IBM OEM Hard Disk

8/11/2019 IBM OEM Hard Disk

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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


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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


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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)

The following paragraph does not apply to the United Kingdom or any country where such provisions are

inconsistent with local law: INTERNATIONAL BUSINESS MACHINES CORPORATION PROVIDES THIS

PUBLICATION AS IS WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED,

INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY OR

FITNESS FOR A PARTICULAR PURPOSE. Some states do not allow disclaimer or express or implied warranties

in certain transactions, therefore, this statement may not apply to You.

This publication could include technical inaccuracies or typographical errors. Changes are periodically made to the

information herein; these changes will be incorporated in new editions of the publication. IBM may make improve-

ments and/or changes in the product(s) and/or the program(s) described in this publication at any time.

It is possible that this publication may contain reference to, or information about, IBM products (machines and

programs), programming, or services that are not announced in your country. Such references or information must

not be construed to mean that IBM intends to announce such IBM products, programming, or services in your

country.

Technical information about this product is available from your local IBM representative or at

http://www.ibm.com/harddrive

IBM may have patents or pending patent applications covering subject matter in this document. The furnishing

of this document does not give you any license to these patents. You can send license inquiries, in writing, to the

IBM Director of Commercial Relations, IBM Corporation, Armonk, NY 10577.

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.


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Contents

1.0 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.2 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1.3 Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.4 General Caution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1.0 Outline of the drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Part 1. Functional Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2.0 Fixed Disk Subsystem Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72.1 Control Electronics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72.2 Head Disk Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72.3 Actuator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.0 Drive Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93.1 Formatted Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93.2 Data Sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93.3 Cylinder Allocation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103.4 Performance Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3.4.1 Command overhead . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113.4.2 Mechanical Positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113.4.3 Drive Ready Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133.4.4 Data Transfer Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133.4.5 Buffering Operation (Lookahead/Write Cache) . . . . . . . . . . . . . . . . . . . . . . . . . . . 143.4.6 Throughput . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153.4.7 Operating Mode Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

4.0 Data integrity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174.1 Equipment Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174.2 Error Recovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

5.0 Physical Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195.1 Shipped Format (PList) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195.2 Reassigned For mat (GList) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

6.0 Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216.1 Electrical Interface Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

6.1.1 Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216.1.2 SCSI Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 246.1.3 SCSI Bus Terminator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 246.1.4 Hot Plug / Unplug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 246.1.5 SCSI Bus Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 256.1.6 Auxiliary Connector on 68-pin Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

6.2 Option Jumper Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 276.2.1 Jumper Signal Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 296.2.2 Shipping Default . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

6.3 LED Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 336.3.1 50-Pin Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 336.3.2 68-Pin Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Copyright IBM Corp. 1996 iii


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6.3.3 80-Pin Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 356.4 Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 366.5 DC Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

6.5.1 Start Up Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 386.6 Reliability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

6.6.1 Contact Start Stop (CSS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 396.6.2 Data Reliability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

6.6.3 Seek/ID Mis-compare Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 396.6.4 Equipment Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 396.6.5 Failure Prediction ( PF A / S.M.A.R.T.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 396.6.6 Automatic Drive Maintenance (ADM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 406.6.7 Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

6.7 Mechanical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 416.7.1 Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 416.7.2 Mechanical Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 446.7.3 Interface Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 456.7.4 Mounting Positions and Tappings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 486.7.5 Shipping Zone and Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 496.7.6 Breather Hole . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

6.8 Vibration and Shock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 506.8.1 Operating Vibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 506.8.2 Non-Operating Vibrations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 506.8.3 Operating Shock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 516.8.4 Non-Operating Shock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

6.9 Acoustics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 526.9.1 Sound Power Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 526.9.2 Sound Power Acceptance Criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 526.9.3 Sound Pressure (Reference) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

6.10 Identification Labels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 546.11 Electromagnetic Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 546.12 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

6.12.1 Underwriters Lab (U L) Approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 556.12.2 Canadian Standards Authority (CSA) Approval . . . . . . . . . . . . . . . . . . . . . . . . . . 556.12.3 IEC Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 556.12.4 German Safety Mark . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 556.12.5 Flammability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 556.12.6 Secondary Circuit Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

6.13 Packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Part 2. SCSI Interface Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

7.0 SCSI COMMAND SET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 597.1 Flag and Link Bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

7.2 Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 617.3 Byte ordering conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 617.4 FOR MAT UN IT (04) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

7.4.1 Defect List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 627.4.2 Defect Descriptor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

7.5 INQU IRY (12) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 667.6 Inquiry data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

7.6.1 INQ UIR Y Data Format (When Invalid LUN is Specified) . . . . . . . . . . . . . . . . . . . . 687.6.2 Inquiry Data Format - EVPD = 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 707.6.3 Inquiry Data Format - EVPD = 1 - Page Code = 00 . . . . . . . . . . . . . . . . . . . . . . . 727.6.4 Inquiry Data Format - EVPD = 1 - Page Code = 01 . . . . . . . . . . . . . . . . . . . . . . . 73

