IBM DCAS-32160 - Ultrastar 2.1 GB Hard Drive User manual

IBML
OEM HARD DISK DRIVE SPECIFICATIONS for
DCAS-34330 / DCAS-32160
SCSI-3 FAST-20 50/68/80-pin
3.5-Inch Hard Disk Drive ( 4330 / 2160 MB )
Revision (1.2)
S73H-7993-03

IBML
OEM HARD DISK DRIVE SPECIFICATIONS for
DCAS-34330 / DCAS-32160
SCSI-3 FAST-20 50/68/80-pin
3.5-Inch Hard Disk Drive ( 4330 / 2160 MB )
Revision (1.2)
S73H-7993-03

1st Edition (Rev.0.1) S73H-7993-00 (Aug. 30, 1996) Preliminary
2nd Edition (Rev.1.0) S73H-7993-01 (Sep. 26, 1996)
3rd Edition (Rev.1.1) S73H-7993-02 (Oct. 29, 1996)
4th Edition (Rev.1.2) S73H-7993-03 (Dec. 18, 1996)
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 Copyright International Business Machines Corporation 1996. All rights reserved.
Note to U.S. Government Users —Documentation related to restricted rights —Use, duplication or disclosure is
subject to restrictions set forth in GSA ADP Schedule Contract with IBM Corp.

Contents
1.0 General ...................................................... 1
1.1 Introduction ................................................... 1
1.2 References .................................................... 1
1.3 Glossary ..................................................... 1
1.4 General Caution ................................................ 1
1.0 Outline of the drive ............................................... 3
Part 1. Functional Specification ....................................... 5
2.0 Fixed Disk Subsystem Description ....................................... 7
2.1 Control Electronics ............................................... 7
2.2 Head Disk Assembly .............................................. 7
2.3 Actuator ..................................................... 7
3.0 Drive Characteristics .............................................. 9
3.1 Formatted Capacity ............................................... 9
3.2 Data Sheet .................................................... 9
3.3 Cylinder Allocation .............................................. 10
3.4 Performance Characteristics ......................................... 10
3.4.1 Command overhead ........................................... 11
3.4.2 Mechanical Positioning ......................................... 11
3.4.3 Drive Ready Time ............................................ 13
3.4.4 Data Transfer Speed ........................................... 13
3.4.5 Buffering Operation (Lookahead/Write Cache) ........................... 14
3.4.6 Throughput ................................................ 15
3.4.7 Operating Mode Definition ....................................... 16
4.0 Data integrity ................................................. 17
4.1 Equipment Status ............................................... 17
4.2 Error Recovery ................................................ 17
5.0 Physical Format ................................................ 19
5.1 Shipped Format (PList) ........................................... 19
5.2 Reassigned Format (GList) ......................................... 19
6.0 Specification .................................................. 21
6.1 Electrical Interface Specification ...................................... 21
6.1.1 Connectors ................................................ 21
6.1.2 SCSI Cable ................................................ 24
6.1.3 SCSI Bus Terminator .......................................... 24
6.1.4 Hot Plug / Unplug ............................................ 24
6.1.5 SCSI Bus Electrical Characteristics .................................. 25
6.1.6 Auxiliary Connector on 68-pin Model ................................. 25
6.2 Option Jumper Block ............................................. 27
6.2.1 Jumper Signal Description ....................................... 29
6.2.2 Shipping Default ............................................. 32
6.3 LED Circuit .................................................. 33
6.3.1 50-Pin Model ............................................... 33
6.3.2 68-Pin Model ............................................... 34
Copyright IBM Corp. 1996 iii

