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Document:	RA90/RA92 Disk Drive User Guide
Order Number:	EK-ORA90-UG
Revision:	002
Pages:	43
Original Filename:

OCR Text

RA90/RA92 Disk Drive User Guide
Order Number EK–ORA90–UG–002

Digital Equipment Corporation
Maynard, Massachusetts

First Printing, June 1988
Second Printing, March 1990
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.
The software described in this document is furnished under a license and may be used or copied only in
accordance with the terms of such license.
No responsibility is assumed for the use or reliability of software on equipment that is not supplied by Digital
Equipment Corporation or its affiliated companies.
Restricted Rights: Use, duplication, or disclosure by the U.S. Government is subject to restrictions as set forth in
subparagraph (c) (1)(ii) of the Rights in Technical Data and Computer Software clause at DFARS 252.227-7013.
Copyright © 1988, 1990 by Digital Equipment Corporation

All Rights Reserved.
Printed in U.S.A.
The postpaid READER’S COMMENTS card requests the user’s critical evaluation to assist in preparing future
documentation.
FCC NOTICE: The equipment described in this manual generates, uses, and may emit radio frequency energy.
The equipment has been type tested and found to comply with the limits for a Class A computing device pursuant
to Subpart J of Part 15 of FCC Rules, which are designed to provide reasonable protection against such radio
frequency interference when operated in a commercial environment. Operation of this equipment in a residential
area may cause interference, in which case the user at his own expense may be required to take measures to
correct the interference.
The following are trademarks of Digital Equipment Corporation:
DEC
DECUS
DECnet
HSC
KDA
MASSBUS
MicroVAX
MSCP
PDP
RA

RC25
RQDX3
RSTS/E
RSX
RT-11
SA
TA
TK
TOPS-10
TOPS-20

TU
UDA50
ULTRIX
UNIBUS
VAX
VAXsimPLUS
VMS

RA90 ©Digital Equipment Corporation 1987
Covered by one or more U.S. PAT. Nos.
4,475,212
4,434,487
4,503,420

4,150,172
and other patents pending

This document was prepared using VAX DOCUMENT, Version 1.1

Contents
About This Manual
1

vii

Introduction
1.1

General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1–1

1.2

Hardware Maintainability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1–1

1.3

Dual-Port Capability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1–2

1.4

Drive-Resident Diagnostics Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1–3

1.5
User Precautions/Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.5.1
Data Recovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.5.2
Recommended Operating Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.5.3
Electrostatic Discharge Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1–3
1–4
1–4
1–5

1.6

RA90/RA92 Maintenance Strategy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1–5

1.7

RA90/RA92 Disk Drive Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1–5

Installation
2.1

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–1

2.2

Site Preparation and Planning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–1

2.3

Unpacking RA90 and RA92 Add-On Disk Drives . . . . . . . . . . . . . . . . . . . . . . . .

2–1

2.4
Installing SDI Cables and Power Cords . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4.1
Installing Internal SDI Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4.2
Installing Internal Power Cords . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4.3
Installing External SDI Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–3
2–3
2–3
2–3

2.5

Power and Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–3

2.6

AC Power Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–5

2.7

Voltage Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–5

iii

iv Contents

Operating Instructions
3.1

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–1

3.2

OCP Functions, Switches, and Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–1

3.3
Power-Up Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.1
Problems at Power-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–1
3–3

3.4
Acceptance Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4.1
Operator Control Panel Lamp Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4.2
Testing Spun-Down Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4.3
Testing Spun-Up Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–4
3–4
3–5
3–5

3.5
Programming the Drive Unit Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.5.1
Alternate Unit Address Display Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–6
3–8

3.6
RA90/RA92 Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6.1
Normal Mode Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6.2
Fault Display Mode Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6.3
Test Mode Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–8
3–8
3–10
3–12

Diagnostics
4.1

General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4–1

4.2
Drive-Resident Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2.1
Power-Up Resident Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4–1
4–1

4.3

4–2

Test Selection from the OCP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Customer Equipment Maintenance
A.1 Customer Responsibilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A.1.1
Cleaning Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A.1.2
Ongoing Equipment Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A.1.3
Monthly Equipment Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A.1.4
Maintenance Records . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A–1
A–1
A–1
A–2
A–2

Index
Figures
1–1
1–2
1–3
1–4
2–1
2–2
2–3
2–4

RA90/RA92 Disk Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Typical RA90/RA92 Subsystem Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . .
RA90/RA92 Dual-Port Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ESD Wrist Strap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RA90/RA92 Disk Drive Packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
881 Power Controller (Example) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Plug Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Drive Circuit Breaker Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1–2
1–3
1–4
1–6
2–2
2–4
2–6
2–7

Contents v

2–5
3–1
3–2
3–3
3–4
3–5
3–6
3–7
3–8
3–9
4–1

Drive Voltage Selector Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RA90/RA92 OCP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Supply Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OCP Displays During Normal Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unit Address Programming Flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Alternate Unit Address Display Mode Flowchart . . . . . . . . . . . . . . . . . . . . . . . .
Fault Display Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fault Mode Flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RA90/RA92 Test Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Running Test OCP Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Test Selection Flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–8
3–2
3–3
3–5
3–7
3–9
3–10
3–11
3–12
3–12
4–3

Specifications for RA90 and RA92 Disk Drives . . . . . . . . . . . . . . . . . . . . . . . . . .
Additional Electrical Specifications by Model for RA90 and RA92 Disk Drives . .
RA90/RA92 Environmental Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OCP Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1–7
1–8
1–9
3–4

Tables
1–1
1–2
1–3
3–1

About This Manual
This manual contains the following information:
•

RA90/RA92 disk drive specifications

•

Environmental considerations

•

Installation information and references

•

Start-up procedures

•

Acceptance testing criteria

•

Troubleshooting procedures

Although this manual is written primarily for RA90 and RA92 disk drive customers, installation
procedures described or referenced in this manual are intended for Digital Customer Services
engineers performing original installation of the RA90 and RA92 disk drives. Qualified Customer
Services engineers must be trained in the following:
•

RA90 and RA92 disk drives

•

DSA concepts

•

ESD procedures

This manual does not cover cabinet cable routing and connections. Specific information concerning
subsystem cabinet-related procedures can be found in product-specific manuals. Related
documentation to supplement this manual is as follows:
Document Title

