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EK-2022S-1G-001

June 1992

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Document:	DSP2022-S SCSI Disk Drive Installation Guide
Order Number:	EK-2022S-1G
Revision:	001
Pages:	16
Original Filename:

OCR Text

DSP2022-S
SCSI Disk Drive
Installation Guide
EK-2022S-IG-001

Digital Equipment Corporation

June, 1992
The information in this document is subject to change
without notice and should not be construed as a
commitment by Digital Equipment Corporation. Digital
Equipment Corporation assumes no responsibility for any
errors that may appear in this document.

Contents

Scope of Information . . . . . . . . . . . .

Before You Begin . . . . . . . . . . . . . .

Locate the SCSI Connector . . . . . . .

Note Pin Status of the Vendor-Specific
Field . . . . . . . . . . . . . . . . . . . . . .

Note the Use of the SCSI Pin
Functions . . . . . . . . . . . . . . . . . . .

Locate Jumper Connector J1 . . . . . .

Learn the Jumper Functions . . . . . . .

Set the SCSI Device Address . . . . . .

Set the SCSI Address Remotely . . . .

Provide SCSI Bus Termination . . . . .

Obtain a Mounting Kit . . . . . . . . . . .

Locate the Drive Mounting Holes . . . .

Use the Drive Mounting Guidelines . .

Drive Specifications . . . . . . . . . . . .

iii

iv Contents

Figures
1

SCSI Connector . . . . . . . . . . . . . . .

Location of Jumper Connector J1 . . .

Side Mounting Holes . . . . . . . . . . . .

Bottom Mounting Holes . . . . . . . . . .

Tables
1

Vendor-Specific Pin Options . . . . . . .

SCSI Pin Functions . . . . . . . . . . . .

Jumper Descriptions . . . . . . . . . . . .

Set SCSI Device Address . . . . . . . .

Remote SCSI Address Determination .

Drive Specification Summary . . . . . .

DSP2022-S SCSI Disk Drive Installation Guide 1

Scope of Information
This guide supplies information needed to configure and
install your Model DSP2022-S 2.5-inch Small Computer
System Interface (SCSI) disk drive. The tasks you need
to perform are listed in order in the table of contents. The
specifications for the disk drive are found on the last page.

Before You Begin
Before removing the drive from its antistatic bag or
attempting installation, please read the following cautions:

ANTISTATIC CAUTION
As with any integrated circuit device, we highly
recommend that you use a properly grounded wrist
strap and antistatic pad when removing the disk drive
from its antistatic bag and handling it outside the bag.
HANDLING CAUTION
As with any delicate instrument, prevent shocks by
always placing it down gently. Avoid quick motions or
bumping.

2 DSP2022-S SCSI Disk Drive Installation Guide

Locate the SCSI Connector
Locate the SCSI 50-pin connector shown at the rear of
the drive in Figure 1 . This connector is used for cable
installation later. Note that the pins of the SCSI connector
are divided into two pin fields: one for the SCSI interface
signals and the other for the vendor-specific options. Learn
the use of these two pin fields in the following sections.
Figure 1

SCSI Connector

SCSI 50 PIN CONNECTOR

TWO MISSING PINS
SEPARATE PIN FIELD

MISSING PIN - KEY

20 X 2 PIN FIELD
SCSI SIGNALS

4 X 2 PIN FIELD
VENDOR SPECIFIC
OPTIONS
CXO-3494A-TI_R

DSP2022-S SCSI Disk Drive Installation Guide 3

Note Pin Status of the Vendor-Specific Field
The vendor-specific pin field consists of pins A1–A8. These
pins are used for testing at the factory, setting the SCSI ID
address remotely, and supply power to an external drive
activity light emitting diode (LED). The recommended pin
status is given in Table 1.
Table 1

Vendor-Specific Pin Options

Function

Status

Reserved for
manufacturing
Test UART transmit data
+12 V for controller ROM
Test UART receive data
SCSI ID bit 0
SCSI ID bit 1
SCSI ID bit 2
Drives external activity
LED. LED on indicates
the drive is processing
commands from the
host.

Leave open

A2
A3
A4
A5
A6
A7
A8

Leave open
Leave open
Leave open
See Table 5
See Table 5
See Table 5
Active low, 24 mA

Note the Use of the SCSI Pin Functions
The 40 SCSI pins carry the SCSI signals, power, and
ground paths for the drive circuitry. Table 2 provides a list
of the pin functions. For a full explanation of the SCSI pin
functions, refer to the ANSI SCSI-2 Specification.

4 DSP2022-S SCSI Disk Drive Installation Guide

Table 2

SCSI Pin Functions

Function

01
03
05
07
09
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39

+5V
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Key (no pin)
Ground
Ground
Ground
-ATTN
Ground
-RST
Ground
-I/O
Ground
GND Motor
+5V Motor

02
04
06
08
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40

+5V
Ground
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
DBP
TERMPWR
-BSY
-ACK
-MSG
-SEL
-C/D
-REQ
GND Motor
+5V Motor

DSP2022-S SCSI Disk Drive Installation Guide 5

Locate Jumper Connector J1
Locate jumper connector J1 on the electronic component
side of the drive, shown in Figure 2. Note that connector
J1 contains eight jumper pairs numbered 0 through 7. Your
drive comes with all jumpers in place.
Figure 2