6.3.3 80-Pin Model ............................................... 35
6.4 Environment .................................................. 36
6.5 DC Power Requirements ........................................... 37
6.5.1 Start Up Current ............................................. 38
6.6 Reliability ................................................... 39
6.6.1 Contact Start Stop (CSS) ........................................ 39
6.6.2 Data Reliability .............................................. 39
6.6.3 Seek/ID Mis-compare Errors ...................................... 39
6.6.4 Equipment Errors ............................................ 39
6.6.5 Failure Prediction ( PFA / S.M.A.R.T.) ............................... 39
6.6.6 Automatic Drive Maintenance (ADM) ................................ 40
6.6.7 Preventive Maintenance ......................................... 40
6.7 Mechanical Specifications .......................................... 41
6.7.1 Outline .................................................. 41
6.7.2 Mechanical Dimensions ......................................... 44
6.7.3 Interface Connector ........................................... 45
6.7.4 Mounting Positions and Tappings .................................. 48
6.7.5 Shipping Zone and Lock ........................................ 49
6.7.6 Breather Hole ............................................... 49
6.8 Vibration and Shock ............................................. 50
6.8.1 Operating Vibration ........................................... 50
6.8.2 Non-Operating Vibrations ....................................... 50
6.8.3 Operating Shock ............................................. 51
6.8.4 Non-Operating Shock .......................................... 51
6.9 Acoustics .................................................... 52
6.9.1 Sound Power Levels ........................................... 52
6.9.2 Sound Power Acceptance Criteria ................................... 52
6.9.3 Sound Pressure (Reference) ....................................... 53
6.10 Identification Labels ............................................. 54
6.11 Electromagnetic Compatibility ....................................... 54
6.12 Safety ..................................................... 55
6.12.1 Underwriters Lab (UL) Approval .................................. 55
6.12.2 Canadian Standards Authority (CSA) Approval .......................... 55
6.12.3 IEC Compliance ............................................ 55
6.12.4 German Safety Mark .......................................... 55
6.12.5 Flammability .............................................. 55
6.12.6 Secondary Circuit Protection ..................................... 55
6.13 Packaging ................................................... 55
Part 2. SCSI Interface Specification ................................... 57
7.0 SCSI COMMAND SET ........................................... 59
7.1 Flag and Link Bits .............................................. 60
7.2 Abbreviations ................................................. 61
7.3 Byte ordering conventions .......................................... 61
7.4 FORMAT UNIT (04) ............................................ 62
7.4.1 Defect List ................................................ 62
7.4.2 Defect Descriptor ............................................. 64
7.5 INQUIRY (12) ................................................ 66
7.6 Inquiry data .................................................. 67
7.6.1 INQUIRY Data Format (When Invalid LUN is Specified) .................... 68
7.6.2 Inquiry Data Format - EVPD = 0 .................................. 70
7.6.3 Inquiry Data Format - EVPD = 1 - Page Code = 00 ....................... 72
7.6.4 Inquiry Data Format - EVPD = 1 - Page Code = 01 ....................... 73
iv OEM Spec. of DCAS-34330/32160