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7.6.5 Inquiry Data Format - EVPD = 1 - Page Code = 03 . . . . . . . . . . . . . . . . . . . . . . . 747.6.6 Inquiry Data Format - EVPD = 1 - Page Code = 80h . . . . . . . . . . . . . . . . . . . . . . 757.6.7 Inquiry Data Format - EVPD = 1 - Page Code = 82h . . . . . . . . . . . . . . . . . . . . . . 76

7.7 LOG SELECT (4C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 787.8 LOG SENSE (4D) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

7.8.1 Log Page parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 807.8.2 Log Sense Page 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

7.8.3 Log Sense Page 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 827.8.4 Log Sense Page 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 847.8.5 Log Sense Page 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 867.8.6 Log Sense Page 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 887.8.7 Log Sense Page 3A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

7.9 MOD E SENSE (1A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 907.9.2 Mode Parameter List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

7.10 MOD E SENSE (5A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 947.11 MOD E SELECT (15) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 957.12 Mode select data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

7.12.1 Page 0 (Vendor Unique Parameters) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 987.12.2 Page 1 (Read/Write Error Recovery Parameters) . . . . . . . . . . . . . . . . . . . . . . . . . . 101

7.12.3 Page 2 (Disconnect/Reconnect Parameters) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1067.12.4 Page 3 (Format Device Parameters) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1087.12.5 Page 4 (Rigid Disk Drive Geometry Parameters) . . . . . . . . . . . . . . . . . . . . . . . . . . 1107.12.6 Page 7 (Verify Error Recovery Parameters) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1117.12.7 Page 8 (Caching Parameters) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1137.12.8 Page A (Control Mode Page Parameters) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1157.12.9 Page 0C (Notch Parameters) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1177.12.10 Page 1C (Informational Exceptions Control) . . . . . . . . . . . . . . . . . . . . . . . . . . . 1197.12.11 Page 38 (Power Control) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121

7.13 MOD E SELECT (55) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1227.14 PRE-F ETCH (34) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1237.15 REA D (08) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1247.16 REA D CAPACITY (25) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1257.17 READ DEFE CT DATA (37) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127

7.17.1 Defect List Header . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1287.17.2 Bytes from Index Format (100b) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1287.17.3 Physical Sector Forma t (101b) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128

7.18 READ E XTEN DED (28) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1307.19 READ BU FFE R (3C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131

7.19.1 Combined Header And Data (Mode 000) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1317.19.2 Read Data (Mode 010b) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1327.19.3 Descriptor (Mode 011b) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132

7.20 READ L ONG (3E) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1347.21 REASSIGN BLOC KS (07) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1357.22 RECEIVE DIAGNO STICS (1C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137

7.22.1 Receive Diagnostic Page 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1377.22.2 Receive Diagnostic Page 40 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137

7.23 RELEASE (17) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1397.24 REQ UEST SENSE (03) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1407.25 RESERV E (16) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1417.26 REZE RO UN IT (01) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1427.27 SEEK (0B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1437.28 SEEK EXTEND ED (2B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1447.29 SEND DIAGNO STIC (1D) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145

7.29.1 Send Diagnostic Pages 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1467.29.2 Send Diagnostic Pages 40 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146

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7.30 START/STOP UN IT (1B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1487.31 SYNC HRONI ZE CACHE (35) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1497.32 TEST UNIT READY (00) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1507.33 VERIFY (2F) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1517.34 WRIT E (0A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1527.35 WRITE EXT ENDED (2A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1537.36 WRITE AND VERIFY (2E) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154

7.37 WRITE BU FFE R (3B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1557.37.1 Combined Header And Data (Mode 000b) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1557.37.2 Write Data (Mode 010b) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1567.37.3 Download Microcode (Mode 100b) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1567.37.4 Download Microcode and Save (Mode 101b) . . . . . . . . . . . . . . . . . . . . . . . . . . . 157

7.38 WRITE LO NG (3F) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1607.39 WRIT E SAME (41) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161

8.0 SCSI Status Byte . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163

9.0 SCSI MESSAGE SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1659.1 Supported Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165

9.1.1 COMM AND CO MPLETE (00) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1669.1.2 SYNC HRON OUS DATA TR ANS FER RE QUE ST (01,03,01H) . . . . . . . . . . . . . . . . 1669.1.3 WIDE DAT A TRA NSF ER RE QUE ST (01,02,03H) . . . . . . . . . . . . . . . . . . . . . . . 1689.1.4 SAVE DATA P OIN TER (02) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1709.1.5 RESTORE POINTERS (03) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1709.1.6 DISCO NNEC T (04) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1719.1.7 INITIATOR DET ECTED ER RO R (05) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1719.1.8 ABO RT (06) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1719.1.9 MESSAGE REJE CT (07) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1719.1.10 NO OP ERA TION (08) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1729.1.11 MESSAGE PARITY E RR OR (09) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1729.1.12 LINKE D COMM AND C OMPLETE (0A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1729.1.13 LINKE D COMMA ND COMP LETE WITH FLA G (0B) . . . . . . . . . . . . . . . . . . . . 1729.1.14 BUS DEVICE RES ET (0C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1729.1.15 ABO RT TAG (0D) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1729.1.16 CLEA R QUEU E TAG (0E) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1729.1.17 QU EU E TA G MESSAGES(20h, 21h, 22h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1739.1.18 IGN ORE WI DE RESIDU E (23h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1739.1.19 IDEN TIFY (80 - FF) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174