Order Number

SA600/SA800 Storage Array Family Configuration Guide

EK–SA600–CG

SA650/SA850 Storage Array Family Configuration Guide

EK–SA650–CG

RA90/H9643 Cabinet Installation Guide

EK–RA90H–IN

vii

1
Introduction
1.1 General Information
The RA90 and RA92 disk drives are members of the Digital Storage Architecture/Standard Disk
Interconnect (DSA/SDI) family and are, therefore, plug-compatible with all DSA/SDI controllers.
The RA90 and RA92 disk drives use nonremovable, thin film media and thin film heads encased
in a unit called the Head Disk Assembly (HDA). These standalone disk drives are independently
powered, cooled, and housed. Figure 1–1 shows an RA90/RA92 standalone disk drive.
The RA90 and RA92 disk drives are moving head, random access disk drives. The RA90 disk drive
has a formatted data storage capacity of 1.216 gigabytes and an unformatted data storage capacity
of 1.604 gigabytes in a 16-bit word format. The RA92 disk drive has a formatted data storage
capacity of 1.506 gigabytes and an unformatted data storage capacity of 1.987 gigabytes in a 16-bit
word format.
The RA90 and RA92 disk drives have the following common characteristics:
•

2.77 megabytes/second transfer rate

•

Dedicated and embedded servo for coarse and fine track positioning

•

Three internal microprocessors

•

Reduced drive electronic module set

•

Extensive resident microcode diagnostics

•

Internal error log capabilities

•

Multifunction operator control panel (OCP)

Figure 1–2 represents a typical RA90/RA92 subsystem configuration including an SDI controller.

1.2 Hardware Maintainability
The RA90 and RA92 disk drives use modular field replaceable units (FRUs) for easy access and
servicing. An extensive set of drive-resident microcode diagnostics and a drive-resident error log
help simplify problem isolation. Customer preventive maintenance is limited to monthly cleaning of
the storage array air vent grill.

1–1

1–2 Introduction

CXO-2196B

Figure 1–1

RA90/RA92 Disk Drive

1.3 Dual-Port Capability
Ports are enabled by the port select switches (A or B) on the front of the OCP. With both port
switches selected, RA90 and RA92 disk drives operate in a static dual-port mode. Static dual
porting means a drive is shared between two controllers but is on line to only one controller at a
time for data transfers. The second controller must wait until the drive is available before placing
the drive on line.
An additional SDI cable is required for dual porting. Figure 1–3 shows an RA90/RA92 dual-port
configuration.

Introduction 1–3

RA90/RA92
DISK DRIVE

DRIVE CABINET

CONTROLLER A
RA90/RA92
DISK
DRIVES

SDI CONTROLLER A

I/O BULKHEADS

I/O BULKHEAD
SDI CABLES

Figure 1–2

CXO-2197B

Typical RA90/RA92 Subsystem Configuration

1.4 Drive-Resident Diagnostics Overview
Drive-resident diagnostics run during power-up and spin-up cycles to test basic drive functions.
These diagnostics are also invoked by the drive any time the drive enters an idle-loop state and
neither port is selected.
Drive-resident diagnostics can be run from the OCP while the drive is off line. See Chapter 4 for a
list of drive-resident diagnostics.

1.5 User Precautions/Recommendations
Digital recommends that certain precautions be taken to protect equipment and user data. These
precautions involve data backup methods, recommended operating temperatures, and electrostatic
discharge protection, all of which are contained in this section.

1–4 Introduction

RA90/RA92
DISK DRIVE

CONTROLLER A

DRIVE CABINET

PORT
A
B

SDI CONTROLLER A

I/O BULKHEAD

Figure 1–3

CONTROLLER B

SDI CONTROLLER B

SDI CABLES

I/O BULKHEADS
CXO-2198B

RA90/RA92 Dual-Port Configuration

1.5.1 Data Recovery
Data is not recoverable on an inoperable HDA. Therefore, it is the user’s responsibility to protect
data by using proper backup procedures. The following backup methods are recommended for RA90
and RA92 disk drives:
•

File duplication—This method normally involves copying the data onto removable media, such
as magnetic tape.

•

Journaling—This method is recommended for files in a transaction processing application.
Journaling allows reconstruction of files up to the last checkpoint or backup.

1.5.2 Recommended Operating Temperature
The RA90 and RA92 disk drives can operate within a temperature range of 10°C to 40°C (50°F to
104°F). However, it is recommended the RA90 and RA92 disk drives be operated in a temperature
range below 25°C (77°F) to increase reliability and product life.

Introduction 1–5

1.5.3 Electrostatic Discharge Protection
Electrostatic discharge (ESD) is caused by the buildup and release of static electricity. An electrical
charge from a person or object can damage hardware components and result in premature device or
option failure.
CAUTION
To avoid product damage, always use ESD grounding straps when handling staticsensitive modules and components.
Use the following guidelines when handling static-sensitive components and modules:
1. Read all instructions and installation procedures included with the static control materials and
kits.
2. Wear a properly grounded ESD wrist strap when handling modules, components, or staticsensitive devices. Figure 1–4 shows an ESD wrist strap in use.
When using an ESD wrist strap:
•

Ensure the wrist strap fits snugly for proper conductivity.

•

Attach the alligator clip securely to a clean, unpainted, grounded, metal surface, such as
the drive or cabinet chassis.

•

Do not overextend the grounding cord.

3. Use static-protective containers to transfer modules and components (including bags and tote
boxes).

1.6 RA90/RA92 Maintenance Strategy
It is recommended that only trained Digital Customer Services engineers attempt to service RA90
and RA92 disk drives.
To repair RA90 and RA92 disk drives, replace the FRU. An extensive set of drive-resident microcode
diagnostics and a drive-resident error log help simplify problem isolation.
Appendix A describes the customer’s equipment maintenance responsibilities.

1.7 RA90/RA92 Disk Drive Specifications
Table 1–1 lists important operating and nonoperating specifications for RA90 and RA92 disk
drives.