7.6.5 Inquiry Data Format - EVPD = 1 - Page Code = 03 ....................... 74
7.6.6 Inquiry Data Format - EVPD = 1 - Page Code = 80h ...................... 75
7.6.7 Inquiry Data Format - EVPD = 1 - Page Code = 82h ...................... 76
7.7 LOG SELECT (4C) ............................................. 78
7.8 LOG SENSE (4D) .............................................. 79
7.8.1 Log Page parameters ........................................... 80
7.8.2 Log Sense Page 0 ............................................. 81
7.8.3 Log Sense Page 2 ............................................. 82
7.8.4 Log Sense Page 3 ............................................. 84
7.8.5 Log Sense Page 5 ............................................. 86
7.8.6 Log Sense Page 6 ............................................. 88
7.8.7 Log Sense Page 3A ........................................... 89
7.9 MODE SENSE (1A) ............................................. 90
7.9.2 Mode Parameter List .......................................... 91
7.10 MODE SENSE (5A) ............................................ 94
7.11 MODE SELECT (15) ............................................ 95
7.12 Mode select data ............................................... 97
7.12.1 Page 0 (Vendor Unique Parameters) ................................. 98
7.12.2 Page 1 (Read/Write Error Recovery Parameters) .......................... 101
7.12.3 Page 2 (Disconnect/Reconnect Parameters) ............................. 106
7.12.4 Page 3 (Format Device Parameters) ................................. 108
7.12.5 Page 4 (Rigid Disk Drive Geometry Parameters) .......................... 110
7.12.6 Page 7 (Verify Error Recovery Parameters) ............................. 111
7.12.7 Page 8 (Caching Parameters) ..................................... 113
7.12.8 Page A (Control Mode Page Parameters) .............................. 115
7.12.9 Page 0C (Notch Parameters) ..................................... 117
7.12.10 Page 1C (Informational Exceptions Control) ........................... 119
7.12.11 Page 38 (Power Control) ....................................... 121
7.13 MODE SELECT (55) ............................................ 122
7.14 PRE-FETCH (34) .............................................. 123
7.15 READ (08) .................................................. 124
7.16 READ CAPACITY (25) .......................................... 125
7.17 READ DEFECT DATA (37) ....................................... 127
7.17.1 Defect List Header ........................................... 128
7.17.2 Bytes from Index Format (100b) ................................... 128
7.17.3 Physical Sector Format (101b) .................................... 128
7.18 READ EXTENDED (28) ......................................... 130
7.19 READ BUFFER (3C) ........................................... 131
7.19.1 Combined Header And Data (Mode 000) ............................. 131
7.19.2 Read Data (Mode 010b) ........................................ 132
7.19.3 Descriptor (Mode 011b) ........................................ 132
7.20 READ LONG (3E) ............................................. 134
7.21 REASSIGN BLOCKS (07) ........................................ 135
7.22 RECEIVE DIAGNOSTICS (1C) ..................................... 137
7.22.1 Receive Diagnostic Page 0 ....................................... 137
7.22.2 Receive Diagnostic Page 40 ...................................... 137
7.23 RELEASE (17) ............................................... 139
7.24 REQUEST SENSE (03) .......................................... 140
7.25 RESERVE (16) ............................................... 141
7.26 REZERO UNIT (01) ............................................ 142
7.27 SEEK (0B) .................................................. 143
7.28 SEEK EXTENDED (2B) ......................................... 144
7.29 SEND DIAGNOSTIC (1D) ........................................ 145
7.29.1 Send Diagnostic Pages 0 ........................................ 146
7.29.2 Send Diagnostic Pages 40 ....................................... 146
Contents v

7.30 START/STOP UNIT (1B) ......................................... 148
7.31 SYNCHRONIZE CACHE (35) ...................................... 149
7.32 TEST UNIT READY (00) ......................................... 150
7.33 VERIFY (2F) ................................................ 151
7.34 WRITE (0A) ................................................. 152
7.35 WRITE EXTENDED (2A) ........................................ 153
7.36 WRITE AND VERIFY (2E) ....................................... 154
7.37 WRITE BUFFER (3B) ........................................... 155
7.37.1 Combined Header And Data (Mode 000b) ............................. 155
7.37.2 Write Data (Mode 010b) ........................................ 156
7.37.3 Download Microcode (Mode 100b) ................................. 156
7.37.4 Download Microcode and Save (Mode 101b) ........................... 157
7.38 WRITE LONG (3F) ............................................ 160
7.39 WRITE SAME (41) ............................................. 161
8.0 SCSI Status Byte ............................................... 163
9.0 SCSI MESSAGE SYSTEM ......................................... 165
9.1 Supported Messages .............................................. 165
9.1.1 COMMAND COMPLETE (00) .................................... 166
9.1.2 SYNCHRONOUS DATA TRANSFER REQUEST (01,03,01H) ................ 166
9.1.3 WIDE DATA TRANSFER REQUEST (01,02,03H) ....................... 168
9.1.4 SAVE DATA POINTER (02) ..................................... 170
9.1.5 RESTORE POINTERS (03) ...................................... 170
9.1.6 DISCONNECT (04) .......................................... 171
9.1.7 INITIATOR DETECTED ERROR (05) .............................. 171
9.1.8 ABORT (06) ............................................... 171
9.1.9 MESSAGE REJECT (07) ....................................... 171
9.1.10 NO OPERATION (08) ........................................ 172
9.1.11 MESSAGE PARITY ERROR (09) ................................. 172
9.1.12 LINKED COMMAND COMPLETE (0A) ............................ 172
9.1.13 LINKED COMMAND COMPLETE WITH FLAG (0B) .................... 172
9.1.14 BUS DEVICE RESET (0C) ..................................... 172
9.1.15 ABORT TAG (0D) .......................................... 172
9.1.16 CLEAR QUEUE TAG (0E) ..................................... 172
9.1.17 QUEUE TAG MESSAGES(20h, 21h, 22h) ............................ 173
9.1.18 IGNORE WIDE RESIDUE (23h) .................................. 173
9.1.19 IDENTIFY (80 - FF) ......................................... 174
9.2 Supported Message Functions ........................................ 174
9.3 Attention Condition .............................................. 176
9.4 SCSI Bus Related Error Handling Protocol ................................ 176
9.4.1 Unexpected BUS FREE Phase Error Condition ........................... 177
9.4.2 MESSAGE OUT Phase Parity Error ................................. 177
9.4.3 MESSAGE IN Phase Parity Error (Message Parity Error) ..................... 177
9.4.4 COMMAND Phase Parity Error ................................... 177
9.4.5 DATA OUT Phase Parity Error .................................... 178
9.4.6 INITIATOR DETECTED ERROR Message ............................ 178
9.4.7 MESSAGE REJECT Message ..................................... 178
10.0 SCAM ..................................................... 179
10.1 SCAM operation ............................................... 179
10.1.1 Level 1 .................................................. 179
10.1.2 Level 2 .................................................. 179
10.2 Identification string ............................................. 181
10.3 Function codes ................................................ 182
vi OEM Spec. of DCAS-34330/32160