9.2 Supported Message Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1749.3 Attention Condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1769.4 SCSI Bus Related Error Handling Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176

9.4.1 Unexpected BUS F RE E Phase Error Condition . . . . . . . . . . . . . . . . . . . . . . . . . . . 1779.4.2 MESSAG E OU T Phase Parity Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1779.4.3 MES SAG E IN Phase Parity Error (Message Parity Error) . . . . . . . . . . . . . . . . . . . . . 177

9.4.4 CO MM AN D Phase Parity Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1779.4.5 DAT A OU T Phase Parity Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1789.4.6 INITIATOR DETECTE D ER RO R Message . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1789.4.7 MESSAG E REJE CT Message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178

10.0 SCAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17910.1 SCAM operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179

10.1.1 Level 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17910.1.2 Level 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179

10.2 Identification string . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18110.3 Function codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182

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10.4 Action codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183

11.0 Additional Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18511.1 SCSI Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185

11.1.1 Priority of SCSI Status Byte Reporting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18511.1.2 Invalid LU N in Identify Message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18511.1.3 Incorrect Initiator Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186

11.1.4 Com mand Processing During Execution of Active I/O process . . . . . . . . . . . . . . . . . . 18611.1.5 Unit Attention Condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18911.1.6 Com mand Processing During Start-up and Forma t Operations . . . . . . . . . . . . . . . . . 18911.1.7 Internal Error Condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19011.1.8 Deferred error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19011.1.9 Degraded Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19111.1.10 Degraded mode handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19111.1.11 Com mand Processing While Reserved . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192

11.2 Priority Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19311.3 Command queuing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193

11.3.1 Queue depth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19311.3.2 Tagged queuing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194

11.3.3 Untagged queuing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19411.3.4 Command queuing rule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19411.3.5 Queue Full status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19411.3.6 Device behaviour on Comma nd queuing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194

11.4 Com mand reordering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19511.5 Concurrent I/O Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19511.6 Back to Back Write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19511.7 Write Cache . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19511.8 Power Saving Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19611.9 Automatic Rewrite/Reallocate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19611.10 Segmented Caching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 198

11.10.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19811.10.2 Read Ahead . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 198

11.11 Reselection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19811.12 Single Initiator Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19811.13 Non-arbitrating systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19811.14 Selection without ATN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19911.15 Multiple Initiator Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199

11.15.1 Initiator Sense Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19911.15.2 Initiator Mode Select/Mode Sense Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . 19911.15.3 Initiator Data Transfer Mode Parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199

11.16 Contingent allegiance Condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20011.17 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201

11.17.1 Reset Sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20111.17.2 Reset Actions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201

11.18 Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20211.18.1 Power on Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20211.18.2 Diagnostics Comm and . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20211.18.3 Diagnostics Fault Repo rting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202

11.19 Idle Time Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203

12.0 SCSI SENSE DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20512.1 SCSI Sense Data Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20512.2 Sense Data Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206

12.2.1 Valid (Bit 7 of byte 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20612.2.2 Error Code (Bit 6 - 0 of byte 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206

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12.2.3 ILI : Incorrect Length Indicator (Bit 5 of byte 2) . . . . . . . . . . . . . . . . . . . . . . . . . . 20612.2.4 Sense Key (Bit 3 - 0 of byte 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20612.2.5 Information Bytes (Byte 3 thru 6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20712.2.6 Additional Sense Length (Byte 7) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20712.2.7 Reserved (Byte 8-11) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20712.2.8 Additional Sense Code/Qualifier (Byte 12 an d 13) . . . . . . . . . . . . . . . . . . . . . . . . . 20812.2.9 F R U : Field Replaceable Unit (Byte 14) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211

12.2.10 Sense Key Specific (Byte 15 thru 17) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21112.2.11 Reserved (Byte 18 thru 19) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21212.2.12 Vender unique error information (Byte 20 thru 23) . . . . . . . . . . . . . . . . . . . . . . . . 21312.2.13 Reserved (Byte 28 thru 31) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215

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Figures

1. Formatted Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92. Data Sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93. Command Overhead . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4. Mechanical Positioning Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115. Full Stroke Seek Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126. Cylinder Skew . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127. Head Skew . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128. Latency Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129. Drive Ready Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

