SCSI-2 Documentation
NOTE: Copies of this document may be purchased from: X3T9.2/86-109
Global Engineering Documents, 2805 McGaw, Irvine, CA 92714 Revision 10c
(800) 854-7179 or (714) 261-1455. Please refer to X3T9/89-042
document X3.131-198X.
draft proposed
American National Standard
for information systems -
SMALL COMPUTER SYSTEM INTERFACE - 2
(SCSI-2)
March 9, 1990
Secretariat
Computer and Business Equipment Manufacturers Association
Abstract: This standard defines mechanical, electrical, and functional
requirements for attaching physically small computers with each other and with
intelligent peripherals such as rigid disks, flexible disks, magnetic tape
devices, printers, optical disks, and scanners. The resulting interface
facilitates the interconnection of physically small computers and intelligent
peripherals and thus provides a common interface specification for both
systems integrators and suppliers of intelligent peripherals.
This is a draft proposed American National Standard of Accredited Standards
Committee X3. As such, this is not a completed standard. The X3T9 Technical
Committee may modify this document as a result of comments received during X3
approval as a standard.
COPYRIGHT NOTICE: This draft proposed standard is based upon ANSI X3.131-
1986, a document which is copyrighted by the American National Standards
Institute (ANSI). In accordance with the usual ANSI policy on the revision of
standards, this draft standard may be reproduced, for the purpose of review
and comment only, without further permission, provided this notice is
included. All other rights are reserved.
POINTS OF CONTACT:
John B. Lohmeyer (X3T9.2 Chair) I. Dal Allan (X3T9.2 Vice-Chair)
NCR Corporation ENDL
3718 N. Rock Road 14426 Black Walnut Court
Wichita, KS 67226 Saratoga, CA 95070
(316) 636-8703 (408) 867-6630
This revision incorporates editorial changes and several improvements (non-
substantive) which were the result of comments received during the public
review period. These changes approved by X3T9.2 at their February, 1990
plenary meeting in Austin, TX.
An electronic copy of this document is available on the SCSI Bulletin Board
System (316-636-8700).
The current editorial assignments are:
Lawrence J. Lamers (Technical Editor)
Maxtor Corporation
211 River Oaks Parkway
San Jose, CA 95134
(408) 432-4341
Elizabeth A. Stephens (Technical Editor)
Optimem
297 North Bernardo Avenue
Mountain View, CA 94043
(415) 961-1800
TABLE OF CONTENTS
1. Scope.................................................................1-1
2. Referenced Standards and Organizations................................2-1
3. Glossary and Conventions..............................................3-1
3.1. Glossary.........................................................3-1
3.2. Editorial Conventions............................................3-5
4. Physical Characteristics..............................................4-1
4.1. Physical Description.............................................4-1
4.2. Cable Requirements .............................................4-1
4.2.1. Single-Ended Cable........................................4-2
4.2.2. Differential Cable........................................4-2
4.2.3. Cable Requirements for Fast Synchronous Data Transfer.....4-2
4.3. Connector Requirements...........................................4-3
4.3.1. Nonshielded Connector Requirements........................4-3
4.3.1.1. Nonshielded Connector Alternative 1 - A Cable....4-3
4.3.1.2. Nonshielded Connector Alternative 2 - A Cable....4-3
4.3.1.3. Nonshielded Connector - B Cable..................4-4
4.3.2. Shielded Connector Requirements...........................4-4
4.3.2.1. Shielded Connector Alternative 1 - A Cable.......4-4
4.3.2.2. Shielded Connector Alternative 2 - A Cable.......4-5
4.3.2.3. Shielded Connector - B Cable.....................4-5
4.3.3. Connector Contact Assignments............................4-14
4.4. Electrical Description..........................................4-19
4.4.1. Single-Ended Alternative.................................4-19
4.4.1.1. Output Characteristics..........................4-19
4.4.1.2. Input Characteristics...........................4-19
4.4.2. Differential Alternative.................................4-20
4.4.2.1. Output Characteristics..........................4-20
4.4.2.2. Input Characteristics...........................4-20
4.4.3. Terminator Power.........................................4-21
4.4.4. RESERVED Lines...........................................4-23
4.5. SCSI Bus........................................................4-24
4.6. SCSI Bus Signals................................................4-26
4.6.1. Signal Values............................................4-27
4.6.2. OR-Tied Signals..........................................4-27
4.6.3. Signal Sources...........................................4-28
