which need not be formatted) with no vital information written on it is necessary to run this diagnostic. A

teletypewriter, which also normally reports errors, unless a
line printer is available. Program options are selected by
switch register settings. All commands, data patterns, and
data buffer sizes are selected randomly by the program, as

successful run (no errors) indicates that the DCL circuitry

works properly while not connected to the rest of the
subsystem. This test should be run after the Diskless
Controller Test has been run successfully.

are the addresses (cylinder, track, and sector) for each
operation. At completion of each operation, the program
checks the RH11. This program requires data packs created
by the Formatter Program (below), by the Mechanical
Read/Write Test (above), or by the Data Pack Generation

MAINDEC-11-DZRPK Mechanical Read/Write Test — This
program contains 15 tests numbered from 0—165. Tests
0—6 use a Read Header and Data command to read the
cylinder, track, and sector information from the header; the
tests

then

command of the Exerciser Program.

check for validity, ensuring that the seek

operation functions

System Exerciser Programs

properly. Tests 7—12 measure the

rotational speed, the one-cylinder seek, the average seek,
and the maximum seek times to ensure that they are all

within the specified tolerances. Tests 13 and 14 ensure that
6.4.3

the sector and track addressing circuitry is working pro-

perly. Test 15 ensures that the data storage and retrieval

Utility Programs

MAINDEC-11-DZRPL Formatter Program — This program
is designed to write and verify header and data information
on all possible disk pack addresses in order to test the
retention of the recording surfaces. The format is main-

capabilities are operative. Test 16 is used to stress and
check the read/write and servo systems. The program starts
by identifying itself and determining that all drives are
available for testing; it then tests them in numerical order,

tained on a basis of 411 cylinders, 19 tracks per cylinder,
and 22 sectors per track. The program formats the disk
pack on the assigned drive one track at a time. The data
fields are written with the selected pattern; key words are
written with Os. Each track is verified with a Write-Check
command immediately after it is written. The first and last
cylinder and track addresses, inclusively, determine the

beginning with the lowest numbered. One pass (tests 0—15)
is performed on each drive, with the number of the tested
drive typed at the beginning of the pass. An End of Pass
message is typed at the completion of each pass; after all
drives have been tested, an End of Test message is typed.

MAINDEC-11-DZRPP and MAINDEC-11-DZRPQ DualPort Logic Test (Parts I and II) — This program, which

portion of the pack to be formatted (no smaller than a
single track). Write-check errors are reported when they are
detected. If an error is detected, the sector must be

requires a special adapter cable, checks the dual-port logic
in the DCL portion of the RP04.

6-6

rewritten and verified by two consecutive successful tests

Move the positioner in the opposite direction in

before being considered usable again. Sectors that cannot

increments of 25 microinches until the sign

be written correctly twice, after an error, are declared by

change bit changes value; store the offset value.

the program to be unacceptable. After the last track has

been formatted and verified, the header of track O and

Offset the positioner to —1200 microinches and
repeat steps 2 and 3.

sector O of each cylinder is read and compared by the
software to isolate possible positioner errors that might

have

occurred

during

formatting

(e.g., failure of the

Average the two sign change offset values and

positioner to advance to the next cylinder, or advancement

report if the selected head is misaligned by

of the positioner past the desired cylinder).

more than *150 microinches for cylinder 245
or +35 microinches for cylinders 4 and 400.

MAINDEC-11-DZRPM Head Alignment Verification Pro-

Repeat steps

cylinder

gram — This program checks head alignment at cylinder

245

through 5 for all heads at
for heads O and 18 at

and

cylinders 4 and 400.

245, heads 0—18, and at cylinders 400 and 4, heads O and
18; it also reverifies alignment of cylinder 245, heads 0—18.

The program will notify the operator if any head is out of
alignment by more than the specified amount.

Head alignment is checked as follows:

Offset the positioner to +1200 microinches.

MAINDEC-11-DZRPO

Store the sign change bit.

language.

Peripheral

Test

Generator

Pro-

gram — This program is a modified form of FOCAL-11, and
allows the user to write RP04 programs in the FOCAL-11

6-7

CHAPTER 7

INSTALLING THE RPO4
INTO AN RHP04 SUBSYSTEM

7.1

INTRODUCTION

7.2

ELECTRICAL

When one or more RP04s are combined with one or more

Power cable connections and Massbus cable connections are

RHI10 controllers, the

described in the following paragraphs.

combination is designated as an

RHP0O4 subsystem. The Massbus interface and all channel

bus, I/O bus, and Massbus operations that apply to the

7.2.1

RH10/RS04 are described in detail in the RHI10 Massbus

Power is distributed within an RHP04 subsystem by means

Controller Maintenance Manual and also apply to the RP04.

of the self-contained RH10 power supply and a DEC Type

Power Cable Connections

The RP04 has 16 Massbus registers; Figure 7-1 shows the

857 Power Control. The +5 Vdc and -15 Vdc requirements

formats

of the system are provided by DEC Type 742 Power

for

all

RP04

Massbus

registers

an RHPO04

subsystem.