10. Data Transfer Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1311. Simple Sequential Access Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1512. Rand om Access Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1513. Mode Transition Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1614. Power Connector Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2115. Table of Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2116. Table of Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2217. Table of Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2318. Logic Signal Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2519. Jumper Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2720. Option Jumper Block Assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2821. SCSI Device ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2922. Disable Auto Spin Up ,Auto Start Delay & Delay Start . . . . . . . . . . . . . . . . . . . . . . . . 3123. LED Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3124. Default Jumper Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3225. LED Circuit of 50-Pin Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3326. LED Circuit of 68-Pin Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3427. LE D Circuit of 80-Pin (SCA-2) Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3528. Environmental Condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

29. Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3730. Power Supply Current of DCAS-34330 with SCSI Terminator Enabled . . . . . . . . . . . . . . . 3731. Power Supply Current of DCAS-32160 with SCSI Terminator Enabled . . . . . . . . . . . . . . . 3732. Power Supply Generated Ripple at Drive Power Connector . . . . . . . . . . . . . . . . . . . . . . 3833. Typical Current Wave Form of 12V at Start Up of DCAS-32160 . . . . . . . . . . . . . . . . . . . 3834. Outline of 50-pin Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4135. Outline of 68-pin Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4236. Outline of 80-pin Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4337. Physical Dimension . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4438. Mechanical Dimension . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4439. Interface Connector (50-pin Model) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4540. Interface Connector (68-pin Model) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

41. Interface Connector (80-pin Model) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4742. Mounting Positions and Tappings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4843. Breather Hole Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4944. Rand om Vibration PSD Profile Breakpoints (Operating) . . . . . . . . . . . . . . . . . . . . . . . 5045. Rand om Vibration PSD Profile Breakpoints (Non-Operating) . . . . . . . . . . . . . . . . . . . . 5046. A-weighted Sound Power Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5247. Sound Pressure Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5348. SCSI Commands Supported . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5949. SCSI Commands Supported . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6050. F ORM AT UNI T (04) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6251. Format of Defect List Header . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Copyright IBM Corp. 1996 ix


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52. Defect Descriptor - Block Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6453. Defect Descriptor - Bytes From Index Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6554. Defect Descriptor - Physical Sector Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6555. INQUIRY (12) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6656. INQU IRY DATA Invalid LU N Specified . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6857. Product ID vs. Formatted Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6958. I NQUIRY Dat a - EVPD = 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

59. INQUIRY DATA - EVPD = 1 (Page Code = 00) . . . . . . . . . . . . . . . . . . . . . . . . . . 7260. INQUIRY DATA - EVPD = 1 (Page Code = 01) . . . . . . . . . . . . . . . . . . . . . . . . . . 7361. INQUIRY DATA - EVPD = 1 (Page Code = 03) . . . . . . . . . . . . . . . . . . . . . . . . . . 7462. INQUIRY DATA - EVPD = 1 (Page Code = 80h) . . . . . . . . . . . . . . . . . . . . . . . . . 7563. INQUIRY DATA - EVPD = 1 (Page Code = 82h) . . . . . . . . . . . . . . . . . . . . . . . . . 7664. LOG SELECT (4C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7865. LOG SENSE (4D) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7966. MODE SENSE (1A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9067. Page Code Usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9168. Mode parameter header (6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9169. Mode parameter header (10) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9270. MOD E Parameter Block Descriptor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

71. MOD E Parameter Page Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9372. MODE SENSE (5A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9473. MODE SELECT (15) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9574. Page Code Usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9775. Page 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9876. Page 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10177. Page 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10678. Page 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10879. Page 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11080. Page 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11181. Page 8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11382. Page A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11583. Page 0C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11784. Page 1C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11985. Page 38h . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12186. MODE SELECT (55) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12287. Pre-Fetch (34) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12388. READ (08) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12489. READ CAPACITY (25) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12590. Format of READ CAPACITY command reply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12691. Read Defect Data (37) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12792. Defect List Header . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12893. Defect Descriptors of Bytes from Index Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12894. Defect Descriptors of Physical Sector For mat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12995. Read Extended (28) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130

96. READ BUF F ER (3 C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13197. READ BUFFE R Header . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13298. READ BUF F ER DES CRIP TOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13399. READ LONG (3 E) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134100. REASSIGN BLOCKS (07) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135101. Format of REASSIGN BLOCKS data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136102. RECEIVE DIAGNOSTIC (1C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137103. RELEASE (17) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139104. REQU EST SENSE (03) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140105. RESERV E (16) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141106. REZE RO UNIT (01) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142

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107. SEEK (0B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143108. SEEK EXTENDED (2B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144109. SEND DIAGNOSTIC (1D) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145110. START/ STOP Unit (1B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148111. SYNCHRONIZE CACHE (35) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149112. TEST UNIT READ Y (00) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150113. VERIFY (2F) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151

114. WRIT E (0A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152115. WRITE EXTEN DED (2A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153116. WRITE AND VERIFY (2E) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154117. WRITE BUFF ER (3B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155118. WRITE BUF FER Header . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156119. WRITE LONG (3F) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160120. WRIT E SAME (41) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161121. SCSI Status Byte . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163122. Supported Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165123. Synchronous Data Transfer Request. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166124. Initiator Request/Target Response (SCSI Fast) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167125. Target Response to Initiator's Transfer Period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167