4.7. SCSI Bus Timing.................................................4-29
4.7.1. Arbitration Delay .......................................4-29
4.7.2. Assertion Period ........................................4-29
4.7.3. Bus Clear Delay .........................................4-30
4.7.4. Bus Free Delay ..........................................4-30
4.7.5. Bus Set Delay ...........................................4-30
4.7.6. Bus Settle Delay ........................................4-30
4.7.7. Cable Skew Delay ........................................4-30
4.7.8. Data Release Delay ......................................4-30
4.7.9. Deskew Delay ............................................4-30
4.7.10. Disconnection Delay ....................................4-30
4.7.11. Hold Time ..............................................4-31
4.7.12. Negation Period ........................................4-31
4.7.13. Power-On to Selection Time .............................4-31
4.7.14. Reset to Selection Time ................................4-31
4.7.15. Reset Hold Time ........................................4-31
4.7.16. Selection Abort Time ...................................4-31
4.7.17. Selection Time-out Delay ...............................4-31
4.7.18. Transfer Period ........................................4-31
4.8. Fast Synchronous Transfer Option................................4-32
4.8.1. Fast Assertion Period ...................................4-32
4.8.2. Fast Cable Skew Delay ...................................4-32
4.8.3. Fast Deskew Delay .......................................4-32
4.8.4. Fast Hold Time ..........................................4-32
4.8.5. Fast Negation Period ....................................4-32
5. Logical Characteristics...............................................5-1
5.1. SCSI Bus Phases..................................................5-1
5.1.1. BUS FREE Phase............................................5-1
5.1.2. ARBITRATION Phase.........................................5-2
5.1.3. SELECTION Phase...........................................5-3
5.1.3.1. SELECTION Time-out Procedure.....................5-3
5.1.4. RESELECTION Phase.........................................5-4
5.1.4.1. RESELECTION ...................................5-4
5.1.4.2. RESELECTION Time-out Procedure...................5-5
5.1.5. Information Transfer Phases...............................5-5
5.1.5.1. Asynchronous Information Transfer................5-6
5.1.5.2. Synchronous Data Transfer........................5-7
5.1.5.3. Wide Data Transfer...............................5-8
5.1.6. COMMAND Phase............................................5-10
5.1.7. Data Phase...............................................5-10
5.1.7.1. DATA IN Phase...................................5-10
5.1.7.2. DATA OUT Phase..................................5-10
5.1.8. STATUS Phase.............................................5-10
5.1.9. Message Phase............................................5-11
5.1.9.1. MESSAGE IN Phase................................5-11
5.1.9.2. MESSAGE OUT Phase...............................5-11
5.1.10. Signal Restrictions Between Phases......................5-12
5.2. SCSI Bus Conditions.............................................5-12
5.2.1. Attention Condition......................................5-12
5.2.2. Reset Condition..........................................5-13
5.2.2.1. Hard Reset Alternative..........................5-14
5.2.2.2. Soft Reset Alternative..........................5-14
5.3. SCSI Bus Phase Sequences........................................5-15
5.4. SCSI Pointers...................................................5-16
5.5. Message System Description......................................5-17
5.6. Messages........................................................5-20
5.6.1. ABORT....................................................5-20
5.6.2. ABORT TAG................................................5-21
5.6.3. BUS DEVICE RESET.........................................5-21
5.6.4. CLEAR QUEUE..............................................5-21
5.6.5. COMMAND COMPLETE.........................................5-22
5.6.6. DISCONNECT...............................................5-22
5.6.7. IDENTIFY.................................................5-22
5.6.8. IGNORE WIDE RESIDUE......................................5-24
5.6.9. INITIATE RECOVERY........................................5-24
5.6.10. INITIATOR DETECTED ERROR................................5-25
5.6.11. LINKED COMMAND COMPLETE.................................5-25
5.6.12. LINKED COMMAND COMPLETE (WITH FLAG).....................5-25
5.6.13. MESSAGE PARITY ERROR....................................5-25
5.6.14. MESSAGE REJECT..........................................5-26
5.6.15. MODIFY DATA POINTER Message.............................5-26
