CORVUS H-Series User manual

THE CORVUS SERVICE MANUAL
H-Series Drives
*\ CORVUSSYSTEMS
**

DISCLAIMER OF ALL WARRANTIES &LIABILITIES
Corvus Systems, Inc. makes no warranties, either expressed or implied, with respect to this
manual or with respect to the software described in this manual, its qUality, performance, mer-
chantability, or fitness for any particular purpose. Corvus Systems, Inc. software is sold or
licensed lias is:' The entire risk as to its quality or performance is with the buyer and not Corvus
Systems, Inc., its distributor, or its retailer. The buyer assumes the entire cost of all necessary
servicing, repair, or correction and any incidental or consequential damages. In no event will
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Corvus Systems, Inc. has been advised of the possibility of such damages. Some states do not
consequential damages, so the above limitation may not apply to you.
Every effort has been made to insure that this manual accurately documents the operation and
servicing of Corvus products. However, due to the ongoing modification and update of the soft-
ware along with future products, Corvus Systems, Inc. cannot guarantee the accuracy of printed
material after the date of publication, nor can Corvus Systems, Inc. accept responsibility for
errors or omissions.
NOTICE
Corvus Systems, Inc. reserves the right to make changes in the product described in this man-
ual at any time without notice. Revised manuals and update sheets will be published as needed
and may be purchased by writing to:
Corvus Systems, Inc.
2029 O'Toole
Avenue
San Jose, CA 95131
Telephone: [phone]
TWX 910-338-0226
This
manual is copyrighted and contains proprietary information. All rights reserved. This docu-
ment may not, in whole or in part be copied, photocopied, reproduced, translated or reduced to
any electronic medium or machine readable form without prior consent, in writing, from
Corvus Systems, Inc.
Copyright© 1982
by Corvus Systems, Inc. All rights reserved.
Mirror® patent pending, The Corvus Concept,T. Transporter,T. Corvus OMNINET,T. Corvus
Logicalc,T. Time Travel Editing,T. EdWord,T. Constellation,T. Corvus,T. Corvus Systems,T. Personal
Workstation,"" Tap Box,'· Passive Tap Box,T. Active Junction Box,T. Omninet Unif· are trademarks
of Corvus Systems, Inc.
FCC WARNING
This equipment generates, uses, and can radiate radio frequency energy and if not installed and
used in accordance with the instruction manual, may cause interference to radio communica-
tions. As temporarily permitted by regulation it has not been tested for compliance with the
limits for Class A computing devices pursuant to Subpart Jof Part 15 of FCC Rules, which are
designed to provide reasonable protection against such interference. Operation of this equip-
ment in aresidential area is likely to cause interference in which case the user at his own
expense will be required to take whatever measures may be required to correct the interference.

CORVUS DEALER SERVICE
CORVUS SYSTEMS
H-SERIES 5.25-INCH
WINCHESTER DISK DRIVE
SERVICE MANUAL
COVERING
MODEL 6, MODEL 11, MODEL
20
This document contains three types of notations. These are, in increasing order of importance,
NOTE, CAUTION, and WARNING. The NOTE indicates some action to be taken to speed or
simplify a procedure. The CAUTION indicates that potential damage to the equipment or user
data exists, and care should be taken to avoid this. The WARNING indicates that potential harm
or injury to the service technician or operator exists, and extreme care should be taken to
avoid these.
PART NO. 7100-04704
PUBLICATION NO. GEN/10.3-01/l.1
PUBLICATION DATE APRIL
I, 1983

CORVUS DEALER SERVICE
TABLE OF CONTENTS

CORVUS DEALER SERVICE
TABLE OF CONTENTS
List of Figures and Tables v
List
of Assembly and Schematic Drawings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. vi
Specifications ... '. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. vii
CHAPTER 1 - GENERAL DESCRIPTION
1.1 Scope of Chapter ' . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1
1.2 Introduction 1
1.3 Purpose of Equipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1
1.4 Model Identification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1
1.5 Corvus Disk System 2
1.5.1 Power Supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2
1.5.2 Data Backup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2
1.6 Winchester Disk Drive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2
CHAPTER 2 - INSTALLATION
2.1 Scope of Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3
2.2 Introduction 3
2.3 Receiving a Drive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . .. 3
2.3.1
Diagnostic Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3
2.4 Environmental Considerations 5
2.5 Daisy-Chaining of Disk Drives 5
CHAPTER 3 - OPERATION
3.1 Scope of Chapter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 7
3.2 Introduction 7
3.3 Controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 7
3.3.1 Front Bezel LEOs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 7
3.3.2 Front Bezel Switches. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 7
3.4 Power-On Sequence 8
3.5 Environn1ental Requirements 8
3.5.1 Static Electricity 8
3.5.2 Line Noise 9
3.5.3 Temperature 9
3.6 Periodic Maintenance 9
3.6.1 Regular Checks 9
CHAPTER 4 - DRIVE DESCRIPTION
4.1 Scope of Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 10
4.2 Introduction 10
4.3 Drive Layout 10
4.3.1 Power Supply , 10
4.3.2 dc Power Cables 11
4.4 General Description 11
4.5 Disk Sealed Mechanism 12
4.6 Controller Firmware 12
4.7 Data Storage 12