10.4 Action codes ................................................. 183
11.0 Additional Information ........................................... 185
11.1 SCSI Protocol ................................................ 185
11.1.1 Priority of SCSI Status Byte Reporting ............................... 185
11.1.2 Invalid LUN in Identify Message ................................... 185
11.1.3 Incorrect Initiator Connection .................................... 186
11.1.4 Command Processing During Execution of Active I/O process .................. 186
11.1.5 Unit Attention Condition ....................................... 189
11.1.6 Command Processing During Start-up and Format Operations ................. 189
11.1.7 Internal Error Condition ........................................ 190
11.1.8 Deferred error .............................................. 190
11.1.9 Degraded Mode ............................................. 191
11.1.10 Degraded mode handling ....................................... 191
11.1.11 Command Processing While Reserved ............................... 192
11.2 Priority Commands ............................................. 193
11.3 Command queuing .............................................. 193
11.3.1 Queue depth ............................................... 193
11.3.2 Tagged queuing ............................................. 194
11.3.3 Untagged queuing ............................................ 194
11.3.4 Command queuing rule ........................................ 194
11.3.5 Queue Full status ............................................ 194
11.3.6 Device behaviour on Command queuing .............................. 194
11.4 Command reordering ............................................ 195
11.5 Concurrent I/O Process ........................................... 195
11.6 Back to Back Write ............................................. 195
11.7 Write Cache .................................................. 195
11.8 Power Saving Mode ............................................. 196
11.9 Automatic Rewrite/Reallocate ....................................... 196
11.10 Segmented Caching ............................................. 198
11.10.1 Overview ................................................ 198
11.10.2 Read Ahead .............................................. 198
11.11 Reselection ................................................. 198
11.12 Single Initiator Selection .......................................... 198
11.13 Non-arbitrating systems .......................................... 198
11.14 Selection without ATN .......................................... 199
11.15 Multiple Initiator Environment ...................................... 199
11.15.1 Initiator Sense Data .......................................... 199
11.15.2 Initiator Mode Select/Mode Sense Parameters ........................... 199
11.15.3 Initiator Data Transfer Mode Parameter .............................. 199
11.16 Contingent allegiance Condition ..................................... 200
11.17 Reset ..................................................... 201
11.17.1 Reset Sources ............................................. 201
11.17.2 Reset Actions ............................................. 201
11.18 Diagnostics ................................................. 202
11.18.1 Power on Diagnostics ......................................... 202
11.18.2 Diagnostics Command ........................................ 202
11.18.3 Diagnostics Fault Reporting ..................................... 202
11.19 Idle Time Functions ............................................ 203
12.0 SCSI SENSE DATA ............................................ 205
12.1 SCSI Sense Data Format .......................................... 205
12.2 Sense Data Description ........................................... 206
12.2.1 Valid (Bit 7 of byte 0) ......................................... 206
12.2.2 Error Code (Bit 6 - 0 of byte 0) .................................... 206
Contents vii