1–6 Introduction

CHASSIS
STABILIZER
BRACKET

ALLIGATOR
CLIP

DRIVES

GROUNDING ESD
WRIST STRAP

GROUNDING
CORD

CXO-2168C

Figure 1–4

ESD Wrist Strap

Introduction 1–7

Table 1–1 Specifications for RA90 and RA92 Disk Drives
Characteristic

RA90 Disk Drive

RA92 Disk Drive

Head Disk Assembly (HDA)
Storage capacity, formatted

1.216 gigabytes

1.506 gigabytes

Storage capacity, unformatted

1.604 gigabytes

1.987 gigabytes

HDA word format

16-bit only

Same as RA90

Bits/square inch

40 megabits

49.4 megabits

Tracks/inch

1750

2045

Disk recording method

Rate 2/3 modulation code

Same as RA90

Number of disks

Same as RA90

Disk surfaces

14 (13 data and 1 servo)

Same as RA90

Number of heads

Same as RA90

Heads per surface

Same as RA90

Data tracks

34,437

40,287

Logical cylinders

2656

3101

User logical cylinders

2649

3099

Number of sectors

69 + 1 spare

73 + 1 spare

Number of logical blocks

2,376,153

2,942,849

Seek Times
One cylinder

5.5 milliseconds

3.0 milliseconds

Average seek

18.5 milliseconds

16.0 milliseconds

Full cylinder seek

31.5 milliseconds

29.0 milliseconds

Latency
Rotation speed

3600 r/min

3405 r/min

Average latency

8.33 milliseconds

8.81 milliseconds

Maximum latency

16.67 milliseconds

17.62 milliseconds

Single Start/Stop Time
Start (maximum)

40 seconds

Same as RA90

Inhibit between stop and restart

40 seconds

Same as RA90

Data Rates
Transfer rate

2.77 megabytes/sec

Same as RA90

1–8 Introduction

Table 1–1 (Cont.) Specifications for RA90 and RA92 Disk Drives
Characteristic

RA90 Disk Drive

RA92 Disk Drive

Physical Characteristics
Height

26.56 cm (10.42 inches)

Same as RA90

Width

22.19 cm (8.74 inches)

Same as RA90

Depth

68.47 cm (26.96 inches)

Same as RA90

Weight

31.8 kg (70 pounds)

Same as RA90

Inrush Current
120 Vac

60 amperes peak @ 132 Vac

Same as RA90

220–240 Vac

70 amperes peak @ 264 Vac

Same as RA90

120 Vac

4.6 amps

Same as RA90

220–240 Vac

2.4 amps

Same as RA90

120 Vac

0.7

Same as RA90

220–240 Vac

0.58

Same as RA90

Line cord length (from the cabinet)

2.74 meters (9 feet)

Same as RA90

Running current for:

Power factor:

Table 1–2 contains additional electrical specifications by model for the RA90 and RA92 disk drives.
NOTE
The RA90 and RA92 disk drives are not line-frequency dependent.
Table 1–2 Additional Electrical Specifications by Model for RA90 and RA92 Disk Drives
Input Current (Amps)1
Model

Nominal
Voltage

Start-Up
Current

PH1

Neutral

Power
Dissipation

BTUs/Hour
[Kj/Hour]2

RA90–xx/RA92–xx

120 volts

5.0

3.4

281 Watts

960

RA90–xx/RA92–xx

240 volts

2.35

1.45

271 Watts

[976]

1 Currents are for nominal voltages of 120 VAC phase to neutral or for 240 VAC phase to neutral.

For 101 VAC and 220
VAC nominal voltages, the drives will have proportionately higher phase currents by a ratio of 120/101 or 240/220 to the
currents specified in this table.
2 Bracketed figures indicate kilojoules per hour.

Introduction 1–9

Table 1–3 shows the maximum environmental limits and the recommended environmental ranges
to optimize equipment performance and reliability.
Table 1–3 RA90/RA92 Environmental Limits
Characteristic

RA90/RA92 Disk Drive
Maximum Environmental Limits

Temperature (Required)
Operating

10°C to 40°C (50°F to 104°F) with a temperature gradient of
20°C/hour (36°F/hour)

Nonoperating

–40°C to +60°C (–40°F to +140°F)

Relative humidity
Operating

10% to 90% (noncondensing) with a minimum wet bulb
temperature of 28°C (82°F) and a minimum dew point of 2°C
(36° F)

Nonoperating

10% to 90% with no condensation
Recommended Environmental Operating Ranges

Temperature

18°C to 24°C (64.4°F to 75.2°F) with an average rate of change
of 3°C/hour maximum and a step change of 3°C or less

Relative humidity

40% to 60% (noncondensing) with a step change of 10% or less
(noncondensing)

Air quality (maximum particle count)

Not to exceed 500,000 particles per cubic foot of air at a size of
0.5 micron or larger

Air volume (at inlet)

50 cubic feet per minute (.026 cubic meters per second)

Altitude
Operating

Sea level to 2400 meters (8000 feet); maximum allowable
operating temperatures are reduced by a factor of 1.8°C/1000
meters (1°F/1000 feet) for operation above sea level

Nonoperating

300 meters (1000 feet) below sea level to 7500 meters (16,000
feet) above sea level (actual or effective by means of cabin
pressurization)

2
Installation
2.1 Introduction
This chapter describes site preparation and planning considerations and procedures for unpacking
the RA90 and RA92 disk drives. Cabling, safety precautions, and voltage selection are also
discussed.

2.2 Site Preparation and Planning
Site preparation and planning are necessary before installing an RA90 or RA92 disk drive or
subsystem. Prior to installation, consider the following:
•

Power Requirements: The RA90 and RA92 disk drives use a single-phase power supply;
however, operating voltages are supplied through an 881, 874, H405, or other applicable
(system-specific) power controller.

•

Thermal Stabilization: Thermal stabilization prevents temperature differences between the
equipment and its environment from damaging disk drive components. Equipment must be
placed in its operating environment at least 24 hours prior to operation.
CAUTION
The thermal stabilization procedure is mandatory. Failure to thermally stabilize the
equipment may cause premature equipment failure.

•

Environment: The RA90 and RA92 disk drives must be operated in an environment where
the ambient air particle count does not exceed 500,000 particles (larger than 0.5 micron) per
cubic foot of air. (Refer to Chapter 1 for additional environmental specifications.)

•

Floor Loading: Consider placement and calculate the total weight of your subsystem. An
RA90 or RA92 disk drive weighs approximately 31.8 kilograms (70 pounds).

