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
Corvus Systems, Inc. be liable for direct, indirect, incidental or consequential damages, even if
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

CORVUS DEALER SERVICE
LIST OF FIGURES AND TABLES

Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure
11
Figure 12
Figure 13
Figure 14
Figure 15
Table 1
Table 2
Table 3
CORVUS DEALER SERVICE
LIST OF FIGURES AND TABLES
Illustrations
H-series drive 1
Mirror switches. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 4
Rear bezel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5
Controller address switches 6
Front bezel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 8
Data configuration 11
Drive mechanism components 13
Sector interleaving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 14
Drive mechanism block diagram 15
Stepper motor assembly 17
Read/Write PCA removal 22
Motor Control PCA removal 23
CPSI0 power supply 26
Bra.ke mechanism adjustment 27
Index sensor adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 29
Tables
Decimal disk error codes 42
Hexidecimal disk error codes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 43
Signed decimal disk error codes 44
v

CORVUS DEALER SERVICE
LIST OF ASSEMBLY AND SCHEMATIC DRAWINGS

CORVUS DEALER SERVICE
LIST OF ASSEMBLY AND SCHEMATIC DRAWINGS
Final Assembly, H-Drive 60
Base Assembly, H-IJrive. ......................................................................... .. 61
Cover Assembly, H-Drive 62
Backplane Assembly,
H-Drive .63
CP5IO
Power Supply Assembly. 64
CP 510 Power Supply Schematic ................................................................... .. 65
CP5IO
Power Supply Parts List (1 of 2) 66
CP5IO
Power Supply Parts List (2 of 2) 67
Controller PCA, PIN 263-02323-xxx Schematic (1 of 6) 68
Controller PCA, PIN 263-02323-xxx Schematic (2 of 6) 69
Controller PCA, PIN 263-02323-xxx Schematic (3 of 6) 70
Controller PCA, PIN 263-02323-xxx Schematic (4 of 6) 71
Controller PCA, PIN 263-02323-xxx Schematic (5 of 6) 72
Controller PCA, PIN 263-02323-xxx Schematic (6 of 6) 73
Controller PCA, PIN 263-02323-xxx Assembly. ...................................................... .. 74
Motor Control PCA, PIN 263-024IO-xxx Schematic. .......................................... .. (1 of 2) 75
Motor Control PCA, PIN 263-024IO-xxx Schematic. .................................... .. . . . . .. (2 of 2) 76
Motor Control PCA, PIN 263-024IO-xxx Assembly 77
Motor Control PCA, PIN 263-0I908-xxx Schematic. . . .. ................................ .. . . . . .. (1 of 2) 78
Motor Control PCA, PIN 263-0I908-xxx Schematic. . . . . .. . . . . . . .. . . .. ... .. ................... .. (2 of 2) 79
Motor Control PCA, PIN 263-0I908-xxx Assembly. . . . . .. ........... .. .................. .. . . . . . . . . . . .. 80
Read/Write PCA, PIN 263-0238I-xxx Schematic .............................................. .. (1 of 3) 81
Read/Write PCA, PIN 263-0238I-xxx Schematic .............................................. .. (2 of 3) 82
Read/Write PCA, PIN 263-0238I-xxx Schematic ..............................................
.. (3 of 3) 83
'Read/Write PCA, PIN 263-0238I-xxx
Assembly. . . .... . .. . . . . .... . . . . . . . . . . .. .............. .. ....... .. 84
Read/Write PCA, PIN 263-02I57-xxx
Schematic. . . .. . . . .. . . . . .. . ...... . . . .. . . . . . .. .. . . . .... (1 of 3) 85
Read/Write PCA,
PIN 263-02I57-xxx Schematic (2 of 3) 86
Read/Write PCA, PIN 263-02I57-xxx Schematic
(3 of 3) 87
Read/Write PCA,
PIN 263-02I57-xxx Assembly. ..................................................... .. 88
vi

CORVUS DEALER SERVICE
SPECIFICATIONS

CORVUS DEALER SERVICE
SPECIFICATIONS
Operational Specifications
Disks per Drive
Disk Diameter (in/mm)
Data Surfaces per Drive
Heads per Surface
Data Heads
Number of Data Cylinders/Drive
(including all spare tracks)
Sectors per Track
Track
Density (TPI)
Bytes per Sector (Formatted)
Bytes per Track (Formatted)
Bytes per Drive (Formatted)
Bit Density, maximum (BPI)
Average Latency (ms)
Average Access Time (ms)
Maximum Access Time (ms)
Maximum Access Time, single-track
Data Transfer Rate (Kb/s)
Recording Format
Rota tional Speed (RPM)
Start Time (s)
Stop Time (s)
Physical Dimensions
Height (in/cm)
Length (in/cm)
Width (in/cm)
Weight Obs/kgs)
MODEL 6
1
5.25/133
2
1
2
306
20
303
512
10,240
6.27MB
9,706
8.3
49
99
3
625
MFM
3,600
20
15
MODEL 11
2
5.25/133
4
1
4
306
20
303
512
10,240
12.53MB
9,706
8.35
49
99
3
625
MFM
3,600
20
15
5.75 /14.6
15.0/38.1
12.0/30.5
MODEL 20
3
5.25/133
6
1
6
306
20
303
512
10,240
18.80MB
9,706
8.3
49
99
3
625
MFM
3,600
20
15
Environmental Requirements
Operating Temperature (F/C)
Non-Operating Temperature (F/C)
Operating Relative Humidity (%)
Non-Operating Relative Humidity (%)
Operating altitude (ft)
Non-Operating altitude (ft)
Operating Vibration (g)
Non-Operating Vibration (g)
Non-Operating Shock (g)
39
0
to 122
0/40
to 50
0
-40
0
to 140
01-400
to 60
0
8 to 80
8 to 80
-1,000 to +10,000
-1,000
to +50,000
0.1 (5 cps linear increase to 100 cps)
1.0 (2 cps
linear increase to 100 cps)
5.0 for 5ms duration
vii