12.2.3 ILI : Incorrect Length Indicator (Bit 5 of byte 2) .......................... 206
12.2.4 Sense Key (Bit 3 - 0 of byte 2) .................................... 206
12.2.5 Information Bytes (Byte 3 thru 6) .................................. 207
12.2.6 Additional Sense Length (Byte 7) ................................... 207
12.2.7 Reserved (Byte 8-11) .......................................... 207
12.2.8 Additional Sense Code/Qualifier (Byte 12 and 13) ......................... 208
12.2.9 FRU : Field Replaceable Unit (Byte 14) .............................. 211
12.2.10 Sense Key Specific (Byte 15 thru 17) ................................ 211
12.2.11 Reserved (Byte 18 thru 19) ...................................... 212
12.2.12 Vender unique error information (Byte 20 thru 23) ........................ 213
12.2.13 Reserved (Byte 28 thru 31) ...................................... 213
Index ......................................................... 215
viii OEM Spec. of DCAS-34330/32160

Figures
1. Formatted Capacity .............................................. 9
2. Data Sheet ................................................... 9
3. Command Overhead ............................................ 11
4. Mechanical Positioning Performance ................................... 11
5. Full Stroke Seek Time ........................................... 12
6. Cylinder Skew ................................................ 12
7. Head Skew .................................................. 12
8. Latency Time ................................................. 12
9. Drive Ready Time .............................................. 13
10. Data Transfer Speed ............................................. 13
11. Simple Sequential Access Performance .................................. 15
12. Random Access Performance ....................................... 15
13. Mode Transition Time ........................................... 16
14. Power Connector Pin Assignments .................................... 21
15. Table of Signals ............................................... 21
16. Table of Signals ............................................... 22
17. Table of Signals ............................................... 23
18. Logic Signal Levels ............................................. 25
19. Jumper Pins ................................................. 27
20. Option Jumper Block Assignment ..................................... 28
21. SCSI Device ID ............................................... 29
22. Disable Auto Spin Up ,Auto Start Delay & Delay Start ........................ 31
23. LED Circuit ................................................. 31
24. Default Jumper Setting ........................................... 32
25. LED Circuit of 50-Pin Model ....................................... 33
26. LED Circuit of 68-Pin Model ....................................... 34
27. LED Circuit of 80-Pin (SCA-2) Model .................................. 35
28. Environmental Condition .......................................... 36
29. Input Voltage ................................................. 37
30. Power Supply Current of DCAS-34330 with SCSI Terminator Enabled ............... 37
31. Power Supply Current of DCAS-32160 with SCSI Terminator Enabled ............... 37
32. Power Supply Generated Ripple at Drive Power Connector ...................... 38
33. Typical Current Wave Form of 12V at Start Up of DCAS-32160 ................... 38
34. Outline of 50-pin Model .......................................... 41
35. Outline of 68-pin Model .......................................... 42
36. Outline of 80-pin Model .......................................... 43
37. Physical Dimension ............................................. 44
38. Mechanical Dimension ........................................... 44
39. Interface Connector (50-pin Model) .................................... 45
40. Interface Connector (68-pin Model) .................................... 46
41. Interface Connector (80-pin Model) .................................... 47
42. Mounting Positions and Tappings ..................................... 48
43. Breather Hole Location ........................................... 49
44. Random Vibration PSD Profile Breakpoints (Operating) ....................... 50
45. Random Vibration PSD Profile Breakpoints (Non-Operating) .................... 50
46. A-weighted Sound Power Levels ...................................... 52
47. Sound Pressure Level ............................................ 53
48. SCSI Commands Supported ........................................ 59
49. SCSI Commands Supported ........................................ 60
50. FORMAT UNIT (04) ........................................... 62
51. Format of Defect List Header ....................................... 63
Copyright IBM Corp. 1996 ix