•

Operating Temperature and Humidity: The required relative humidity range is between
10 percent and 90 percent, with a minimum wet bulb temperature of 28°C (82°F) and a
minimum dew point of 2°C (36°F) (noncondensing) with a step change of 10 percent or less.
The RA90 and RA92 disk drives can be operated in temperatures ranging from 10°C to
40°C (50°F to 104°F). However, it is recommended that the RA90 and RA92 be operated in
a temperature below 25°C (77°F) to increase reliability and extend product life.

2.3 Unpacking RA90 and RA92 Add-On Disk Drives
Check packaging for external damage. Read and save any packing information. Unpack the RA90
or RA92 disk drive using the following procedure (refer to Figure 2–1):
1. Cut and remove the shipping straps.
2. Open the shipping container.

2–1

2–2 Installation

BARRIER
BAG

CONTAINER

MANUALS

PLASTIC BAG
CONTAINING
HARDWARE

RA90/RA92
DISK
DRIVE

DESICCANT

OCP

SHIPPING
STRAPS

CXO-2067D_S

Figure 2–1

RA90/RA92 Disk Drive Packaging

3. Remove and save all packing material surrounding the disk drive.
4. Lift the disk drive from the shipping container.
WARNING
RA90 and RA92 disk drives weigh approximately 31.8 kilograms (70 pounds) each and
must be handled with care.
Do not use the cardboard handles to lift the disk drive from the shipping container.
Injury to personnel or damage to equipment could result if the cardboard handles are
used for this purpose.

Installation 2–3

5. Once the mandatory thermal stabilization period has elapsed, remove the barrier bag and
desiccant surrounding the disk drive.
CAUTION
The thermal stabilization procedure is mandatory. Failure to thermally stabilize the
equipment may cause premature equipment failure.

2.4 Installing SDI Cables and Power Cords
This section is intended as a reference only. For detailed procedures and illustrations, refer to
subsystem-specific documentation.
Most fully configured cabinets have internal SDI cables and power cords in place. Internal SDI
cables are connected to the rear I/O bulkhead located at the base of the cabinet.
Drive power cords are connected to the 881 (or system-specific model) power controller located
behind the rear I/O bulkhead at the bottom of the cabinet. Figure 2–2 shows the 881 power
controller, used with some RA90/RA92 disk drive storage array products, as viewed from the rear of
the cabinet. Drive power cords are routed through the grommeted cord opening in the front of the
power controller, then plugged into the rear power receptacles of the power controller.
NOTE
A list of related documentation is contained in the front of this manual (refer to the
preface, About This Manual). This list supplies titles and Digital part numbers of
subsystem manuals that contain specific RA90 and RA92 disk drive system cabling and
power cord information.

2.4.1 Installing Internal SDI Cables
Internal SDI cables are installed at the factory for all drive positions in most subsystem
configurations. Refer to subsystem-specific documentation for details about internal SDI cable
routing, connections, and availability.

2.4.2 Installing Internal Power Cords
Internal power cords are installed at the factory and connected to existing drives and the power
controller for your system. Connect add-on drive power cords using the illustrations and procedures
found in your system-specific documentation.

2.4.3 Installing External SDI Cables
When installing external SDI cables from the I/O bulkhead to the host, refer to system-specific
documentation for procedures and illustrations of bulkhead port configurations. Many systems
have an I/O port label adhered to the rear door/panel of the system.

2.5 Power and Safety Precautions
The RA90 and RA92 disk drives do not present any unusual fire or safety hazards. However, it is
recommended that you check ac power wiring for the computer system to determine adequate
capacity for expansion. To protect personnel and equipment, ensure power sources meet the
specifications required for this equipment.
WARNING
Hazardous voltages are present inside the RA90 and RA92 disk drives. Installation and
service must be performed by trained Digital Customer Services personnel. Bodily injury
or equipment damage may result from incorrect servicing.

2–4 Installation

POWER
CONTROLLER

BUS/OFF/ON SWITCH
(CLOCKWISE FROM TOP)
FUSE
LABEL

POWER CONTROL
BUS CONNECTORS

POWER CORD
STRAIN RELIEF

CIRCUIT
BREAKER

J10
I
CB
O

J11
J12
J13

GROMMETED
CORD
OPENING

UNDELAYED
DELAYED
(0.5 SEC)

FUSE

POWER
CORD

SERIAL/LOGO
LABEL
CXO-2136A

Figure 2–2

881 Power Controller (Example)

Installation 2–5

2.6 AC Power Wiring
Three-phase power must be present to support the installation of the 60-inch cabinet. The 40inch cabinet requires single-phase power. Check system-specific documentation for the power
requirements for your system.
The wiring used by Digital Equipment Corporation conforms to UL, CSA, and ISE standards.
Figure 2–3 shows the ac plug configurations for RA90 and RA92 disk drives and the 881 and 874
power controllers.
NOTE
Do not apply power to the power controller until proper voltage has been selected.

2.7 Voltage Selection
Before applying power to the RA90 or RA92 disk drive, ensure the proper voltage has been selected
for your area of operation. The voltage selector is a slide switch capable of selecting 120 volts or
240 volts. (The frequency 60 Hz or 50 Hz is universal.) To select the proper voltage, perform the
following steps:
WARNING
Ensure that both the power controller and drive are operating at the same voltages and
frequencies (120 Vac or 240 Vac).
1. Remove the subsystem cabinet rear access panel.
2. Verify the ac circuit breaker on the power control unit is off.
3. Verify the circuit breaker on each disk drive is off (0) (refer to Figure 2–4).
4. Locate the voltage selector switch (refer to Figure 2–5).
5. Using a non-conductive pointed object, slide the voltage selector switch into the position
applicable to your site.
6. Ensure the drive power cord is plugged into the power controller.
7. Plug the ac power cord from the power controller into an external receptacle.
8. Switch on the ac circuit breaker on the power controller.
9. Switch on (1) the RA90 or RA92 drive circuit breaker (refer to Figure 2–4).