5.6.16. NO OPERATION............................................5-26
5.6.17. Queue Tag Messages......................................5-27
5.6.17.1. HEAD OF QUEUE TAG.............................5-28
5.6.17.2. ORDERED QUEUE TAG.............................5-28
5.6.17.3. SIMPLE QUEUE TAG..............................5-28
5.6.18. RELEASE RECOVERY........................................5-28
5.6.19. RESTORE POINTERS........................................5-28
5.6.20. SAVE DATA POINTER.......................................5-28
5.6.21. SYNCHRONOUS DATA TRANSFER REQUEST Message...............5-29
5.6.22. TERMINATE I/O PROCESS...................................5-31
5.6.23. WIDE DATA TRANSFER REQUEST Message......................5-33
6. SCSI Commands and Status..............................................6-1
6.1. Command Implementation Requirements..............................6-1
6.1.1. Reserved..................................................6-1
6.1.2. Operation Code Types......................................6-1
6.2. Command Descriptor Block.........................................6-2
6.2.1. Operation Code............................................6-4
6.2.2. Logical Unit Number.......................................6-5
6.2.3. Logical Block Address.....................................6-5
6.2.4. Transfer Length...........................................6-5
6.2.5. Parameter List Length.....................................6-6
6.2.6. Allocation Length.........................................6-6
6.2.7. Control Field.............................................6-7
6.3. Status ..........................................................6-8
6.4. Command Examples.................................................6-9
6.4.1. Single Command Example....................................6-9
6.4.2. Disconnect Example.......................................6-10
6.4.3. Linked Command Example...................................6-11
6.5. Command Processing Considerations and Exception Conditions .....6-11
6.5.1. Programmable Operating Definition........................6-11
6.5.2. Incorrect Initiator Connection...........................6-12
6.5.3. Selection of an Invalid Logical Unit.....................6-13
6.5.4. Parameter Rounding.......................................6-13
6.5.5. Asynchronous Event Notification .........................6-14
6.5.6. Unexpected Reselection...................................6-16
6.6. Contingent Allegiance Condition.................................6-16
6.7. Extended Contingent Allegiance Condition........................6-16
6.8. Queued I/O Processes............................................6-17
6.8.1. Untagged Queuing.........................................6-17
6.8.2. Tagged Queuing...........................................6-18
6.8.3. Example of Queued I/O Process............................6-20
6.8.3.1. Typical Sequences for Tagged Queuing............6-20
6.8.3.2. Example of Tagged Queuing ......................6-20
6.9. Unit Attention Condition........................................6-22
7. All Device Types......................................................7-1
7.1. Model for All Device Types.......................................7-1
7.1.1. SCSI Addresses............................................7-1
7.1.1.1. SCSI Device Address..............................7-1
7.1.1.2. Logical Units....................................7-1
7.1.1.3. Target Routines..................................7-1
7.1.2. Commands Implemented by all SCSI Devices..................7-2
7.1.2.1. Using the INQUIRY Command........................7-2
7.1.2.2. Using the REQUEST SENSE Command..................7-2
7.1.2.3. Using the SEND DIAGNOSTIC Command................7-2
7.1.2.4. Using the TEST UNIT READY Command................7-2
7.2. Commands for All Device Types....................................7-3
7.2.1. CHANGE DEFINITION Command.................................7-4
7.2.2. COMPARE Command...........................................7-7
7.2.3. COPY Command..............................................7-8
7.2.3.1. Errors Detected by the Managing SCSI Device.....7-10
7.2.3.2. Errors Detected by a Target.....................7-10
7.2.3.3. COPY Function Code 00h and 01h..................7-11
7.2.3.4. COPY Function Code 02h..........................7-12
7.2.3.5. COPY Function Code 03h..........................7-13
7.2.3.6. COPY Function Code 04h..........................7-15
7.2.3.7. Copies With Unequal Block Lengths...............7-16
7.2.4. COPY AND VERIFY Command..................................7-17
7.2.5. INQUIRY Command..........................................7-18
7.2.5.1. Standard INQUIRY Data...........................7-19
7.2.5.2. Vital Product Data..............................7-24
7.2.6. LOG SELECT Command.......................................7-25
7.2.7. LOG SENSE Command........................................7-28