126. Initiator Request/Target Response (SCSI Ultra/Wide) . . . . . . . . . . . . . . . . . . . . . . . . . 168127. Wide Data Transfer Request. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169128. Initiator Request/Target Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169129. Target Request to Initiator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170130. Queue Tag Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173131. Ignore Wide Residue Message Forma t . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174132. SCA M Identification string . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181133. SCA M Identification string . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182134. Action codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183135. Summary of Idle Time Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203136. Format of Sense Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205137. Field Pointer Bytes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211138. Actual Retry Count Bytes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212139. Form at Progress Indication Bytes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212

Figures xi


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1.0 General

1.1 Introduction

This document describes functional and interface specifications of DCAS-34330 and DCAS-32160 3.5 inchhard disk drives. Both models have 50-pin, 68-pin or 80-pin (SCA-2) connector, and support Level-2SCAM.

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 secondMB 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

AD M Automatic Drive Maintenance

SCAM SCSI Configured AutoMatically

1.4 General CautionThe drive can be easily damaged by shocks or ESD (Electric Static Discharge), so any damages applied tothe drive after taking out from the shipping package or opening of the ESD protective bag are the user'sresponsibility.

Copyright IBM Corp. 1996 1


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1.0 Outline of the drive

Data capacity 4GB and 2GB

50-pin, 68-pin, 80-pin (SCA-2) single-ended models

SCSI-2 StandardSCSI-3 FAST-20 WID E ( 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 suppo rt

512 Bytes/sector

Interleave factor 1:1

Write Cache

Segmented data buffer, 7x64KB, 3x128KB or 1x448KB at user choiceECC on the fly

Autometic error recovery procedures for read a nd write comma nds

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 o r S.M.A.R.T. function

Note: PFAwhich means Predictive Failure Analysis is Trademark of IBM Corporation.



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Part 1. Functional Specification



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2.0 Fixed Disk Subsystem Description

2.1 Control Electronics

The drive is electronically controlled by a microprocessor, several logic modules, digital/analogue modules,and various drivers and receivers. The control electronics perform the following major functions:

Conducts a power-up sequence and calibrates the servo.Monitors various timers for head settling, servo failure, etc.Analyzes servo signals to provide closed loop control. These include position error signal and estimatedvelocity.Controls the voice coil motor driver to align the actuator onto a desired position.Monitors the actuator position and determines the target track for a seek operation.Constantly monitors error conditions of the servo and takes corresponding action if an error occurs.Controls starting, stopping, and rotating speed of the spindle.Controls and interprets all interface signals between the host controller and the drive.Controls read write accessing of the disk media, including defect management and error recovery.

Performs self-checkout (diagnostics).

2.2 Head Disk Assembly

The head disk assembly (HDA) is assembled in a clean room environment and contains a disk and actuatorassembly. Air is constantly circulated and filtered when the drive is operational. Venting of the HDA isaccomplished via a breather filter.

The spindle is driven directly by a brushless, sensorless DC drive motor. Dynamic braking is used to stop thespindle quickly.

2.3 Actuator

The read/write heads are mounted in the actuator. The actuator is a swing-arm assembly driven by a voicecoil motor. A closed-loop positioning servo controls the movement of the actuator. An embedded servopattern supplies feedback to the positioning servo to keep the read/write heads centered over the desiredtrack.

The actuator assembly is balanced to allow vertical or horizontal mounting without adjustment.

When the drive is powered off, the actuator automatically moves the head to a dedicated landing zone

outside of the data area, where the actuator is locked.



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3.0 Drive Characteristics

This chapter provides the characteristics of the drive.

3.1 Formatted Capacity

Figure 1. Formatted Capacity

3.2 Data Sheet

Description DCAS-34330 DCAS-32160

Label Capacity (MB) 4330 2160

Bytes per Sector 512 512

Sectors per Track 132-211 132-211

Number of heads 6 3

Number of disks 3 2

Number of LBAs 8,467,200 4,226,725

Total Logical Data Bytes 4,335,206,400 2,164,083,200

Figure 2. Data Sheet

Buffer to/from media [Mbit/sec] 62.5 to 103.4

Host to/from buffer ( interface transfer rate )

[Mbyte/sec]

20 (50-pin)

40 (68-pin, 80-pin)

Data buffer size 448Kbyte

Number of buffer segments 7 x 64Kbyte3 x 128Kbyte

1 x 448Kbyte (without tagged queuing)

Rotational speed [ R P M ] 5400

Recording density [ Kbpi] 114.4(Ave) / 134.6(Max)

Track density [ TPI] 8600

Areal density [ Mb/sq.in.] 981(Ave) / 1158(Max)

Data zone 8



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3.3 Cylinder Allocation

Mode page 03 (Format Device Parameters) and 0C (Zone Parameters) provide methods to determin mediumformat and zone parameters. See 7.12.4, Page 3 (For mat Device Parameters) on page 108, and 7.12.9,Page 0C (Notch Parameters) on page 117.