Supplies; the +15 Vdc requirement is provided by a DEC
Type 783 Power Supply. Power is applied to the subsystem

RP04 Massbus commands are as follows:
Octal Code

as follows:

Command

Insert

the

RP04 power plug into

the

un-

switched side of the 861 Power Control.
01

NO OP

UNLOAD

SEEK

(3-wire) into J1 of the drive, and the output

RECALIBRATE

remote power cable into J2, if applicable.

DRIVE CLEAR

Connect

the incoming remote

power

cable

RELEASE

OFFSET

the first drive; otherwise, connect the incoming
4-wire power sequence cable to J3.

RETURN TO CENTERLINE

READ IN PRESET

Connect the power sequence into J3 if this is

PACK ACKNOWLEDGE

connection need be made to J4; otherwise, a

If this is the last drive, or the only drive, no

WRITE DATA

4-wire sequence cable is output from J4 to J3

WRITE HEADER AND DATA

of the next drive. Part numbers are:

READ DATA

READ HEADER AND DATA

70-08288

J1,J2 Cable, 3-wire

70-09490

J3 Jumper Plug, 1st device

70-09491

J3, J4 Cable, 4-wire

These command codes may be set in the last two octal

digits of the switch panel, and are displayed in the CR

Turn SWI1 to REMOTE and turn the circuit

FUNCTION CODE lights. Figure 7-2 represents a simplified

breaker ON. When the CPU is turned ON, all

block diagram showing typical cable types and connections

drives (if multidrive) will power sequence up,

for an RHPO4 subsystem.

one at a time.

7-1

Fs | Fa | F3 | F2 | Ft | (GO
FO

DVA

DRCR
00

DIB REG BIT #

DCL BIT #

C15

Ci4

Ci3

Ci2

Ci1

CiO

CO9

cO8

<CO7

CO6

CO5

CO4

CO3

CO2

COf

COO

ATA | ERR | PIP | MoL | WRL | LsT | PeM | OPR | DRY | vv | DE1 | DL64 | GRV | DIGB|

DF20|

DF5

DRSR Of

R/W

THESE BITS SHOULD BE ZERO IF HD LD OK

pck | unT | opT | oTE | wLe | TAE | AOE

DRMR 03

DETET | DETET

*DRER1

SYNC

BYTE

CNT

|HCRC|

ZERO | DATA
DETET
EV

TA
16

| TA
8

NBA | TAP | MOH

DRTR 06

A
4

| sN | SN

| 32

*DRER3

| SA

| sA

| sc

| ExT | ExT | EXT | EXT | EXT | EXT

| sn

| sN

| snN

| 24

J 4

| 22

37d peg.

| sn

| oF

| ofF

¥*%

| o4

| o2

| sWN

| ot

LOW ORDER DIGIT
| ofF
*

| ofF
*

| oc

{ oc

| oc

cc
9

| cc
8

cc
7

| cc
6

| cc
5

| cc
4

| cc
3

| cc
2

PLU | 30v | IXE | NHS | MHS

SECOND LOWEST DEC.

oT | oT
| o2

R/W

| sc

DT
| 03

| sA

R/W

| sc

DT
| oa

{

| 05

op | ECL | HCI

@NCS

| o6

*DRER2 14

| o7

DRDC 12

DRCC

| TA

FMT

CNG

HIGH ORDER (4'M) DEC.
SIGN

R/W

opT | ot | oT | OT

| TA

DMD

080

DRSN 10

DRLA O7

DROF

ECC
EV

ATTN | ATTN

*DRAS 04

DRDA 05

R/W

HCE | ECH | WCF | FER | PAR | RMR | ILR | ILF

| oF
#*

| oc

oF
+*

cc
i

ocC

AcL | ocL

ois

| UNS

ERR |

VUF | PSU

DREC1 16

(POS)

DREC2

(PAT)
GUARANTEED ZEROS

* INDICATES CLEARED BY MSB INT OR DR CLR

®* UARDWIRED FOR SINGLE PORT

Figure 7-1

10-1369

RPO04 Massbus Registers

7-2

R/W

cc
0

|wRU | FEN | TUF | TDF | MSE | csu | wsu | CSF | wcu

oCcYL | SKI

R/W

7.3

t MEMORY BUS

RH10 MAINTENANCE PANEL

The RH10 contains a maintenance panel that can be useful

for off-line troubleshooting of an initial installation before

DF10
DATA

running dedicated diagnostic programs. Most cable

CHANNEL

and

DCL problems can be found and repaired in this manner.
CHANNEL
BUS

(BC 10-P)

Bus

*=-1-

RrHIO

4-+1/0

BUS

used to resolve these problems.) The following examples

CENTRAL

(BCl0-y, BC 10-K)
CHANNEL

(MAINDEC-10-DCRPF, discussed in Chapter 8, can also be

KA/KI
10

I/0 BUS

PROCESSOR

show how the maintenance panel can be used to check the
RP0O4 configuration.

DEVICE

NEXT DEVICE

MASSBUS

CABLES (BC 06-S)

Example 1 — Initial Hookup

1.
RPD4

RPO4

|«

Place the LOCAL/REMOTE switch to LOCAL,
with all other switches OFF.