7.2.8. MODE SELECT(6) Command...................................7-30
7.2.9. MODE SELECT(10) Command..................................7-32
7.2.10. MODE SENSE(6) Command...................................7-33
7.2.10.1. Current Values................................7-34
7.2.10.2. Changeable Values.............................7-35
7.2.10.3. Default Values................................7-35
7.2.10.4. Saved Values..................................7-35
7.2.10.5. Initial Responses.............................7-35
7.2.11. MODE SENSE(10) Command..................................7-36
7.2.12. READ BUFFER.............................................7-37
7.2.12.1. Combined Header and Data Mode (000b)..........7-38
7.2.12.2. Vendor-Specific Mode (001b)...................7-38
7.2.12.3. Data Mode (010b)..............................7-38
7.2.12.4. Descriptor Mode (011b)........................7-39
7.2.13. RECEIVE DIAGNOSTIC RESULTS Command......................7-40
7.2.14. REQUEST SENSE Command...................................7-41
7.2.14.1. Sense-Key Specific............................7-46
7.2.14.2. Deferred Errors...............................7-48
7.2.15. SEND DIAGNOSTIC Command.................................7-57
7.2.16. TEST UNIT READY Command.................................7-59
7.2.17. WRITE BUFFER Command....................................7-60
7.2.17.1. Combined Header and Data Mode (000b)..........7-61
7.2.17.2. Vendor-Specific Mode (001b)...................7-61
7.2.17.3. Data Mode (010b)..............................7-61
7.2.17.4. Download Microcode Mode (100b)................7-62
7.2.17.5. Download Microcode and Save Mode (101b).......7-62
7.3. Parameters for All Device Types ................................7-62
7.3.1. Diagnostic Parameters ...................................7-62
7.3.1.1. Supported Diagnostic Pages......................7-63
7.3.2. Log Parameters...........................................7-65
7.3.2.1. Buffer Over-Run/Under-Run Page..................7-69
7.3.2.2. Error Counter Pages.............................7-71
7.3.2.3. Last n Error Events Page........................7-72
7.3.2.4. Non-Medium Error Page ..........................7-72
7.3.2.5. Supported Log Pages.............................7-73
7.3.3. Mode Parameters .........................................7-73
7.3.3.1. Control Mode Page...............................7-78
7.3.3.2. Disconnect-Reconnect Page.......................7-81
7.3.3.3. Peripheral Device Page..........................7-83
7.3.4. Vital Product Data Parameters............................7-84
7.3.4.1. ASCII Implemented Operating Definition Page.....7-85
7.3.4.2. ASCII Information Page..........................7-86
7.3.4.3. Implemented Operating Definition Page...........7-87
7.3.4.4. Supported Vital Product Data Pages..............7-88
7.3.4.5. Unit Serial Number Page.........................7-89
8. Direct-Access Devices.................................................8-1
8.1. Direct-Access Device Model.......................................8-1
8.1.1. Removable Medium..........................................8-1
8.1.2. Logical Blocks............................................8-2
8.1.3. Ready State...............................................8-2
8.1.4. Initialization............................................8-2
8.1.5. Medium Defects............................................8-3
8.1.6. Data Cache................................................8-3
8.1.7. Reservation...............................................8-5
8.1.8. Seek and Rezero...........................................8-7
8.1.9. Notched Drives............................................8-7
8.1.10. Rotational Position Locking .............................8-7
8.1.11. Relative Addressing......................................8-7
8.1.12. Error Reporting..........................................8-7
8.1.13. Examples.................................................8-8
8.1.13.1. Rotating Media.................................8-8
8.1.13.2. Sequential Media...............................8-9
8.1.13.3. Memory Media..................................8-10
8.2. Commands for Direct-Access Devices..............................8-11
8.2.1. FORMAT UNIT Command......................................8-12
8.2.1.1. Defect List Formats.............................8-18
8.2.1.2. Initialization Pattern Option...................8-20
8.2.2. LOCK UNLOCK CACHE Command................................8-23
8.2.3. PRE-FETCH Command........................................8-24
8.2.4. PREVENT ALLOW MEDIUM REMOVAL Command.....................8-25
8.2.5. READ(6) Command..........................................8-26
8.2.6. READ(10) Command.........................................8-27
8.2.7. READ CAPACITY Command....................................8-29
8.2.8. READ DEFECT DATA Command.................................8-30