3.4 Performance Characteristics

A drive performance is characterized by the following parameters:

Command Overhead

Mechanical Positioning Seek Time LatencyData Transfer SpeedBuffering Operation (Lookahead/Write cache)

Note: All the above parameters contribute to drive performance. There are other parameters that contributeto th e performance of the actual system. This specification tries to define the bare drive characteristics, notthe system throughput which will depend on the system and the application.

Phys. Cyl. Sectors/Trk

System Area

Data Zone 0 0-857 211

Data Zone 1 858-2684 198

Data Zone 2 2685-3362 184

Data Zone 3 3363-4287 176

Data Zone 4 4288-5379 165

Data Zone 5 5380-6242 154

Data Zone 6 6243-6920 145

Data Zone 7 6921-8209 132

System Area

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3.4.1 Command overhead

Comm and overhead is defined as the time required:

from last byte of command phaseto the first byte of data phaseexcluding

Physical seek time Latency time Initiator delay with reconnections

Figure 3. Command Overhead

3.4.2 Mechanical Positioning

3.4.2.1 Average Seek Time (Including Settling)

Typical and Max are given througho ut the performance specification by;

Typical Average of the drive population tested at nominal environmental and voltage conditions.

Ma x Maximu m value measured on any one drive over the full range of the environmental andvoltage conditions. (See 6.4, Environment on page 36 and 6.5, DC PowerRequirements on page 37 for ranges.)

The seek time is measured from the start of actuator's motion to the start ofa reliable read or write opera-tion. Reliable read or write implies that error correction/recovery is not used to correct arrival problems.The average seek time is measured as the weighted average of all possible seek combinations.

Weighted Average =

max

n= 1

( max + 1 n) (Tn .in+ Tn.out)

( max + 1) ( max)

Where:max = Maximum seek lengthn = Seek length (1 to max)Tn.in = Inward measured seek time for an n track seekTn.out = Outward measured seek time for an n track seek

Command Case (Drive is in quiescence state) Time

Cache Not Hit


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3.4.2.2 Full Stroke Seek

Full stroke seek is measured as the average of 1000 full stroke seeks with a random head switchfrom bothdirections (inward and outward).

3.4.2.3 Cylinder Switch Time (Cylinder Skew)

A cylinder switch time is defined as the amount of time required by the fixed disk access the next sequentialblock after reading the last sector in the current cylinder.

The measured method is given in 3.4.6, Throughput on page 15.

3.4.2.4 Head Switch Time (Head Skew)

3.4.2.5 Average Latency

Figure 5. Full Stroke Seek Time

Function Typical Max.

Read [ msec] 15 18

Write [ msec] 15.5 19

Figure 6. Cylinder Skew

Typical

Cylinder Skew 3.2 [ msec]

Figure 7. Head Skew

Typical

Head Skew 1.9 [ msec]

Figure 8. Latency Time

Rotation Time for a revolution Average Latency

5400 [ R P M ] 11.1 [ msec] 5.56 [ msec]

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3.4.3 Drive Ready Time

Ready The condition in which the drive is able to perform a media access command (eg. read, write)immediately.

Power On This includes the time required for the internal self diagnostics.

3.4.4 Data Transfer Speed

Instantaneous disk-buffer transfer rate (Mbyte/sec) is derived by:(Number of sectors on a track)*512*(revolution/sec)

Note: Num ber of sectors per track will vary because of the linear density recording.

Sustained disk-buffer transfer rate (Mbyte/sec) is defined by considering head/cylinder change time. Thisgives a local average data transfer rate. It is derived by:

(Sustained Transfer Rate) = A/ ( B + C + D )

A = (Numb er of data sectors per cylinder) * 512B = ((# of Surface per cylinder) - 1) * (Head switch time)C = (Cylinder change time)D = (# of Surface) * (One revolution time)

Instantaneous Buffer-Host Transfer Rate (Mbyte/sec) defines the maximum data transfer rate on SCSIBus. It also depends on the speed of the host.

The measurement method is given in 3.4.6, Throughput on page 15.

Figure 9. Drive Ready Time

Condition Typical Max.

Power On to Ready (DCAS-34330) 15 [sec] 20 [ sec]

Power On to Ready (DCAS-32160) 12 [sec] 18 [ sec]

Figure 10. Data Transfer Speed

Description Typical

Disk-Buffer Transfer (Zone 0)

(Instantaneous) 9.72 [ Mbyte/sec]

(Sustained) DCAS-34330 8.1 [ Mbyte/sec]DCAS-32160 8.0 [Mbyte/sec]

Disk-Buffer Transfer (Zone 7)

(Instantaneous) 6.08 [ Mbyte/sec]

(Sustained) DCAS-34330 5.1 [ Mbyte/sec]DCAS-32160 5.0 [Mbyte/sec]

Buffer-Host

50-pin FAST-2068-pin / 80-pin FAST-20 Wide

20 [Mbyte/sec]40 [Mbyte/sec]

Drive Characteristics 13


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3.4.5 Buffering Operation (Lookahead/Write Cache)

At shipment, the total 448K bytes of the buffer is divided into 7 segmented blocks.