2–6 Installation

POWER CORDS GOING TO POWER CONTROLLER
120V 60HZ
POWER CORD
DEC NO. A-PS-1700083-23
PLUG - POWER CONTROLLER END

240V 50HZ
POWER CORD
DEC NO. A-PS-1700083-24
PLUG - POWER CONTROLLER END

120/240V 47-63HZ
10A/6A
POWER CORD
DEC NO. A-PS-1700442-18 OR
A-PS-1700442-19
PLUG - DRIVE END
PLUGS GOING TO WALL OUTLET (FROM CONTROLLER)
120V 60HZ
24A
1-PHASE

40-INCH
CABINET

NEMA NO. L5-30P
DEC NO. 12-11193
(874-D)

220/240V 50-60HZ
16A
1-PHASE
IEC 309 320-P6W
DEC NO. 12-14379-03
(874-F)

120/208V AC 60HZ
30A
3-PHASE
WYE
USED WITH 881-A AND 881-C
POWER CONTROLLERS

5-WIRE
NEMA NO. L21-30P

220-240/380-415V AC 50HZ
20A OR 16A
3-PHASE
WYE
USED WITH 881-B
POWER CONTROLLER

5-WIRE, 4-POLE,
IEC 309

60-INCH
CABINET

CXO-1872D

Figure 2–3

Electrical Plug Configurations

Installation 2–7

DRIVE
REAR

CIRCUIT
BREAKER

GREEN LED
(POWER OK)

QUARTER-TURN
FASTENER (4)

POWER
SUPPLY
CXO-2134B

Figure 2–4

Drive Circuit Breaker Location

2–8 Installation

DRIVE
REAR
DRIVE
CIRCUIT
BREAKER

AC POWER
INPUT

PORT B
120V
OR
240V

PORT A

VOLTAGE
SELECTOR
SWITCH

POWER
SUPPLY

NOTE: VOLTAGE MARKINGS ON SOME POWER SUPPLIES READ 115/230V.

Figure 2–5

Drive Voltage Selector Switch

CXO-2135D

3
Operating Instructions
3.1 Introduction
This chapter describes the operator control panel (OCP), drive-resident power-up diagnostics,
acceptance tests, and RA90/RA92 disk drive operating modes. Functional flowcharts are included to
aid the user when operating the RA90 or RA92 disk drive.

3.2 OCP Functions, Switches, and Indicators
The OCP is the interface to the RA90/RA92 disk drive. The OCP performs the following functions:
•

Selects and displays the unit address number.

•

Selects Run, Write Protect, Port A, and Port B.

•

Displays faults and error codes.

•

Selects tests in the test mode.

•

Communicates with the RA90 or RA92 master processor.

These functions are executed using the following OCP switches and indicators (refer to Figure 3–1):
•

Six input switches (Run, Fault, Write Protect, Port A, Port B, and Test)

•

Seven LED indicators (Ready, Run, Fault, Write Protect, Port A, Port B, and Test)

•

A four-character alphanumeric display

There are no physical in or out states for the OCP switches. Instead, the logical state of the switch
is changed each time a switch is selected, similar to the way a calculator works.
The switch states are shown in the OCP display. The LED indicators show the state of the drive
relative to the controller.

3.3 Power-Up Diagnostics
Do not select any OCP switches.
A sequence of drive-resident diagnostics run when power is applied to the drive. This sequence
consists of hardcore tests and basic processor tests. Successful completion of these tests is indicated
by a series of OCP displays, as follows:
1. Blank (1 second).
2. [WAIT] (16 seconds).
3. [0000] (If previously programmed, the drive unit number is displayed; otherwise, zeros are
displayed.)

3–1

3–2 Operating Instructions

FOUR-CHARACTER
ALPHANUMERIC
DISPLAY
UNIT
NUMBER

TEST
SWITCH
PORT B
SWITCH
PORT A
SWITCH
WRITE PROTECT
SWITCH
FAULT
SWITCH

STATE LED
INDICATORS

RUN
SWITCH
CXO-2143B

Figure 3–1

RA90/RA92 OCP

Operating Instructions 3–3

3.3.1 Problems at Power-Up
If a problem occurs during power-up, the Fault LED indicator should light. However, if any of the
basic processor functions fail and no front panel activity occurs, perform the following steps:
1. Ensure the OCP is seated properly.
2. Check ac power at the outlet.
3. Ensure the green LED at the rear of the power supply is lit (refer to Figure 3–2).
4. Ensure the power supply is properly seated by checking the four quarter-turn fasteners at the
rear of the power supply. They should be properly secured.
5. Ensure the drive power cord is properly seated at the rear of the supply, and at the power
controller receptacle.
6. Ensure that all drive FRUs are properly seated.
If the previous actions do not reveal the source of the problem, contact your Digital Customer
Services representative.
DRIVE
REAR

CIRCUIT
BREAKER

GREEN LED
(POWER OK)

QUARTER-TURN
FASTENER (4)

POWER
SUPPLY
CXO-2134B

Figure 3–2

Power Supply Indicator

3–4 Operating Instructions

If the Fault LED indicator lights during power-up, enter the fault display mode to determine the
cause of the problem. To enter the fault display mode, select the Fault switch on the OCP. The OCP
then displays a three-character error code in the format [E 00], where 00 is a two-digit error code.
Refer to Table 3–1 for a list of error codes and possible solutions.
Table 3–1 OCP Error Codes
Error

Description

Action

Drive write protected

Disable write protection with the OCP Write Protect switch or
turn off software write protection.

Drive over-temperature
condition

Spin down and remove power from the drive. Ensure cabinet air
vent grill is clean and room temperature is within recommended
limits. Call Digital Customer Services if air vent grill or
temperature has not caused an over-temperature condition.

Power supply overtemperature condition

3A,
6F

Write protect error

Disable write protection with the OCP Write Protect switch or
turn off software write protection.

NOTE
Error codes not found in Table 3–1 indicate problems beyond the scope of this manual.
Call your Digital Customer Services representative. Report the displayed error code
when requesting service.

3.4 Acceptance Testing
Do not select any OCP switches.
After the hardcore diagnostics have run successfully, the drive automatically enters an idle-loop
diagnostic test sequence. This test sequence is indicated by the front panel Test LED indicator
lighting.
Allow the drive to remain spun down and in idle-loop testing for 5 minutes. If you select the Run
switch during this time, the drive will not respond until it has finished its current idle-loop routine.
NOTE
If an error occurs during idle-loop testing, refer to Table 3–1 for possible solutions
and operator actions. Error codes not found in Table 3–1 are beyond the scope of this
manual. Call your Digital Customer Services representative. Report the displayed error
code when requesting service.