8.2.9. READ LONG Command........................................8-33
8.2.10. REASSIGN BLOCKS Command.................................8-34
8.2.11. RELEASE Command.........................................8-36
8.2.11.1. Logical Unit Release (Mandatory)..............8-36
8.2.11.2. Extent Release (Optional).....................8-37
8.2.11.3. Third-Party Release (Mandatory)...............8-37
8.2.12. RESERVE Command.........................................8-38
8.2.12.1. Logical Unit Reservation (Mandatory)..........8-38
8.2.12.2. Extent Reservation (Optional).................8-39
8.2.12.3. Third Party Reservation (Mandatory)...........8-41
8.2.12.4. Superseding Reservations (Mandatory)..........8-42
8.2.13. REZERO UNIT Command.....................................8-42
8.2.14. SEARCH DATA Commands....................................8-43
8.2.14.1. SEARCH DATA EQUAL Command.....................8-46
8.2.14.2. SEARCH DATA HIGH Command......................8-46
8.2.14.3. SEARCH DATA LOW Command.......................8-46
8.2.15. SEEK(6) and SEEK(10) Commands...........................8-47
8.2.16. SET LIMITS Command......................................8-48
8.2.17. START STOP UNIT Command.................................8-49
8.2.18. SYNCHRONIZE CACHE Command...............................8-50
8.2.19. VERIFY Command..........................................8-51
8.2.20. WRITE(6) Command........................................8-52
8.2.21. WRITE(10) Command.......................................8-53
8.2.22. WRITE AND VERIFY Command................................8-54
8.2.23. WRITE LONG Command......................................8-55
8.2.24. WRITE SAME Command......................................8-56
8.3. Parameters for Direct-Access Devices............................8-57
8.3.1. Diagnostic Parameters....................................8-57
8.3.1.1. Translate Address Page - SEND DIAGNOSTIC .......8-57
8.3.1.2. Translate Address Page - RECEIVE DIAGNOSTIC ....8-58
8.3.2. Log Parameters...........................................8-60
8.3.3. Mode Parameters..........................................8-61
8.3.3.1. Caching Page ...................................8-63
8.3.3.2. Flexible Disk Page..............................8-67
8.3.3.3. Format Device Page..............................8-72
8.3.3.4. Medium Types Supported Page.....................8-75
8.3.3.5. Notch and Partition Page........................8-76
8.3.3.6. Read-Write Error Recovery Page..................8-78
8.3.3.7. Rigid Disk Drive Geometry Page..................8-86
8.3.3.8. Verify Error Recovery Page......................8-89
8.4. Glossary for Direct-Access Devices..............................8-90
9. Sequential-Access Devices.............................................9-1
9.1. Sequential-Access Device Model...................................9-1
9.1.1. Physical Elements.........................................9-1
9.1.2. Data Storage Characteristics..............................9-2
9.1.3. Partitions within a Volume................................9-4
9.1.4. Logical Elements within a Partition.......................9-6
9.1.5. Data Buffering............................................9-7
9.1.6. Recorded Object Descriptors (Block Identifiers)...........9-8
9.1.7. Direction and Position Definitions........................9-9
9.1.8. Error Reporting..........................................9-10
9.2. Command Descriptions for Sequential-Access Devices..............9-12
9.2.1. ERASE Command............................................9-13
9.2.2. LOAD UNLOAD Command......................................9-14
9.2.3. LOCATE Command...........................................9-16
9.2.4. READ Command.............................................9-17
9.2.5. READ BLOCK LIMITS Command................................9-20
9.2.6. READ POSITION Command....................................9-21
9.2.7. READ REVERSE Command.....................................9-23
9.2.8. RECOVER BUFFERED DATA Command............................9-24
9.2.9. RELEASE UNIT Command.....................................9-26
9.2.9.1. Third-Party Release ............................9-26
9.2.10. RESERVE UNIT Command....................................9-27
9.2.10.1. Third-Party Reservation.......................9-28
9.2.10.2. Superseding Reservations......................9-28
9.2.11. REWIND Command..........................................9-29
9.2.12. SPACE Command...........................................9-30
9.2.13. VERIFY Command..........................................9-33
9.2.14. WRITE Command...........................................9-34
9.2.15. WRITE FILEMARKS Command.................................9-36
9.3. Parameters for Sequential-Access Devices........................9-38
9.3.1. Diagnostic Parameters....................................9-38
9.3.2. Log Parameters...........................................9-39