UP TO 8 DEVICES

Start

drive(s)

and

ascertain

that the

CON-

TROLLER SELECT switch points to the correct port. Wait for READY to come ON.
RPO4

3.
CP-1464

Figure 7-2

RH10/DF10/RP04 Cable

Interconnection Diagram

Deposit 01000N0O000OO in the switches (with N
the number of the drive to be tested). Read

Ensure that phasing is correct by noting that

Press CLEAR, then press START.

The DIB register data should be 010600 [start-

the pack spins in a counterclockwise direction.

ing with bit O as the first and total octal digit

If not, reverse the phases in the power box.

(Figure 7-1)]. If the DIB register data is not

When preceding steps have been completed, the

ON, the drive did not recognize the command.

RPO4

In any case, the cables and drives in the chain

correct, check the DIB CBTO light. If this is
7.

physically

mounted.

Refer

the

acceptance procedures in Chapter 8.

are suspect. If problems exist, power down the

drives (by setting CB1 to OFF) to eliminate
7.2.2

DCL faults and investigate cable/transceiver

Massbus Cable Connections

The RP04 connects to the RH10 by means of a round

problems using one drive.

Massbus cable assembly (BC06S). Flat cable is used within
the DCL from the round cable transition connector up to

NOTE

the M5903 standard Massbus transceiver modules in the

The terminators do not require power to

DCL. Two round cable connection paths exist; one for

operate.

input from the previous RH10 or RP04, and one for output
to the next device. If another drive is to follow, route a

BCO6S round Massbus cable assembly out through the rear

the

response

00400N000021

drive. Terminate the last drive in the subsystem by a

read-in preset command.

termination

block

zero-insertion-force

was

of the drive through the left cable clamp and into the next

the

correct,

switches.

deposit

This is

(70-09938), which is installed via a
connector

to the

final round

cable

Press CLEAR, then press START.

Repeat steps 3 and 4.

connector block.

NOTE

CB1 may be OFF in the terminating drive, yet
the Massbus will operate.

The DIB Register Data should be 010700. The
VOLUME VALID bit is now set.

7-3

10.

If the data is not correct, set the RECYCLE
switch

and

repeat

steps

and

Deposit 05400N000000 in the switches. This is

a set to zero of the track and sector address.

(Dynamic logic cannot be observed with the

When

oscilloscope.)

executed following every Read.

Example 2 — Read Data
1.

Execute steps 1—4 of Example 1.

recycling,

this

DIB

command is re-

Press START; do not press CLEAR.
Deposit 40400N000071 in the switches.

Deposit 40400N000071 (read data command)

10.

in the switches.

Set RECYCLE to ON, and press START. The

drive will now continually read cylinder, track,
sector 0, and can be examined with an oscillo-

Press CLEAR, then press START.

scope. If the entire disk is to be read, omit steps

The indicator panel should show both DONE

through the entire disk.

7 and 8, and the RH10 will automatically move
and NOT BUSY to be ON. DR EXC should be

OFF, and DBTO should not be set. RUN should
be OFF, and FIN EN should be ON. DBTO

indicates that the DCL failed to respond to the
command. If DBTO is set, go to Example 3

(Recycle Read) to set up an oscilloscope loop.

Example 4 — Write Data

with all other switches OFF.

CR CBTO should be OFF.
5.

Deposit 020000NO00000 in the switch panel.

Press START; do not press CLEAR.

The

contents

of Error

are now

Press START.

The indicator panel should show both DONE

displayed. Analyze this data, referring to Figure

and NOT BUSY as being ON. DR EXC should

7-1.

be OFF, and DBTO should not be set. Debug in
accordance with Examples 2 and 3, but use the

Repeat steps 6—8, using 14 and then 15 as the

Write

first two digits, to read Error Registers 2 and 3.

Function code (61) where applicable.

RUN should be OFF, and FIN EN should be

ON.

Example 3 — Recycle Read

Press CLEAR, then press START.
Deposit 40400N000061 in the switches.

Place the LOCAL/REMOTE switch in LOCAL,

The data in the Data Buffer lights was written

onto the drive (zeros, in this case).

with all other switches OFF.
Deposit 00400N000021 in the switches.

To set a data pattern into the Data Buffer for
writing, set

the switches to 50400NPPPPPP

(where P is the pattern).

Press CLEAR, then press START.
Deposit 01000N0OOOOOO in the switches.

Deposit 00400N000021 in the switches.

If DR EXC is set, proceed with the subsequent
steps.

Place the LOCAL/REMOTE switch in LOCAL,

Press START, and repeat steps 4 and 5.

Press START.

NOTE

Check

the

DIB

Data

for

010700.

(Steps 4, 5, and 6 are for continuity only.)

Do not press CLEAR; this will erase the
error.

7.4

Ensure that the power cable is firmly attached
to the system backplane assembly (RP04).

VISUAL INSPECTION

Before the acceptance testing is performed, the following

visual inspections should be made:
1.