52. Defect Descriptor - Block Format ..................................... 64
53. Defect Descriptor - Bytes From Index Format ............................. 65
54. Defect Descriptor - Physical Sector Format ............................... 65
55. INQUIRY (12) ............................................... 66
56. INQUIRY DATA Invalid LUN Specified ................................ 68
57. Product ID vs. Formatted Capacity .................................... 69
58. INQUIRY Data - EVPD = 0 ....................................... 70
59. INQUIRY DATA - EVPD = 1 (Page Code = 00) .......................... 72
60. INQUIRY DATA - EVPD = 1 (Page Code = 01) .......................... 73
61. INQUIRY DATA - EVPD = 1 (Page Code = 03) .......................... 74
62. INQUIRY DATA - EVPD = 1 (Page Code = 80h) ......................... 75
63. INQUIRY DATA - EVPD = 1 (Page Code = 82h) ......................... 76
64. LOG SELECT (4C) ............................................. 78
65. LOG SENSE (4D) ............................................. 79
66. MODE SENSE (1A) ............................................ 90
67. Page Code Usage .............................................. 91
68. Mode parameter header (6) ......................................... 91
69. Mode parameter header (10) ........................................ 92
70. MODE Parameter Block Descriptor ................................... 92
71. MODE Parameter Page Format ...................................... 93
72. MODE SENSE (5A) ............................................ 94
73. MODE SELECT (15) ............................................ 95
74. Page Code Usage .............................................. 97
75. Page 0 ..................................................... 98
76. Page 1 ..................................................... 101
77. Page 2 ..................................................... 106
78. Page 3 ..................................................... 108
79. Page 4 ..................................................... 110
80. Page 7 ..................................................... 111
81. Page 8 ..................................................... 113
82. Page A .................................................... 115
83. Page 0C .................................................... 117
84. Page 1C .................................................... 119
85. Page 38h ................................................... 121
86. MODE SELECT (55) ............................................ 122
87. Pre-Fetch (34) ................................................ 123
88. READ (08) .................................................. 124
89. READ CAPACITY (25) .......................................... 125
90. Format of READ CAPACITY command reply ............................. 126
91. Read Defect Data (37) ........................................... 127
92. Defect List Header .............................................. 128
93. Defect Descriptors of Bytes from Index Format ............................. 128
94. Defect Descriptors of Physical Sector Format .............................. 129
95. Read Extended (28) ............................................. 130
96. READ BUFFER (3C) ........................................... 131
97. READ BUFFER Header .......................................... 132
98. READ BUFFER DESCRIPTOR .................................... 133
99. READ LONG (3E) ............................................. 134
100. REASSIGN BLOCKS (07) ........................................ 135
101. Format of REASSIGN BLOCKS data .................................. 136
102. RECEIVE DIAGNOSTIC (1C) ...................................... 137
103. RELEASE (17) ............................................... 139
104. REQUEST SENSE (03) .......................................... 140
105. RESERVE (16) ............................................... 141
106. REZERO UNIT (01) ............................................ 142
xOEM Spec. of DCAS-34330/32160