9.3.3. Mode Parameters..........................................9-39
9.3.3.1. Device Configuration Page.......................9-43
9.3.3.2. Medium Partition Page(1)........................9-47
9.3.3.3. Medium Partition Page(2-4)......................9-49
9.3.3.4. Read-Write Error Recovery Page..................9-50
9.4. Glossary for Sequential Access Devices..........................9-52
10. Commands for Printer Devices.........................................10-1
10.1. Model for Printer Devices .....................................10-1
10.2. Commands for Printer Devices...................................10-2
10.2.1. FORMAT Command.........................................10-3
10.2.2. PRINT Command..........................................10-4
10.2.3. RECOVER BUFFERED DATA Command..........................10-4
10.2.4. SLEW AND PRINT Command.................................10-5
10.2.5. STOP PRINT Command.....................................10-6
10.2.6. SYNCHRONIZE BUFFER Command.............................10-7
10.3. Parameters for Printer Devices.................................10-8
10.3.1. Diagnostic Parameters..................................10-8
10.3.2. Log Parameters.........................................10-8
10.3.3. Mode Parameters........................................10-8
10.3.3.1. Parallel Printer Interface Parameters Page..10-10
10.3.3.2. Printer Options Page........................10-12
10.3.3.3. Serial Printer Interface Parameters Page....10-15
11. Processor Devices....................................................11-1
11.1. Model for Processor Devices....................................11-1
11.1.1. Host to Host Communication, SEND Only..................11-2
11.1.2. Host to Host Communication, SEND and RECEIVE...........11-2
11.1.3. Host to Special Output Peripheral......................11-2
11.1.4. Host to Special Input Peripheral.......................11-3
11.2. Commands for Processor Devices.................................11-4
11.2.1. RECEIVE Command........................................11-5
11.2.2. SEND Command...........................................11-5
11.3. Parameters for Processor Devices...............................11-7
11.3.1. Diagnostic Parameters..................................11-7
11.3.2. Log Parameters.........................................11-7
11.4. Glossary for Processor Devices.................................11-8
12. Write-Once Devices...................................................12-1
12.1. Model for Write-Once Devices...................................12-1
12.1.1. Logical Blocks.........................................12-1
12.1.2. Initialization.........................................12-1
12.1.3. Physical Medium Defects................................12-1
12.1.4. Error Reporting........................................12-2
12.2. Commands for Write-Once Devices................................12-3
12.3. Parameters for Write-Once Devices..............................12-4
12.4. Glossary for Write-Once Devices................................12-4
13. CD-ROM Devices.......................................................13-1
13.1. Model for CD-ROM Devices.......................................13-1
13.1.1. CD-ROM Media Organization..............................13-1
13.1.2. CD-ROM Physical Data Format............................13-4
13.1.2.1. Frame Format for Audio.......................13-4
13.1.2.2. Sector Format for Data.......................13-4
13.1.2.3. Sub-channel Information Formats..............13-5
13.1.3. CD Audio Error Reporting...............................13-6
13.1.4. CD-ROM Ready Condition/Not Ready Condition.............13-6
13.1.5. CD-ROM Address Reporting Formats (MSF Bit).............13-6
13.1.6. Sensing Support for CD-Audio Commands. ................13-7
13.1.7. Error Reporting.......................................13-10
13.2. Commands for CD-ROM Devices...................................13-11
13.2.1. PAUSE RESUME Command..................................13-13
13.2.2. PLAY AUDIO(10) Command................................13-14
13.2.3. PLAY AUDIO(12) Command ...............................13-16
13.2.4. PLAY AUDIO MSF Command................................13-17
13.2.5. PLAY AUDIO TRACK INDEX Command........................13-18
13.2.6. PLAY AUDIO TRACK RELATIVE(10) Command.................13-20
13.2.7. PLAY AUDIO TRACK RELATIVE(12) Command.................13-21
13.2.8. READ CD-ROM CAPACITY Command..........................13-22
13.2.9. READ HEADER Command...................................13-24
13.2.10. READ SUB-CHANNEL Command.............................13-26
13.2.11. READ TOC Command.....................................13-34
13.3. Parameters for CD-ROM Devices.................................13-36
13.3.1. Diagnostic Parameters.................................13-36
13.3.2. Log Parameters........................................13-36