Clean the air filters at the top of the cabinet, if

Verify that all modules are configured accord-

necessary.

ing to the RH10/RP04 Module Utilization List.
Ensure that all modules are firmly seated in the

Ensure that all Massbus cables are properly

system backplane assembly.

terminated and firmly seated.

Inspect the backplane wiring for broken wires

Check the cabinet fans for proper operation.

or damaged pins; repair or replace as needed.

7-5

CHAPTER 8
RHPO4 FIELD ACCEPTANCE

PROCEDURES AND DIAGNOSTICS

8.1

INTRODUCTION

8.2.3

Field acceptance testing is intended to demonstrate performance

of the

Pack-Attributable Errors

An error caused by imperfections in the recording surface is

RP04 Disk Drive and/or the RHPO4

regarded as pack-attributable, or media dependent. If the

subsystem to the customer prior to his acceptance.

imperfection is less than 11 bits long, it is ECC-correctable

8.2

will appear

and will appear as a soft error. If it is longer than 11 bits, it

ERROR DEFINITIONS/RATES

a hard

error.

On a given pack, pack-

The RP04 contains three registers to display the various

attributable errors will always appear at the same cylinder,

error

sector, and track addresses. The definitions of hard and soft

conditions

possible.

Error register #1

(RHER 1)

indicates the operational error related to command and

errors in Paragraphs 8.2.1 and 8.2.2 apply only to randomly

control; error registers #2 and #3 (RHER 2, RHER 3)

distributed errors, and do not take into account errors that

indicate drive error conditions. Two bits of RHER 3 (SKI

are pack-attributable.

and OCYL) indicate seek errors and are used to calculate

may be found by mapping the pack using the formatter

Imperfections in the pack surface

the seek error rate (Paragraph 8.2.4). Four bits of RHER 1

program.

(DCK, HCRC, HCE, and ECH) indicate data errors; the
remaining bits of RHER
1 indicate command and control

8.2.4

errors. Table 6-1 lists indications of the various error types

Any positioning operation that is not completed within a

and their explanations.

Seek Errors

specified time (85 ms for SEEK commands, 500 ms for
RECALIBRATE commands, and 10 ms for OFFSET and

8.2.1

Hard Errors

RETURN TO CENTERLINE commands) or that termi-

Any failure to read data correctly after a complete recovery

nates with the positioner in an incorrect location consti-

sequenceTM with ECC enabled constitutes an irrecoverable,

tutes a seek error. The allowable error rate for seek errors is

or hard error. Errors that are not ECC-correctable include

1 error per 10° seek operations.

bursts greater than 11 bits in length and isolated dropped

bits (separated by more than 11 bits) within a sector. The

8.3

allowable error rate for hard errors is 1 error per 10" 2 bits

The actual configuration of customer acceptance testing for

read.

the RP04 Disk Drive used with an RH10 controller depends

RHP04 ACCEPTANCE TESTING

upon the individual contractual arrangements between the
8.2.2

customer and Digital Equipment Corporation. A diagnostic

Soft Errors

distribution list, contained on the magtape distributed with
RP04 Disk Drive, contains the most recent field

Any failure to read correctly on the first try, data that is
then read successfully during a recovery sequence, consti-

the

tutes a recoverable, or soft error. The allowable error rate

procedures for determining whether or not the RP0O4 meets

for soft errors is 1 error per 10° bits read.

the error specification established by DEC for minimum

acceptable performance at installation. One version of such

MAINDEC-10-DCRHA Deviceless Diagnostic

acceptability testing might be as shown below, based on

This program exercises the major portion of RH10 logic; no

subtests contained in the RP04 Disk Transfer and Reli-

Massbus device necessarily has to be connected to the

ability Diagnostic (MAINDEC-10-DCRPG).

system. The I/O bus and DF10/DF10C channel bus paths
are thoroughly exercised.

8.3.1

Diagnostic and Reliability Testing

MAINDEC-10-DCRPF Disk Exerciser
1.

Run MAPWRT to identify potential error areas

This

of a given pack, so the computer can avoid

checks Massbus error conditions. Simple data transfers to
and

pack-attributable errors.

program exercises all RPO4 Massbus registers, and
from

the

disk are executed and basic mechanical

movements are tested. The program can be caused to loop
2.

Run ITEST for one pass, then rotate packs and

on errors.

run it again. Continue in this manner until each

pack has been read by every drive to ensure

This

compatibility between drives and packs. One

transceiver problems during installation. It should also be

diagnostic is useful in isolating Massbus cable and

soft error per pack, per pass is permitted (one

run after replacement of any DCL board, before attempting

pass = at least 10° bits).

more complicated programs. To verify Massbus operation,
run DRSTAT, which uses the control bus only and checks
of

the read/write capabilities of all DCL registers. If problems

1 X 10'° bits/drive has been read. (Nominal

occur, isolate to the drive, and then to the module. Figure

Run

Script

until

minimum

run time = approximately 3 hours/drive.) Sum-

8-1 is a block diagram of the RP04 DCL, and is useful in

mary

identifying defective modules flagged by DRSTAT. For

printout

every

hour

indicates, among

other things, the number of bits transferred.

example, an inability to write DRER3 (15) would map to

Multiple drives can be tested; refer to DCRPG

replacement of the EC board. If data showed parity errors

for details.

while writing, the Massbus transceiver, the EC board MUX,
or the SN board buffer and parity network would be

8.3.2

User Mode

suspect. If more than one drive is affected, power down

In User Mode no unrecoverable or hard errors are permitted

(CB1 OFF) all drives, except one, and isolate the Massbus

within

problem. After running DRSTAT, run DATA to verify the

errors.)