3.4.1 Operator Control Panel Lamp Testing
Next, perform an OCP lamp test to ensure the LED indicators and alphanumeric display are
functioning properly. Use the following procedure:
1. Select the Test switch. (The Test LED indicator lights.)
2. Select the Fault switch. (All lamps light momentarily.)
3. Deselect the Test switch.

Operating Instructions 3–5

3.4.2 Testing Spun-Down Drive
The next step in the acceptance test process requires running drive-resident diagnostics with the
drive in a spun-down state. To invoke resident diagnostics while the drive is spun down:
1. Select the Test switch. (The Test LED indicator lights.)
2. Select the Write Protect switch. (The OCP displays [T 00].)
3. Select the Write Protect switch again, to start testing.
The drive is now running a sequence of resident diagnostics. A number of displays are seen during
execution of the diagnostics. Refer to Figure 3–3 for an example of a normal test sequence.
DISPLAY =

DISPLAY =

(START)

DISPLAY =

(COMPLETE)

DISPLAY =

* INDICATES FLASHING DISPLAY
CXO-2195A

Figure 3–3

OCP Displays During Normal Testing

Allow drive diagnostics to complete before continuing acceptance testing. This will take about 2
minutes and terminate with a [T 00] display.
NOTE
If an error occurs, refer to Table 3–1 for possible solutions and operator actions. Error
codes not found in Table 3–1 indicate problems beyond the scope of this manual. Contact
your Digital Customer Services representative. Report the displayed error code when
requesting service.

3.4.3 Testing Spun-Up Drive
To spin up the drive:
1. Deselect the Test switch. (The Test LED indicator extinguishes and the unit address (if
programmed) is displayed.)
2. Select the Run switch. (An R appears in the OCP display, and the Run LED indicator lights.)
Allow the drive to reach the ready state, as indicated by the front panel Ready LED indicator.
The steps that follow invoke a sequence of resident diagnostic tests. These tests check drive
functions in the following areas:
•

Processor

•

Servo bus

3–6 Operating Instructions
•

Positioner

•

Head select

•

Read/Write circuitry

•

Fault detection circuitry

To invoke resident diagnostics while the drive is spun up:
1. Select the Test switch. (Test LED indicator lights.)
2. Select the Write Protect switch. (The OCP displays [T 00].)
3. Select the Write Protect switch again, to start testing.
Allow the tests to run to completion (about 8 minutes). To halt testing:
1. Select the Port A or Port B switch.
2. Select the Test switch.
The drive exits the test mode and the OCP displays an R with the Ready and Run LED indicators
illuminated. The drive can now be placed on line, assuming no problems have been encountered.
NOTE
If an error occurs, refer to Table 3–1 for possible solutions and operator actions. Error
codes not found in Table 3–1 indicate problems beyond the scope of this manual. Contact
your Digital Customer Services representative. Report the displayed error code when
requesting service.

3.5 Programming the Drive Unit Address
The unit address can be set once power has been applied to the drive. You must set the drive unit
address before placing the RA90 or RA92 disk drive on line.
The RA90 or RA92 unit address is programmable from 0 to 4094. (Remember that the operating
system or subsystem type can limit the unit address range.)
Use the following procedure to set the drive unit address. Refer to Figure 3–4 for a flowchart of this
procedure.
1. Select the Test switch. (The Test LED indicator lights and a unit address (if previously
programmed) is displayed; otherwise, zeros are displayed.)
2. Select the Port A switch for the ones position. (Position zero blinks.)
3. Select the Port B switch. (Position zero increments 1 through 9 every time Port B is selected.)
4. Select the Port A switch for the tens position. (Position one blinks.)
5. Select the Port B switch. (Position one increments 1 through 9 every time Port B is selected.)
6. Select the Port A switch for the hundreds position. (Position two blinks.)
7. Select the Port B switch. (Position two increments 1 through 9 every time Port B is selected.)
8. Select the Port A switch for the thousands position. (Position three blinks.)
9. Select the Port B switch. (Position three increments 1 through 4 every time Port B is selected.)
10. Select the Test switch to exit.

Operating Instructions 3–7

NORMAL MODE

DISPLAY =

INCREMENT
NUMBERS 0-9
BY SELECTING
PORT B
SWITCH

DESELECT
PORT A AND
B TO SET UNIT
ADDRESS

DISPLAY =

SELECT
PORT A
SWITCH

R
DISPLAY =

SELECT TEST
SWITCH (TEST
LED LIGHTS)

INCREMENT
NUMBERS 0-4
BY SELECTING
PORT B
SWITCH

SELECT
PORT A
SWITCH

DISPLAY =

[

DISPLAY =

Unit Address Programming Flowchart

[

]

TO SAVE NEW
ADDRESS ,
SELECT [ Y ]
AND EXIT BY
SELECTING
TEST SWITCH

DISPLAY =

Figure 3–4

]

TO SAVE OLD
ADDRESS, SELECT
[N] AND EXIT BY
SELECTING TEST
SWITCH

SELECT
TEST
SWITCH

* INDICATES FLASHING READOUT

SELECT PORT
B SWITCH
TO TOGGLE
(Y) OR (N)

DISPLAY =

SELECT
PORT A
SWITCH

INCREMENT
NUMBERS 0-9
BY SELECTING
PORT B
SWITCH

DISPLAY =

INCREMENT
NUMBERS 0-9
BY SELECTING
PORT B
SWITCH

SELECT
PORT A
SWITCH

DISPLAY =

THE FOLLOWING
IS A SCROLLING
DISPLAY. TO
STOP DISPLAY,
SELECT RUN
SWITCH

[

]

CXO-2138A

3–8 Operating Instructions

At this point, the OCP prompts you to verify that you want to change the unit address. The
following prompt scrolls through the OCP display:
CHG UNT # {? [N]}
•

If you do not want to change the unit address, select the Test switch a second time. The drive
returns to normal mode.

•

To change the unit address:
1. Toggle the Port B switch. (The OCP displays {? [Y]}.)
2. Select the Test switch.