13.3.3. Mode Parameters.......................................13-37
13.3.3.1. CD-ROM Audio Control Parameters.............13-40
13.3.3.2. CD-ROM Device Parameters ...................13-42
13.3.3.3. Read Error Recovery Parameters .............13-44
13.3.3.4. Verify Error Recovery Parameters............13-52
13.4. Glossary for CD-ROM Devices...................................13-53
14. Scanner Devices......................................................14-1
14.1. Model for Scanner Devices......................................14-1
14.2. Commands for Scanner Devices...................................14-3
14.2.1. GET DATA BUFFER STATUS Command.........................14-4
14.2.2. GET WINDOW Command.....................................14-6
14.2.3. OBJECT POSITION Command...............................14-12
14.2.4. READ Command..........................................14-14
14.2.5. SCAN Command..........................................14-16
14.2.6. SEND Command..........................................14-17
14.2.7. SET WINDOW Command....................................14-18
14.3. Parameters for Scanner Devices................................14-19
14.3.1. Diagnostic Parameters.................................14-19
14.3.2. Log Parameters........................................14-20
14.3.3. Mode Parameters.......................................14-20
14.3.3.1. Measurement Units Page......................14-21
14.4. Glossary for Scanner Devices..................................14-22
15. Optical Memory Devices...............................................15-1
15.1. Model for Optical Memory Devices...............................15-1
15.1.1. Defect Management......................................15-2
15.1.2. Error Reporting........................................15-2
15.2. Commands for Optical Memory Devices............................15-4
15.2.1. ERASE(10) Command......................................15-6
15.2.2. ERASE(12) Command......................................15-7
15.2.3. MEDIUM SCAN Command....................................15-8
15.2.4. READ(12) Command .....................................15-11
15.2.5. READ DEFECT DATA(12) Command .........................15-12
15.2.6. READ GENERATION Command...............................15-14
15.2.7. READ UPDATED BLOCK(10) Command........................15-15
15.2.8. SEARCH DATA(12) Commands..............................15-16
15.2.9. SET LIMITS(12) Command ...............................15-17
15.2.10. UPDATE BLOCK Command.................................15-18
15.2.11. VERIFY(10) Command...................................15-19
15.2.12. VERIFY(12) Command...................................15-20
15.2.13. WRITE(10) Command....................................15-21
15.2.14. WRITE(12) Command....................................15-22
15.2.15. WRITE AND VERIFY(10) Command.........................15-23
15.2.16. WRITE AND VERIFY(12) Command.........................15-24
15.3. Parameters for Optical Memory Devices.........................15-25
15.3.1. Diagnostic Parameters.................................15-25
15.3.2. Log Parameters........................................15-25
15.3.3. Mode Parameters.......................................15-26
15.3.3.1. Optical Memory Page.........................15-29
15.4. Glossary for Optical Memory Devices...........................15-30
16. Medium-Changer Devices...............................................16-1
16.1. Medium-Changer Device Model....................................16-1
16.1.1. Medium-Changer Elements................................16-1
16.1.1.1. Medium Transport Elements....................16-2
16.1.1.2. Storage Elements.............................16-2
16.1.1.3. Import Export Elements.......................16-2
16.1.1.4. Data Transfer Element .......................16-3
16.1.2. SCSI Addressing of Medium Changer Devices .............16-3
16.1.3. Data Access Operations Using a Medium Changer Device ..16-3
16.1.4. Element Status Maintenance Requirements ...............16-4
16.1.5. Volume Tags............................................16-4
16.1.5.1. Volume Tag Format ...........................16-4
16.1.5.2. Primary and Alternate Volume Tag Information.16-5
16.2. Commands for Medium Changer Devices............................16-6
16.2.1. EXCHANGE MEDIUM Command................................16-7
16.2.2. INITIALIZE ELEMENT STATUS Command......................16-9
16.2.3. MOVE MEDIUM Command...................................16-10
16.2.4. POSITION TO ELEMENT Command...........................16-11
16.2.5. READ ELEMENT STATUS Command...........................16-12
16.2.5.1. Element Status Data ........................16-13
16.2.5.2. Element Status Page ........................16-16
16.2.5.3. Medium Transport Element Descriptor.........16-17
16.2.5.4. Storage Element Descriptor..................16-19