24-hour
more

period.
than

(Disregard

five

soft

pack-attributable

errors that are

not

data bus portion of the Massbus. Successful operation of

pack-attributable are permitted per drive within a 24-hour

these

period.

operation.

8.4

RP04

DIAGNOSTIC DESCRIPTIONS

programs

Disk

ensures

correct

Transfer

and

cabling and transceiver

Reliability

Diagnostic

For complete descriptions of specific diagnostics, refer to

(MAINDEC-10-DCRPG)

the diagnostics themselves. For the latest list of applicable

This is a reliability diagnostic program for RHP04 sub-

diagnostics, refer to the diagnostic distribution list on the

systems consisting of up to 8 drives and an RH10 with an

magtape distributed with the RP04 Disk Drive. Among the

associated DF10/DF10C Data Channel. Basic and complex

diagnostics likely to be contained on that list are the

data transfers

following.

depending upon the tests selected.

8-2

and mechanical movements are executed,

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RP04 DISK DRIVE

INSTALLATION MANUAL

Reader’s

EK-RP04-IN-001

Comments

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Organization

Street

Department

City

State

Zip or Country

FIRST CLASS

PERMIT NO. 33
MAYNARD, MASS.

BUSINESS REPLY MAIL
NO POSTAGE STAMP NECESSARY IF MAILED IN THE UNITED STATES

Digital Equipment Corporation

Postage will be paid by:

Technical Documentation Department
-

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Maynard, Massachusetts 01754

DIGITAL EQUIPMENT CORPORATION mngflnan WORLDWIDE SALES AND SERVICE
TM

MAIN OFFICE AND PLANT

Maynard, Massachusetts, U.S.A. 01754 * Telephone: From Metropolitan Boston: 646-8600 « Elsewhere: (617)-897-5111

X
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TWX: 710-347-0212 Cable: DIGITAL MAYN Telex: 94-8457

DOMESTIC
NORTHEAST

MID-ATLANTIC (cont.)

CENTRAL (cont.)

REGIONAL OFFICE:
235 Wyman Street, Waltham, Mass. 021
Telephone: (617)-890-0330/0310
Dataphone 617-890-3012 or 3013

Princeton

U.S. Route 1, Princeton, New Jersey 08540
Telephone: (609)-452-2940
Dataphone: 609-452-2940

MICHIGAN
Ann Arbor

CONNECTICUT

NEW YORK

Meriden
.

240 Pomeroy Ave., Meriden, Conn. 06540

Telephone:

(203)-237-8441/7466

Dataphone: 203-237-8205

Fairfield
1275 Post Road, Fairfield, Conn. 06430
Telephone: (203)-255-5991
NEW YORK
Rochester
130 Allens Creek Road, Rochester, New York
Telephone: (716)-461-1700
Dataphone: 716-244-1680

Syracuse
6700 Thompson Road, Syracuse, New York 13211
Telephone: (315)-437-1593/7085
Dataphone: 315-454-4152
MASSACHUSETTS

Marlborough

One Iron Way

Long
1

MID-ATLANTIC
REGIONAL OFFICE:
U.S. Route 1, Princeton, New Jersey 08540

Telephone: (609)-452-2940

Orlando
Suite 130, 7001 Lake Ellenor Drive, Orlando, Florida 32809
Telephone: (305)-851-4450
Dataphone: 305-859-2360

GEORGIA
Atlanta

2815 Clearview Place, Suite 100
Atlanta, Georgia 03040
Telephone: (404)-451-7411
Dataphone: 305-859-2360

NORTH CAROLINA
Durham/Chapel Hill
Executive Park
3700 Chapel Hill Blvd.
Durham, North Carolina 27707
Telephone: (919)-489-3347
Dataphone: 919-489-7832
NEW JERSEY

Fairfield

Telephone: (602)-268-3488

Dataphone: 313-557-3063

Southfield, Michigan 48075

MINNESOTA
Minneapolis
8030 Cedar Ave. South, Minneapolis, Minnesota 55420
Telephone: (612)-854-6562-3-4-5
Dataphone: 612-854-1410

Manhattan

MISSOURI

Kansas City

PENNSYLVANIA

)

Philadelphia

Digital Hall

1740 Walton Road, Blue Bell, Pennsylvania 19422
Telephone: (215)-825-4200

Santa Ana
2110 S. Anne Street, Santa Ana, California 92704

Telephone: (714)-979-2460

WASHINGTON D.C.
Lanham 30 Office Building
4900 Princess Garden Parkway, Lanham, Maryland

Dataphone: 301-459-7900 X53

Telephone: (216)-946-8484

COLORADO

Telephone: (513)-294-3323

Ex. 78

ILLINOIS

Dallas

Plaza North, Suite 513
2880 LBJ Freeway, Dallas, Texas 75234

Dataphone: 214-620-2061

HOUSTON

LOUISIANA
New Orleans

WISCONSIN

Telephone: (504)-837-0257

EUROPEAN HEADQUARTERS

UNITED KINGDOM (cont.)