The old unit address is overwritten with the new address. The new unit address is displayed in the
OCP.
NOTE
The new unit address is written to EEPROM and is not lost if the drive loses power.

3.5.1 Alternate Unit Address Display Mode
Future RA90 and RA92 disk drives will incorporate a microcode enhancement that will provide
an alternate unit address display mode. To display the unit address, refer to Figure 3–5 while
performing the following procedure:
1. The OCP display shows an R, A, and/or B.
2. While in normal mode, select the Port A and/or Port B switch.
3. Select the Test switch. At this point, the Run, Fault, Write Protect, Port A, and Port B switches
are disabled.
4. The unit address is displayed until:
•

The Test switch is deselected.

•

Power is cycled.

•

An SDI HARD INIT occurs, or the drive forces a hard initialization due to a fatal error.

Any of these conditions will clear the OCP from the alternate display mode.

3.6 RA90/RA92 Operating Modes
The RA90 and RA92 disk drives operate in three set-up modes: normal, fault display, and test. The
following sections describe the functions of each mode.

3.6.1 Normal Mode Setup
The normal mode setup is the usual operating mode of the RA90 and RA92 disk drives. Switch
selection during normal operation usually consists of the Run switch, Write Protect switch (for
normal write protection), and Port A or B switches. No Fault or Test LED indicators are lit.
During normal operations:
•

Selecting the Run switch causes an R to appear in the OCP display and causes the drive to spin
up. Additionally, the Run LED indicator lights. The Ready LED indicator lights once the drive
is up to speed.

Operating Instructions 3–9

NORMAL MODE

DISPLAY=

TEST
SWITCH
SELECTED
?

YES
R F W A B
FUNCTIONS
DISABLED

DISPLAY=

TEST
SWITCH
DESELECTED
?

YES
ENABLES
ALL
SWITCHES
CXO-2958A

Figure 3–5

Alternate Unit Address Display Mode Flowchart

•

Selecting the Port A or Port B switch causes an A or B to appear in the OCP display and
logically makes the drive available to the controller.

•

Selecting the Write Protect switch logically write protects the drive and lights the Write Protect
LED indicator.

•

Selecting the Fault switch:
–

(Without a fault indication) causes a 2-second OCP lamp test.

–

(With a fault indication) causes an error code to display. Selecting the Fault switch a second
time (with a fault indication) clears the fault.

3–10 Operating Instructions

•

Selecting the Test switch:
–

(With the Port A or Port B switch selected) causes a 2-second display of the unit address.
(Refer to Section 3.5.1 for information on the alternate unit address display mode.)

–

(Without the Port A or Port B switch selected) causes the drive to enter the test mode.

3.6.2 Fault Display Mode Setup
To enter the fault display mode, select the Fault switch. The fault display mode can only be entered
if the Fault LED indicator is lit; otherwise, selecting the Fault switch causes a 2-second OCP lamp
test.
An error code is displayed in the format shown in Figure 3–6. To exit the fault display mode and
clear the fault, select the Fault switch a second time.
NOTE
Hard faults will not clear. If a hard fault occurs, note the error code and contact Digital
Customer Services.

DISPLAY =

CXO-2190A

Figure 3–6

Fault Display Example

Refer to Figure 3–7 for a fault display mode flowchart.

Operating Instructions 3–11

NORMAL MODE

DISPLAY=

FAULT
INDICATION
ON DRIVE
?

SELECT
FAULT
SWITCH

YES
OCP LAMP
TEST
(2 SEC)

SELECT
FAULT
SWITCH

*DISPLAY=

SELECT
FAULT
SWITCH

FAULT
CLEARS

NORMAL MODE

*NOTE: ANY COMBINATION OF LEGAL ALPHANUMERIC ERROR CODES (HEX).
CXO-2191B

Figure 3–7

Fault Mode Flowchart

3–12 Operating Instructions

3.6.3 Test Mode Setup
You must enter the test mode to set the RA90 or RA92 unit address or to run resident diagnostic
tests. In this mode, Port A and Port B switches have the function of selecting both the unit address
numbers and test numbers. In addition, the port switches are used to abort running diagnostics.
The Write Protect switch starts the tests and the Port A or Port B switches stop selected tests.
The test mode is characterized by three displays. Figure 3–8 shows an OCP after test selection is
made. Figure 3–9 shows a display while the test is running.

DISPLAY =

* INDICATES FLASHING DISPLAY
CXO-2192A

Figure 3–8

RA90/RA92 Test Display
DISPLAY =

DISPLAY =

(START)

DISPLAY =

(COMPLETE)

DISPLAY =

* INDICATES FLASHING DISPLAY
CXO-2137A

Figure 3–9

Running Test OCP Display

4
Diagnostics
4.1 General Information
This chapter contains general information concerning drive-resident diagnostics and acceptance
testing procedures.

4.2 Drive-Resident Diagnostics
Drive-resident diagnostics are invoked under four conditions:
•

Power-up or master processor reset

•

External init (SDI command)

•

Operator control panel (OCP) test mode selection

•

Functional firmware sequences (idle loop)

Drive-resident diagnostics test three hardware areas. These areas are:
•

Hardcore (CPU, ROM, RAM, SCI, and timer)

•

Logic (processor board, servo board, and PCM board)

•

Functional (guardband detect, seek/timing, and read/write)

4.2.1 Power-Up Resident Diagnostics
The drive-resident diagnostics that run at power-up or master processor reset run without manual
intervention in the following order:
•

Master CPU test

•

Master ROM test

•

Master RAM test

•

Master timer test

•

Servo data bus loopback test

•

Head select test

4–1

4–2 Diagnostics

4.3 Test Selection from the OCP
Use the following procedure to select and run resident diagnostics from the OCP (refer to
Figure 4–1):
1. Select the Test switch. (Test defaults to zero.)
2. Select the Write Protect switch to initiate resident diagnostics.
3. Select the diagnostic using Port A and Port B switches (refer to Figure 4–1).
4. Start the test by selecting the Write Protect switch.
5. Stop the test by selecting the Port A or Port B switch.
6. Restart the test by selecting the Write Protect switch again.
7. Select the Test switch to exit the test mode.
Run the resident diagnostics from the OCP in the following order:
1. Test T 00: Drive spun down.
2. Test T 00: Drive spun up.