Power Requirements
Line Voltage, Domestic (VAC)
Line Voltage, Foreign (VAC)
Power Consumption (Watts)
Line
Fuse (Amperes)
for 100V-120V
for 220V-240V
Reliability
Mean Time Between Failures (MTBF)
Maximum Repair Time
CORVUS DEALER SERVICE
100-120, 48Hz-62Hz, Single-Phase
220-240, 48Hz-62Hz, Single-Phase
125
2.0 slow-blow
1.0 slow-blow
10,000+ operational hrs., within above
requirements
Not more than 0.5 hrs.
viii

CORVUS DEALER SERVICE
CHAPTER 1
GENERAL DESCRIPTION

CORVUS DEALER SERVICE
Figure L H-Series Drive

CORVUS DEALER SERVICE
CHAPTER 1
GENERAL DESCRIPTION
General Description
1.1 Scope of Chapter
This chapter outlines the purpose of the Corvus Systems ™ H-Series ™ Model 6, Modellland Model20disk drives. A
Brief description
and layout is include, as is adefinition of Winchester technology.
1..2 Introduction
This document contains instructions for maintenance and repair of the Corvus Systems H-Series, 5. 25-inchdisk drive.
Repair
procedures for A-series (8-indl, II-megabyte Rev A) drives and B-series (8-inch, 11- and 20-megabyte Rev B,
and all non-H-Series, 5.25-inch, 6-megabyte) drives as are networks and other Corvus equipment. Corvus (tm) Level I
Dealer Service is on a modular replacement basis, and this manual is written to address this policy.
The H-Series drives are manufactured in three capacities: 6-megabytes (Model 6), 12-megabytes (Model II), and
18-megabytes (Model 20). These drives all use the same grey high-impact foam-injection plastic cabinet. This is the
same drive enclosure used by several of the B-series, 5.25-inch, 6-megabyte drives. Checking the serial number will
identify the type of drive to be serviced. Instructions for troubleshooting and repair for all H-Series drives are detailed
in this document.
Also included in this manual is documentation on the Dealer Service Diagnostic Utilities supplied to each Corvus
Servicing dealer. These utilities provide for burn-in/reliability testing, adjustment, and troubleshooting of all Corvus
disk drives. The initialization and diagnostic utilities for the H-Series drives are unique to the H-Series, and contain
software specific to these drive models. Use the appropriate A-, B- and H-Series software only for the proper drives.
Installation and operation of the disk drive are not covered in detail in this manual. For instructions in installation and
operation, see the Corvus "Disk Systems Installation Guide" and Corvus "Disk Systems User Guide."
1..3 Purpose of Equipment
The Corvus disk drive is a high-speed, intelligent mass-storage peripheral disk device designed to provide the host
microcomputer with storage and ret rival of digital information instantly at the request of the host system. The Corvus
disk system consists of the 5.25-inch disk mechansim, a Z_80™ intelligent controller and power supply, and may be
ordered with a host interface, 34-pin interface flatcable and Corvus Utility diskettes.
1.4 Model Identification
The three Corvus H-Series disk drives are identical, differing only in the internal layout of the drivesealed mechansim.
The Model 6 uses one platter, the Model 11 uses two, and the Model 20 uses three. The drive type, capacity, and
manufacture date may be determined from the serial number tag located at the rear of the drive cabinet.
The following is a sample serial number to be found on a Corvus H-Series, Model 11 disk drive:
023-BH350/M
and is decoded below:
02
represents the week of manufacture (week 02)
3
represents the year of manufacture (3 for 1983)
B
represents aModel 11 drive (A=Model 6, C=Model 20)
H represents an H-Series drive
350 represents the serial number of that years' manufacture
/M represents that this drive was shipped with a Mirror™ installed internally
Whenever communicating with Corvus in reference to Corvus products, include the serial number of the equipment
involved.
"'Corvus Systems is a registered trademark of Corvus Systems, Inc.
"'Mirror is a registered trademark of Corvus Systems, Inc.
™H-Series
is a registered trademark of Corvus Systems, Inc.
TI'Z-80
is a registered trademark of Zilog, Inc.
1