CORVUS DEALER SERVICE
4.8 Transportation Considerations 14
4.9
Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 14
4.9.1
Power- Up 14
4.9.2
Controller PCA ".. ... .. 16
4.9.2.1
Controller During Seek 16
4.9.2.2
Controller During Read and Write 16
4.9.3 Backplane
PCA 18
4.9.4 Paddleboard
PCA 18
4.9.5
Interface PCA 18
4.9.6 Read/Write
PCA 19
4.9.7
Motor Control PCA 19
CHAPTER 5 - DISASSEMBLY
5.1 Scope of Chapter ......................................................•.................... 20
5.2 Introduction 20
5.2.1 Tools Required "20
5.3 Plastic Package " 20
5.3.1 Top Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 20
5.3.2 Controller PCA 20
5.3.3 Backplane Cover 21
5.3.4 Drive Mechanism 21
5.3.5 Read/Write PCA 21
5.3.6 Motor Control PCA 21
5.3.7 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . .. 24
5.3.8 Front Bezel ..................................................................... .. 24
CHAPTER 6 - ADJUSTMENTS AND MAINTENANCE
6.1 Scope of Chapter 25
6.2 Introduction ". . . . . . .. ....................... .. 25
6.3
Power Supply Voltage Check and Adjustment 25
6.3.1 Voltage Check (CP510) 25
6.3.2 Voltage Adjustment 25
6.4
Motor Brake Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 26
6.5 Index Sensor Adjustment 28
CHAPTER 7 - DEALER SERVICE DIAGNOSTICS
7.1 Scope of Chapter 30
7.2 Introduction 30
7.3 Drive Diagnostics RevB 30
7.3.1 CRC 30
7.3.2 EXR 31
7.3.3
UPD 31
7.3.4 VSN "31
7.3.5
FMT 32
7.3.6 PRM 32
7.3.6.1 MUX 32
7.3.6.2 DRIVE
33
7.3.7 SET 33
7.3.8 PARK 33
7.3.9 QUIT 33
ii

CORVUS DEALER SERVICE
7.4 Controller Diagnostic 34
7.4.1 General Description 34
7.4.2 Controller Diagnostic Commands 34
7.4.2.1 A) Abort Diagnostic 34
7.4.2.2 B) Macro Menu 35
7.4.2.3 C) Change Slot Number 35
7.4.2.4 D) Download Diagnostic " 35
7.4.2.5 I) Analyze Servo 36
7. 4.2.6 J) Single Do Seek " 36
7.4.2.7 L) Full Cylinder Loopseek 36
7.4.2.8 P) Print Quiet Summary Report " 36
7.4.2.9 Q) Sector Quiet Program " 36
7.4.2.10 S) Read Scan Disk " 37
7.4.2.11 T) Single Cylinder Seek Scan 37
7.4.2.12 X) Write Scan Disk 37
7.4.2.13 Y) Rezero Heads 37
7.4.3 Error Codes 38
7.5 Burn-In Program " 38
7.5.1 C)ONT 38
7.5.2 L)IST 38
7.5.3 R)ESTART 38
7.5.4 Q)UIT 39
7.6 Read Burn-In Results 39
7.7 Track Diagnostic 39
7.7.1 C)ONT 39
7.7.2 L)IST 39
7.7.3 R)ESTART 40
7.7.4 Q)UIT 40
CHAPTER 8 - FAULT ISOLATION PROCEDURES
8.1 Scope of Chapter 41
8.2 Introduction 41
8.3 Tools 41
8.4 Error Codes "41
8.4.1
Interpreting Error Codes 41
8.5 Troubleshooting Procedures 45
8.5.1 On-Site Checks 45
8.5.2 Isolate the Problem " 45
8.5.3 Drive Not Ready " " 46
8.5.3.1 Interface 46
8.5.3.2 Controller Firmware 46
8.5.3.3 Power Supply Voltages " 46
8.5.3.4 Drive Electronics 46
8.5.3.5 Drive Sealed Mechanism 47
8.5.4 Link Inoperative , " 47
8.5.4.1 Check Link Action , 47
8.5.4.2 Power Supply 47
8.5.4.3 CRC Test 47
8.5.4.4 Controller Communication " 48
8.5.4.5 Servo Action 48
8.5.4.6 Controller Firmware , 48
iii

CORVUS DEALER SERVICE
8.5.4.6 Boot ROM 48
8.5.4.7 Interface Components 48
8.5.4.8 Drive Initialization 48
8.6 Final Adjustments and Tests 49
8.6.1 CRC Test ~ 49
8.b.:? Install and Test Mirror 49
8.6.3 CRC Test ~ 49
8.6.4 Power Supply 49
8.6.5 Burn-In Test 49
8.7 Trouble Shooting Flowchart 50
8.8 Common Symptoms and Recommended Solutions 51
Appendix A
Appendix B
Appendix C
Glossary 56
H-Series Parts List 58
Internal Cabling Chart 59
iv