3100 Ridgelake Drive, Suite 108
Metairie, Louisiana 70002

OREGON
Portland
Suite 168
5319 S.W. Westgate Drive, Portland, Oregon 97221

Telephone: (503)-297-3761/3765

UTAH
Salt Lake City
429 Lawn Dale Drive, Salt Lake City, Utah 84115
Telephone: (801)-487-4669
Dataphone: 801-467-0535

WASHINGTON
Bellevue
13401 N.E. Bellevue, Redmond Road, Suite 111

Milwaukee

Dataphone: 504-833-2800

Albuquerque

)

6656 Hornwood Drive
Monterey Park, Houston, Texas
7
Telephone: (713)-777-3471
Dataphone 713-777-1071

Dataphone: 312-498-2500

NEW MEXICO
10200 Menual N.E., Albuquerque, New Mexico 87112
Telephone: (505)-296-5411/5428
Dataphone: 505-294-2330

400 Penn. Center Boulevard, Pittsburgh, Pennsylvania 15235
Telephone: (412)-243-9404
Dataphone: 412-824-9730
TEXAS

E. Bellevue Avenue

Suite 5, Englewood, Colorado 80110
Telephone: (303)-770-6150
Dataphone: 303-770-6628

Dataphone: 918-749-2714

PENNSYLVANIA
Pittsburgh

Telephone: (214)-620-2051

Chicago
1850 Frontage Road

7901

Dataphone: 513-298-4724

OKLAHOMA

Telephone: (918)-749-4476

Dataphone: 415-562-2160

1510 Cotner Avenue, Los Angeles, California 90025
v
Telephone: (213)-479-3791/4318
Dataphone: 213-478-5626

3101 Kettering Boulevard
Dayton, Ohio 45439

Winston Sq. Bldg., Suite 4, Tulsa, Oklahoma 74135

Indianapolis
21 Beachway Drive, Suite G
Indianapolis, Indiana 46224
Telephone: (317)-243-8341
Dataphone: 317-247-1212

West Los Angeles

Dataphone: 216-946-8477

CENTRAL

INDIANA

Dataphone: 714-280-7825

Oakland

Telephone: (415)-635-5453/7830

Dayton

REGIONAL OFFICE:

Metuchen
95 Main Street, Metuchen, New Jersey 08840
Telephone: (201)-549-4100/2000
Dataphone: 201-548-0144

San Francisco

7850 Edgewater Drive, Oakland, California 94621

Tulsa
3140 S. Winston

1850 Frontage Road, Northbrook, Illinois 60062
Telephone: (312)-498-2500
Dataphone: 312-498-2500

5.5

1400 Terra Bella, Mountain View, California 94040
Telephone: (415)-964-6200
Dataphone: 415-964-1436

2500 Euclid Avenue, Euclid, Ohio 44117

Dataphone: 615-584-0571

Telephone: (301)-459-7900

St. Louis
Suite 110, 115 Progress Parkway
Maryland Heights, Missouri 63043
Telephone: (314)-878-4310
Dataphone: 816-461-3100

Dataphone: 714-979-7850

San Diego
6154 Mission Gorge Road
Suite 110, San Diego, California
Telephone: (714)-280-7880/7970

OHIO
Cleveland

6311 Kingston Pike, Suite 21E
Knoxville, Tennessee 37919

Dataphone: 602-268-7371

CALIFORNIA

12401 East 43rd Street, Independence, Missouri 64055
Telephone: (816)-252-2300
Dataphone: 816-461-3100

Northbrook, Illinois 60062

253 Passaic Ave., Fairfield, New Jersey 07006
Telephone: (201)-227-9280
Dataphone: 201 -227-9280

4358 East Broadway Road, Phoenix, Arizona 85040

Suite 189

810 7th Ave., 22nd Floor
New York, N.Y. 10019
Telephone: (212)-582-1300

Telephone: (615)-588-6571

FLORIDA

ARIZONA
Phoenix

23777 Greenfield Road

Knoxville
Telex: 710-347-0348

REGIONAL OFFICE:
310 Soquel Way, Sunnyvale, California 94086
Telephone: (408)-735-9200
Dataphone: 408-735-1820

230 Huron View Boulevard, Ann Arbor, Michigan 48103
Telephone: (313)-761-1150
Dataphone: 313-769-9883
Detroit

Island

Huntington Quadrangle

Suite 1507 Huntington Station, New York 11746
Telephone. (516)-694-4131, (212)-895-8095
Dataphone: 516-293-5693