Location of Jumper Connector J1
JUMPER PAIR 7

JUMPER PAIR 0
CXO-3500A-MC_R

6 DSP2022-S SCSI Disk Drive Installation Guide

Learn the Jumper Functions
The jumper functions on the SCSI drive are described
in Table 3. These jumpers allow you to set the device
address, disable automatic spin-up, change the delay time
before spin-up, and enable drive power for an external SCSI
terminating resistor. The drive is shipped with all jumpers
installed.
Table 3

Jumper Descriptions

Jumper Function

Jumper
Status

0
1
2
3

See Table 4
See Table 4
See Table 4
IN

5
6

Device Address bit 0
Device Address bit 1
Device Address bit 2
Enables automatic spin up
when power is applied
Disables automatic spin up
when power is applied
Disables spin-up delay timer.
Enables spin-up delay timer
of 10 seconds times the SCSI
ID. The delay is valid only
when automatic spin up is
enabled.
Reserved
Prevents the manufacturing
test from being initiated if pin
A1 is grounded.
Enables drive power to an
external SCSI bus terminator
Disables drive power to an
external SCSI bus terminator

OUT
IN
OUT

IN
OUT

DSP2022-S SCSI Disk Drive Installation Guide 7

Set the SCSI Device Address
Jumpers 0, 1, and 2 are used to set the SCSI device
address. Table 4 shows the jumper IN or OUT status for
setting the SCSI device address. IN means jumpers are in
place and OUT means jumper are removed. Save unused
jumpers.
Table 4

Set SCSI Device Address

Jumper
2

Jumper
1

Jumper
0

Device Address

IN
IN
IN
IN
OUT
OUT
OUT
OUT

IN
IN
OUT
OUT
IN
IN
OUT
OUT

IN
OUT
IN
OUT
IN
OUT
IN
OUT

0 (see Table 5)
1
2
3
4
5
6
7

8 DSP2022-S SCSI Disk Drive Installation Guide

Set the SCSI Address Remotely
When jumpers 0, 1, and 2 are left in place for a device
address of 0, the drive will use the remote active encoded
SCSI device address (ID) number on the vendor-specific
connector at the rear of the drive. If there is not an active
ID address on pins A5–A7, the drive will assume the ID is
0. Refer to Table 5 for the pin electrical states.
Table 5

Remote SCSI Address Determination

Pin
A7

Pin
A6

Pin
A5

Device Address

1
1
1
1
0
0
0
0

1
1
0
0
1
1
0
0

1
0
1
0
1
0
1
0

0
1
2
3
4
5
6
7

NOTE
Table 5 refers to Transistor-Transitor Logic (TTL)
voltage levels. TTL high = 1, and TTL low = 0.

DSP2022-S SCSI Disk Drive Installation Guide 9

Provide SCSI Bus Termination
The SCSI bus only needs termination resistors at the
beginning and end of the bus. Since this drive does not
have a SCSI bus terminating resistor on it, bus terminating
resistors must be located external to the drive. The drive
does provide power for an external terminating resistor over
SCSI connector pin 24. Leave jumper 7 in place to enable
the drive terminator power supply. Remove jumper 7 if you
don’t need SCSI bus termination.

Obtain a Mounting Kit
Due to the large number of possible installation cabinets
and slot sizes, your drive does not come with an installation
kit of brackets, screws, and cables. You must obtain the
parts needed for your particular installation from your
distributor or purchasing source.

Locate the Drive Mounting Holes
Two holes are provided on each side of the drive for side
mounting. Four mounting holes are provided on the bottom
surface for bottom mounting. These mounting holes are
shown in Figures 3 and 4.
Figure 3

Side Mounting Holes
MOUNTING HOLE (2)
M3 x 0.5
BOTH SIDES

.740 in
18.80 mm

1.375 in
34.93 mm

1.500 in
38.10 mm

.244 in
6.20 mm
CXO-3496A-MC_R

10 DSP2022-S SCSI Disk Drive Installation Guide

Figure 4

Bottom Mounting Holes
4.000 in
101.60 mm
MOUNTING HOLE SCREW (4)
M3 x 0.05

.165 in
4.19 mm

2.420 in
61.47 mm

1.375 in

1.500 in

34.93 mm

38.10 mm
CXO-3495A-MC_R

DSP2022-S SCSI Disk Drive Installation Guide 11

Use the Drive Mounting Guidelines
Use this list of drive mounting guidelines to prevent
mounting problems.
•

The drive may be mounted in any orientation.

•

Mounting screws should not penetrate the mounting
holes beyond the depths given in this list.

•

Mounting screws are M3 X 0.5 metric screws (3mm
diameter and 0.5 thread pitch).

•

The recommended screw depth penetration of the
bottom mounting holes is 0.381 centimeters (0.15
inches).

•

The recommended screw depth penetration of the side
mounting holes is 0.254 centimeters (0.1 inches).

12 DSP2022-S SCSI Disk Drive Installation Guide

Drive Specifications
The performance and environmental specifications for your
disk drive are listed in Table 6.
Table 6

Drive Specification Summary

Formatted Storage
Average Seek Time
Typical spin up time
Disk rotation speed
Bytes per block
Height
Length
Width
Weight
Voltage & regulation
Active mode power
Operating Altitude
Operating Temperature

220,000,000 bytes
Less than 10 milliseconds
Less than 12.5 seconds
5400 RPM
512
0.75 in. (19.0 mm)
4.0 in. (101.6 mm)
2.75 in. (69.8 mm)
7.3 oz. (.20 kg.)
+5VDC +/- 5%
Less than 5 watts
-200 to + 10,000 feet
-61 to + 3,048 meters
+40 to +131 degrees F
+5 to +55 degrees C