Diagnostics 4–3

NORMAL MODE

DISPLAY =

SELECT PORT
SWITCHES TO
DESELECT
PORTS(S)

DISPLAY =

SELECT PORT A
SWITCH (MSD
BEGINS FLASHING)

DISPLAY =

SELECT WRITE
PROTECT SWITCH

SELECT PORT
A SWITCH
(LSD BEGINS
FLASHING)

DISPLAY =

INCREMENT
NUMBERS 0-9
BY SELECTING
PORT B
SWITCH

* INDICATES FLASHING READOUT

Figure 4–1

INCREMENT
NUMBERS 0-9
BY SELECTING
PORT B
SWITCH

SELECT TEST
SWITCH (TEST
LED LIGHTS)

DISPLAY =

Test Selection Flowchart

SELECT WRITE
PROTECT SWITCH
(TEST STARTS)

DISPLAY =

(START)

DISPLAY =

(COMPLETE)

DISPLAY =

DIAG CAN BE STOPPED
BY SELECTING PORT A
OR PORT B, RESTARTED
BY SELECTING WRITE
PROTECT, OR EXITED
BY SELECTING TEST
SWITCH

CXO-2139B

A
Customer Equipment Maintenance
This appendix will assist customers in maintaining their equipment to ensure the highest level of
equipment performance and reliability. Specifically, this appendix addresses the maintenance of
SA6xx/SA8xx storage array cabinet systems.

A.1 Customer Responsibilities
The customer is directly responsible for:
•

Supplying accessories, including storage racks, cabinetry, tables and chairs, as required.

•

Making the appropriate documentation available in a location convenient to the system.

•

Obtaining cleaning supplies specified in this appendix.

•

Performing the specific equipment maintenance described in this appendix.

A.1.1 Cleaning Supplies
To properly maintain the equipment, the customer must acquire the following items and supplies:
•

Vacuum cleaner with flexible hose and nonmetallic, soft-bristle brush attachment

•

Isopropyl alcohol (at least 91%) (Digital P/N 29-19665)

•

Lint-free tissues or cloths

•

All-purpose spray cleaner
CAUTION
When using spray cleaner, do not spray cleaner directly into computer equipment.
This could adversely affect equipment reliability or damage electrical components.

A.1.2 Ongoing Equipment Care
The following should be performed on an ongoing basis:
•

Keep the immediate area in front of the storage array cabinets free of obstructions.

•

Keep the exterior of the cabinets and the surrounding area clean. Use a lint-free cloth and
isopropyl alcohol to remove sticky residue left on painted surfaces by customer cabinet number
labels, and so forth.

•

Maintain the site temperature/humidity to comply with Digital’s recommended environmental
range (reference product-specific documentation). This will ensure the highest product
reliability and product life goals are achieved.

A–1

A–2 Customer Equipment Maintenance

A.1.3 Monthly Equipment Maintenance
The following tasks should be performed on a monthly basis, or more often if environment warrants:
CAUTION
Avoid touching the operator control panel switches during cleaning operations. The
state of the drives could change and affect the operation of the subsystem.
•

Vacuum and/or wipe top of storage array cabinet with a lint-free cloth.

•

With a soft-bristle brush attachment, vacuum the air vent grill on the front door of the storage
array cabinet. Leave the front door assembly attached to the storage array cabinet while
vacuuming.

A.1.4 Maintenance Records
Digital suggests the customer keep an accurate log of all equipment maintenance. A maintenance
log form for SA6xx/SA8xx storage array cabinets is included in this appendix for customer use. This
form may be reproduced and inserted in the customer’s site management guide for record-keeping
purposes.

Customer Equipment Maintenance A–3

CUSTOMER EQUIPMENT MAINTENANCE LOG
FOR STORAGE ARRAY CABINETS
DATE OF
SERVICE

TYPE OF SERVICE PERFORMED

CABINET S/N

CABINET S/N CABINET S/N

CXO-2964A

Index
A

Acceptance testing, 3–4
AC power wiring, 2–5

Hardware maintainability, 1–1
HDA, 1–1

Backing up data, 1–4
file duplication, 1–4
journaling, 1–4

I/O port label, location, 2–3
Idle-loop, 1–3
Input current (amps), 1–8
Inrush current, 1–8

C
Configuration, RA90/RA92 subsystem,
1–1
Controller, 881 power, 2–4
Customer equipment maintenance, A–1
Customer equipment maintenance log,
A–3

L
Latency, 1–7

M
Maintenance strategy, 1–5

Data rates, 1–7
Description, RA90, RA92 disk drives, 1–1
Diagnostics
drive-resident, 1–1, 1–3, 4–1
sequence, 4–1
Documentation, related, vii
DSA/SDI compatibility, 1–1
Dual-port configuration, 1–2

OCP
functions, 3–1
lamp testing, 3–4
switches and indicators, 3–1
Operating modes, RA90/RA92, 3–8
fault display mode setup, 3–10
normal mode setup, 3–8
test mode setup, 3–12
Operator control panel
See OCP

E
Electrical specifications, 1–8
Electrostatic discharge, 1–5
Environmental limits
maximum, 1–9
recommended, 1–9
ESD wrist strap, 1–5

G
Grounding, static protection, 1–5

P
Physical characteristics, 1–7
Power cord installation, internal, 2–3
Power dissipation, 1–8
Power precautions, 2–3
Power up
problems, 3–3
resident diagnostics, 1–3, 3–1, 4–1
Preventive maintenance, 1–1
Programming drive unit address, 3–6

Index 1

2 Index

R
Related documentation, vii

S
Safety precautions, 2–3
SDI cable installation
external, 2–3
internal, 2–3
Seek times, 1–7
Site preparation and planning
environment, 2–1
floor loading, 2–1
operating temperature and humidity,
2–1
power requirements, 2–1
Specifications
RA90 and RA92 disk drives, 1–5
Start/stop time, 1–7

T
Temperature, operating recommendations,
1–4
Testing
spun-down drive, 3–5
spun-up drive, 3–5
Test selection from the OCP, 4–2
Thermal stabilization, 2–1

U
Unit address
alternate display mode, 3–8
programming from the OCP, 3–6
Unpacking add-on disk drives, 2–1
User precautions/recommendations, 1–3

V
Voltage selector switch, 2–5