The segment size can be changed by Mode Page 8. See 7.12.7, Page 8 (Caching Parameters) on page 113for details.

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3.4.6 Throughput

3.4.6.1 Simple Sequential Access

The above table gives the time required to read/write for a total of 8000x consecutive blocks (16,777,216bytes) accessed by 128 read/write commands. Typical and Max values are given by 1 05% and 11 0% of Trespectively throughput following performance description.

Note: Assumes a host system responds instantaneously.T = (A * 128) + B + C + 16,777,216/D + 5 12 /E ( READ)T = (A * 128) + B + C + 1 6,777,216/D (WRITE)

where:T = Calculated Time (sec)A = Command Process Time (Pre/Post Command overhead)B = Average Seek TimeC = Average LatencyD = Sustained Disk-Buffer Transfer Rate (Mbyte/sec)E = Buffer-Host Transfer Rate (Mbyte/sec)

3.4.6.2 Random Access

The above table gives the time required t o execute a total of 1000x read/write comman ds which access arandom LBA.

T = (A + B + C + 512/D + 512/E) * 4096 (READ)T = (A + B + C + 512/D) * 4096 (WRITE)

where:T = Calculated Time (sec)A = Command Process Time (Pre/Post Command overhead)B = Average Seek TimeC = Average Latency

D = Sustained Disk-Buffer Transfer Rate (Mbyte/sec)E = Buffer-Host Transfer Rate (Mbyte/sec)

Figure 11. Simple Sequential Access Performance

Operation Typical Max

Sequential Read/Write Zone 0 2.26 [ sec]Zone 7 3.56 [sec]

Zone 0 2.37 [sec]Zone 7 3.73 [sec]

Figure 12. Random Access Performance

Operation Typical Max

Random Read 64 [ sec] 67 [sec]

Random Write 64 [ sec] 67 [sec]

Drive Characteristics 15


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3.4.7 Operating Mode Definition

Operating Mode Description

Spin-Up Start up time period from spindle stop or power down.Seek Seek operation modeWrite Write operation modeRead Read operation mode

Idle Spindle motor and servo system are working normally. Comman ds can be receivedand processed immediately.

Standby Spindle motor is stopped. Comma nds can be received immediately, but write or readoperations cannot begin until the spindle is spun-up and the Servo system is ready.

Note: Upo n Power dow n or Spindle stopped, a head locking mechanism will secure the heads in the IDparking position.Recovering from Standby mode does not need soft reset nor hard reset.

3.4.7.1 Mode Transition Time

Note: The actual spin down time will exist, however the co mmand will be processed immediately.

Figure 13. Mode Transition Time

From To Typical Max

Standby Idle 15 [ sec] (DCAS-34330)12 [ sec] (DCAS-32160)

20 [ sec] (DCAS-34330)18 [ sec] (DCAS-32160)

Idle Standby Immediate (note) Immediate (note)

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4.0 Data integrity

The drive retains recorded information under all non-write operations.No more than one sector can be lost by power down during write operation while write cache is disabled.If power down occurs before completion of data transfer from write cache to disk while write cache is

enabled, the data remaining in write cache will be lost. To prevent this data loss at power off, the followingaction is recommended:

To confirm successful completion of SY NCH RON IZE CAC HE (35h) command.

4.1 Equipment Status

Equipme nt status is available to the host system any time the drive is not ready to read, write, or seek. Thisstatus normally exists at power-on time and will be maintained until the following conditions are satisfied.

Access recalibration/tuning is complete.Spindle speed meets requirements for reliable operations.

Self-check of drive is complete.

Appropriate error status is made available to the host system if any of the following condition occurs afterthe drive has become ready:

Spindle speed goes outside of requirements for reliable operation.Write fault is detected.

4.2 Error Recovery

Errors occurring with the drive are handled by the error recovery procedure.

Errors that are uncorrectable after application of the error recovery procedures are reported to the ho stsystem as non-recoverable errors.



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5.0 Physical Format

Media defects are remapped to the next available sector during Form at Process in manufacturing. Themapping from LBA to the physical locations is calculated by an internal maintained table.

5.1 Shipped Format (PList)

Data areas are optimally used.

No extra sector is wasted as a spare throughout user data areas.

All pushes generated by defects are absorbed by spare tracks of inner zone.No spare sector at each track or zone. Spare sectors are reserved after max LBA of data area.

P L i s t P h y s i c a l F o r m a t

N N + 1 N + 2 N + 3

D e f e c t

D e f e c t

A

A

S k i p S k i p

Defects are skipped without any constraint, such as track or cylinder boundary. The calculation from LBA to physicalis done automatically by internal table.