107. SEEK (0B) .................................................. 143
108. SEEK EXTENDED (2B) ......................................... 144
109. SEND DIAGNOSTIC (1D) ........................................ 145
110. START/STOP Unit (1B) .......................................... 148
111. SYNCHRONIZE CACHE (35) ...................................... 149
112. TEST UNIT READY (00) ......................................... 150
113. VERIFY (2F) ................................................ 151
114. WRITE (0A) ................................................. 152
115. WRITE EXTENDED (2A) ........................................ 153
116. WRITE AND VERIFY (2E) ....................................... 154
117. WRITE BUFFER (3B) .......................................... 155
118. WRITE BUFFER Header ......................................... 156
119. WRITE LONG (3F) ............................................ 160
120. WRITE SAME (41) ............................................. 161
121. SCSI Status Byte ............................................... 163
122. Supported Messages ............................................. 165
123. Synchronous Data Transfer Request. ................................... 166
124. Initiator Request/Target Response (SCSI Fast) ............................. 167
125. Target Response to Initiator's Transfer Period .............................. 167
126. Initiator Request/Target Response (SCSI Ultra/Wide) ......................... 168
127. Wide Data Transfer Request. ........................................ 169
128. Initiator Request/Target Response .................................... 169
129. Target Request to Initiator ......................................... 170
130. Queue Tag Messages ............................................ 173
131. Ignore Wide Residue Message Format .................................. 174
132. SCAM Identification string ......................................... 181
133. SCAM Identification string ......................................... 182
134. Action codes ................................................. 183
135. Summary of Idle Time Functions ..................................... 203
136. Format of Sense Data ............................................ 205
137. Field Pointer Bytes ............................................. 211
138. Actual Retry Count Bytes ......................................... 212
139. Format Progress Indication Bytes ..................................... 212
Figures xi

xii OEM Spec. of DCAS-34330/32160

1.0 General
1.1 Introduction
This document describes functional and interface specifications of DCAS-34330 and DCAS-32160 3.5 inch
hard disk drives. Both models have 50-pin, 68-pin or 80-pin (SCA-2) connector, and support Level-2
SCAM.
Note: The specifications are subject to change without notice.
The interface conforms to the referred documents listed in the next section.
The vendor specific items and options supported by the drive are described in each section.
1.2 References
'draft' ANSI SCSI-2 standard, Revision 10L, Jan 1994 (Document X3.1311-1994)
'draft' ANSI SCSI-3 Fast-20, X3T10/1071D
'draft' ANSI SCSI-3 SCAM, X3T10/855D Annex A
1.3 Glossary
Word Meaning
Kbpi 1,000 Bits Per Inch
Mbps 1,000,000 Bits per second
MB 1,000,000 bytes
KB 1,000 bytes unless otherwise specified
32KB 32 x 1,024 bytes
64KB 64 x 1,024 bytes
Mb/sq.in 1,000,000 bits per square inch
MLC Machine Level Control
PFA Predictive Failure Analysis (Trademark of IBM Corp.)
S.M.A.R.T. Self-Monitoring Analysis and Reporting Technology
ADM Automatic Drive Maintenance
SCAM SCSI Configured AutoMatically
1.4 General Caution
The drive can be easily damaged by shocks or ESD (Electric Static Discharge), so any damages applied to
the drive after taking out from the shipping package or opening of the ESD protective bag are the user's
responsibility.
Copyright IBM Corp. 1996 1

2OEM Spec. of DCAS-34330/32160

1.0 Outline of the drive
Data capacity 4GB and 2GB
50-pin, 68-pin, 80-pin (SCA-2) single-ended models
SCSI-2 Standard
SCSI-3 FAST-20 WIDE ( up to 40 Mbytes/sec transfer )
SCSI-3 SCAM Level-2 support
Tagged Command Queuing support at choice of 7x64KB or 3x128KB data buffer
Multi-initiator support
512 Bytes/sector
Interleave factor 1:1
Write Cache
Segmented data buffer, 7x64KB, 3x128KB or 1x448KB at user choice
ECC on the fly
Autometic error recovery procedures for read and write commands
Self diagnostics on power on and resident diagnostics
Transparent defect management with ADR ( Automatic Defect Reallocation )
8.5 msec seek time in read operation
5400rpm spindle rotation.
Closed loop actuator servo
Dedicated head landing zone
Automatic actuator lock
Informational Exceptions Control Page of SCSI-3 support as PFA or S.M.A.R.T. function
Note: PFA which means Predictive Failure Analysis is Trademark of IBM Corporation.
Copyright IBM Corp. 1996 3

4OEM Spec. of DCAS-34330/32160

Part 1. Functional Specification
Copyright IBM Corp. 1996 5

6OEM Spec. of DCAS-34330/32160