TENNESSEE

Marlborough, Mass. 01752

Telephone: (617)-481-7400

WEST

Wisconsin 53222
8531 West Capitol Drive, Mil vaukee,
Dataphone: 414-463-9115
Telephone: (414)-463- 9110

Bellevue, Washington 98005

Telephone: (206)-545-4058/455-5404

Dataphone: 206-747-3754

INTERNATIONAL

FRANCE

Telephone: (0734)-583555

Telex: 8483278

Digital Equipment France

GRENOBLE
Digital Equipment France
Tour Mangin

Telex: 212-32882

GERMAN FEDERAL REPUBLIC

Digital Equipment GmbH
MUNICH
8 Muenchen 13, Wallensteinplatz 2
Telephone: 0811-35031
Telex: 524-226

COLOGNE
5 Koeln 41, Aachener Strasse 311
Telephone: 0221-44-40-95
Telex: 888-2269
Telegram: Flip Chip Koeln

FRANKFURT

Telex: 41-76-82

HANNOVER

3 Hannover, Podbielskistrasse 102
Telephone: 0511-69-70-95
Telex: 922-952

STUTTGART

Telex: 841-722-393

108 Rue D'Arlon
1040 Brussels, Belgium

Telephone: 02-139256

Telex: 25297

Digital Equipment Corporation Ges.m.b.H.

VIENNA
Mariahilferstrasse 136, 1150 Vienna 15, Austria

Telephone: 85 51 86

UNITED KINGDOM
Digital Equipment Co. Ltd.

U.K. HEADQUARTERS

SWEDEN
Digital Equipment AB
STOCKHOLM
Englundavagen 7, 171 41 Solna, Sweden
Telephone: 98 13 90
Telex: 170 50
Cable: Digital Stockholm

SLO

Trondheimsveien 47

BIRMINGHAM

Telex: 19079 DEC N

Warwickshire,

England

Telephone: 021-355-5501

Telex: 337-060

BRISTOL

o— SP
Telephone: 52-7806/1870, 51-0912
PORTO ALEGRE — RS
Rua Coronel Vicente 421/101

Porto Alegre — R

SANTIAGO
Coasin Chile Ltda. (sales only)
Casilla 14588, Correo
1

SF-00710 Helsinki 71
Telephone: (090) 370133
Cable: Digital Helsinki

6 Montrose Avenue
Norwood. South Australia 5067
Telephone: (08)-42-1339
Telex: 790-82825

BRISBANE
133 Leichhardt Street

Spring Hill

Digital Equipment Corporation S.A.

)

20, Quai Ernest Ansermet
Boite Postale 23, 1211 Geneva 8, Switzerland
Telephone No. 022 20 40 20 and 20 58 93 and 20 68 93

Telex: 28 92 01

01-46-41-91

Telex: 56059

Brisbane, Queensland, Australia 4000
Telephone: (072)-293088
Telex: 790-40616

CANBERRA
27 Collie St.
Fyshwick, A.C.T. 2609 Australia
Telephone: (062)-959073

Equipment S.p.A.

Digital Equipment Corporation Ltd.
MADRID
Ataio Ingenieros S.A., Enrique Larreta 12, Madrid 16

MANCHESTER

Telephone: 215 35 43

Arndale

BARCELONA

Telex: 27249

Ataio Ingenieros S.A., Granduxer 76, Barcelona 6
Telephone: 221 44 66

INDIA

BOMBAY
)
Hinditron Computers Pvt. Ltd.
69/A, L. Jagmohandas Marg.
Bombay-6 (WB) India
Telephone: 38-1615: 36-5344
Cable: TEKHIND

Mexitek,

60 Park Street South Melbourne, Victoria 3205
Au

|
(

‘
Telex: 011-2594 Plenty

S A.

Eugenia 408 Deptos. 1

Apdo. Postal 12-1012
Mexico 12, D.F

(03)-699-2888

Telex: 790-30700

Telephone: (905) 536-09-10

PHILIPPINES

643 Murray Street
West Perth, Western Australia 6005

MANILA

Telephone

Stanford Computer Corporation
P.O. Box 1608

(092)-21-4993

Telex: 790-92140

SYDNEY

P.O. Box 491, Crows Nest
N S W. Australia 2065
Telephone (02)-439-2565

416 Dasmarinas St., Manila

Telephone: 49-68-96

Telex

NEW ZEALAND
Digital Equipment Corporation Ltd.

Auckland, New Zealand
Telephone: 75533

Telex: 742-0352

790-20740

AUCKLAN
Hilton House, 430 Queen Street, Box 2471

v
i

Cable: COACHIL

MEXICO CITY

PERTH

MILAN

Telephone: 396713

MEXICO

MELBOURNE

Telephone

CHILE

Digital Equipment Australia Pty. Ltd.

SWITZERLAND

SPAIN

printed in U.S.A.