5.2 Reassigned Format (GList)

252 spare sectors are available at shipment following after Max LBA of data area, and are used by Auto-matic Defect Reallocation and Reassign Block Command.

G L i s t P h y s i c a l F o r m a t

N

N + 1

N + 3

N + 4

N + 6

N + 7

N + 8

D e f e c t D e f e c t

R e a s s i g n

R e a s s i g n

V V

M a x M ax . M a x M a x M a x N + 2 N + 5 L B A 4 L B A 3 L B A 2 L B A 1 L B A S p a r e S p a r e

Calculation from LBA to physical is done automatically by internal table.



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6.0 Specification

6.1 Electrical Interface Specification

6.1.1 Connectors

6.1.1.1 Power Connector

Power pin assignment of 80-pin (SCA-2) model is shown in 6.1.1.4, SCSI Signal Connector (80-pin) onpage 23.Power pin assignment of 50-pin and 68-pin models is as shown below.

Figure 14. Power Connector Pin Assignments

6.1.1.2 SCSI Signal Connector (50-pin)

The SCSI signal connector complies with ANSI SCSI-2.

Pi n1234

Voltage+ 12 VG N DG N D+ 5 V

Figure 15. Table of Signals

PIN SIGNAL PIN SIGNAL

0103

050709111315171921232527

2931333537394143454749

GroundGround

GroundGroundGroundGroundGroundGroundGroundGroundGroundGroundOpenGround

GroundGroundGroundGroundGroundGroundGroundGroundGroundGroundGround

0204

060810121416182022242628

3032343638404244464850

-DB(0)-DB(1)

-DB(2)-DB(3)-DB(4)-DB(5)-DB(6)-DB(7)-DB(P)GroundGroundGroundTRM PowerGround

Ground-ATNGround-BSY-ACK-RST-MSG-SEL-C/D-REQ-I/O



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The pin assignments of interface signals conforms to ANSI SCSI-3 X3T10/855D as follows.


Connector

ContactNumber

Signal Name Connector

ContactNumber

Signal Name

01020304050607080910

111213141516171819202122

232425262728293031323334

GroundGroundGroundGroundGroundGroundGroundGroundGroundGround

GroundGroundGroundGroundGroundGroundTERM P W RTERM P W R(Reserved)GroundGroundGround

GroundGroundGroundGroundGroundGroundGroundGroundGroundGroundGroundGround

35363738394041424344

454647484950515253545556

575859606162636465666768

-DB(12)-DB(13)-DB(14)-DB(15)-DB(P1)-DB(0)-DB(1)-DB(2)-DB(3)-DB(4)

-DB(5)-DB(6)-DB(7)-DB(P0)GroundGroundTERM P W RTERM P W R(Reserved)Ground-ATNGround

-BSY-ACK-RST-MSG-SEL-C/D-REQ-I/O-DB(8)-DB(9)-DB(10)-DB(11)

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The pin assignments of interface signals conform to SFF-8046 as follows.


Connector

ContactNumber

Signal Name Connector

ContactNumber

Signal Name

01020304050607080910

111213141516171819202122

232425262728293031323334353637383940

12 Volt Charge12 Volt12 Volt12 Volt(Reserved)(Reserved)-DB(11)-DB(10)-DB(9)-DB(8)

-I/O-REQ-C/D-SEL-MSG-RST-ACK-BSY-ATN-DB(P0)-DB(7)-DB(6)

-DB(5)-DB(4)-DB(3)-DB(2)-DB(1)-DB(0)-DB(P1)-DB(15)-DB(14)-DB(13)-DB(12)5 Volt5 Volt5 Volt Charge(Reserved)AUTO SPIN UPSCSI ID (0)SCSI ID (2)

41424344454647484950

515253545556575859606162

636465666768697071727374757677787980

12V Groun d12V Groun d12V Groun dMATED 1(Reserved)GroundGroundGroundGroundGround

GroundGroundGroundGroundGroundGroundGroundGroundGroundGroundGroundGround

GroundGroundGroundGroundGroundGroundGroundGroundGroundGroundGroundMATED 25V Ground5V GroundACTIVE LED OUTDELAYED STARTSCSI ID (1)SCSI ID (3)

Specification 23


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6.1.2 SCSI Cable

The drives comply with ANSI X3T10/1071D.

The maximum cumulative signal path length between terminators shall be 3.0 meters when using up to 4maximum capacitance (25pF) devices.

The maximum cumulative signal path length between terminators shall be 1.5 meters when using from 5 to 8maximum capacitance devices.

Implementation that limits the transfer rate to a maximum of 5 mega transfers per second may extend thecumulative cable length to 6m as described in ANSI X3T10/855D.

6.1.3 SCSI Bus Terminator

The drives comply with ANSI X3T10/1071D.

Active terminator as specified in ANS I X

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