SAO PAULO

AUSTRALIA

Corso Garibaldi 49, 20121 Milano, Italy
Telephone: (02)-879-051/2/3/4/5
Telex 843-33615
-

Telex: 668666

Telex: 610-929-2006

GENERAL INTERNATIONAL SALES

ADELAIDE

FINLAND

EDINBURGH
Shiel House, Craigshill, Livingston,
West Lothian, Scotland
Telephone: 32705
Telex: 727113

Telephone: (061)-865-7011

Rio De Janeiro — GB
Telephone: 264-7406/0461/7625

From Metropolitan Boston, 646-8600

ITALY

Chester Road. Stretford, Manchester M32 9BH

Suite 202
644 S.W. Marine Dr., Vancouver
British Columbia, Canada V6P 5Y1

TWX: 710-347-0217/0212

Telephone

Telex: 27560

RIO DE JANEIRO — GB
Ambriex S.A.
Rua Ceara, 104, 2 e 3 andares ZC - 29

146 Main Street, Maynard, Massachusetts 01754

EALING

House

BRAZIL

TWX: 403-255-7408

VANCOUVER

Telephone: (617) 897-5111

Bilton House, Uxbridge Road, Ealing, London W.S.
Telephone: 01-579-2334
Telex: 2237

Telephone: 01-405-2614/4067

BUENOS AIRES
Coasin S.A.
Virrey del Pino, 4071, Buenos Aires
Telephone: 52-3185
Telex: 012-2284

Titismaantie 6

ZURICH

WC 2B 5PT, England

Calgary, Alberta, Canada
Telephone: (403)-435-4881

Telex: 385-9056

ARGENTINA

Digital Equipment AB
HELSINKI

Digital Equipment Corp. AG
Schaffhauserstr. 315
CH-8050 Zurich, Switzerland

LONDON

Telex: 610-422-4124

Suite 140, 6940 Fisher Road S.E.

Santurce, Puerto Rico 00912
Telephone: (809)-723-8068/67

Telephone: 24-7411

Digital

(

Digital Equipment Corporation De Puerto Rico
407 del Parque Street

Cable: DIGITAL MAYN
Telex: 94-8457

Fish Ponds Road. Fish Ponds
Bristol. England BS163HQ
Telephone: Bristol 651-431

Management House
43 Parker St., Holborn, London

Telephone: (514)-636-9393
CALGARY /Edmonton

REGIONAL OFFICE

Digital Equipment Aktiebolag
COPENHAGEN
Hellerupveg 66

GENEVA

Maney Buildings

29/31 Birmingham Rd , Sutton Coldfield

)

Telex: )-26428

PUERTO RICO
TWX: 610-562-8732

MONTREAL

Telephone: (604)-325-32‘31

Oslo 5, Norway

Telephone: 02/68 34 40

Fountain House, Butts Centre
Reading RG1 70N, England
Telephone: (0734)-583555
Telex: 8483278

Minato-Ku, Tokyo 107, Japan

Telephone: 586-2771

No. 18-14 Nishlshlmbashl 1-Chome

9045 Cote De Liesse
‘
Dorval, Quebec, Canada HIP 2M9

2900 Hellerup, Denmark

AUSTRIA

Kowa Building No. 16
— Annex, First Floor

9-20 Akasaka 1-Chome

Minato-Ku, Tokyo, Jap
Telephone: 5915246
Telex 781-4208

TORONTO
2550 Goldenridge Road, Mississauga, Ontario
Telephone: (416)-270-9400
TWX: 610-492-7118

DENMARK

D-7301 Kemnat. Stuttgart
Marco-Polo-Strasse 1
Telephone: (0771)-45-50-65

Telex: 922-33-3163

Kozato-Kaikan Bldg.

Ottawa, Ontario, Canada
K2H 8K8
Telephone: (613)-592-5111

Digital Equipment N.V./S.A.
BRUSSELS

Digital Equipment Corp. A/S

Am Forstaus Gravebruch 5-7

Tel Aviv, lsr

Digital Equipment of Canada, Ltd.
CANADIAN HEADQUARTERS
P.O. Box 11500

NORWAY

6078 Neu-Isenburg 2

Digital Equipment Corporation International

CANADA

THE HAGUE
Sir Winston Churchillian 370
Rijswijk/The Hague, Netherlands
Telephone: 94 9220
Telex: 32533

BELGIUM

16 Rue Du Gal Mangin
38100 Grenoble, France
Telephone: (76)-87-56-01

JAPAN

DEC Systems Computers Ltd.
TEL AVIV
Suite 103, Southern Habakuk Street

Rikei Trading Co., Ltd. (sales only)

Digital Equipment N.V.
26840

ISRAEL

Telephone: (03) 443114/440763

NETHERLANDS

Centre Silic — Cidex L 225
94533 Rungis, France
Telephone: 687-23-33
Telex:

Telephone: 06102-5526

Fountain House, Butts Centre
Reading RG1 70N, England

TM,

1211 Geneva 26, Switzerland
Telephone: 42 79 50
Telex: 22 683

READING

Digital Equipment Corporation International Europe
81 route de I'Aire

VENEZUELA
CARACAS

Coasin, C.A.
Apartado 50939

Sabana Grande No. 1, Caracas 105
Telephone: 72-8662; 72-9637
Cable: INSTRUVEN