16.2.5.5. Import Export Element Descriptor............16-20
16.2.5.6. Data Transfer Element Descriptor............16-22
16.2.6. REQUEST VOLUME ELEMENT ADDRESS Command................16-24
16.2.7. RELEASE Command.......................................16-27
16.2.7.1. Logical Unit Release........................16-27
16.2.7.2. Element Release (Optional)..................16-27
16.2.7.3. Third Party Release ........................16-27
16.2.8. RESERVE Command.......................................16-28
16.2.8.1. Logical Unit Reservation....................16-28
16.2.8.2. Element Reservation (Optional)..............16-29
16.2.8.3. Third Party Reservation.....................16-30
16.2.8.4. Superseding Reservations....................16-31
16.2.9. SEND VOLUME TAG Command...............................16-31
16.3. Parameters for Medium Changer Devices.........................16-34
16.3.1. Diagnostic Parameters.................................16-34
16.3.2. Log Parameters........................................16-34
16.3.3. Mode Parameters.......................................16-35
16.3.3.1. Device Capabilities Page....................16-36
16.3.3.2. Element Address Assignment Page.............16-38
16.3.3.3. Transport Geometry Parameters Page..........16-40
16.4. Glossary for Medium Changer Devices...........................16-41
17. Communications Devices...............................................17-1
17.1. Communications Device Model....................................17-1
17.1.1. Implementation Examples................................17-3
17.1.1.1. Host to Host Communications .................17-3
17.1.1.2. Host to Device Communications ...............17-3
17.1.1.3. Multiple Role Communications ................17-3
17.2. Command Descriptions for Communications Devices................17-4
17.2.1. GET MESSAGE(6) Command.................................17-5
17.2.2. GET MESSAGE(10) Command................................17-6
17.2.3. GET MESSAGE(12) Command................................17-7
17.2.4. SEND MESSAGE(6) Command................................17-8
17.2.5. SEND MESSAGE(10) Command...............................17-9
17.2.6. SEND MESSAGE(12) Command..............................17-10
17.3. Parameters for Communication Devices..........................17-11
17.3.1. Diagnostic Parameters.................................17-11
17.3.2. Log Parameters........................................17-11
17.3.3. Mode Parameters.......................................17-12
17.4. Glossary for Communications Devices...........................17-13
LIST OF APPENDICES
A. SCSI Signal Sequence Example..........................................A-1
B. Typical Bus Phase Sequence............................................B-1
C. SCSI System Operation.................................................C-1
C.1. Host Memory, Host Adapter, SCSI Target Relationship..............C-1
C.2. SCSI READ Command Example........................................C-2
C.3. I/O Channel Concept..............................................C-4
D. Additional Medium Type and Density Code Standards.....................D-1
E. Data Integrity and I/O Process Queuing................................E-1
E.1. Glossary.........................................................E-1
E.2. Thesis...........................................................E-2
F. Power On Protocols - Recommended Initialization Procedure.............F-1
F.1. System Initialization............................................F-1
F.2. General Procedure for Initializing Devices.......................F-2
F.2.1. General Procedure Executed by Initiators..................F-2
F.2.2. Procedure Executed by Temporary Initiators................F-3
F.2.3. Verify State Test.........................................F-3
F.3. Direct-Access Device Initialization Procedure....................F-5
F.3.1. Boot Device Initialization Procedure......................F-5
F.3.2. General Direct-Access Device Initialization Procedure.....F-6
F.3.3. Direct-Access Device Medium Initialization Procedure......F-8
F.4. Sequential Access Device Initialization Procedure...............F-10
F.4.1. General Sequential-Access Device Initialization..........F-10
F.5. Asynchronous Event Notification Initialization Procedure........F-11
G. Fast SCSI Skew Time...................................................G-1
H. Other SCSI Standardization Activities.................................H-1
H.1. SCSI-3 Standards Project.........................................H-1
H.2. Digital Data Exchange for Color Electronic Prepress Systems......H-1
H.3. Fiber Channel....................................................H-1
I. Numeric Order Codes...................................................I-1
J. Vendor Identification.................................................J-1
LIST OF FIGURES
4-1: 50/68-Contact Nonshielded High-Density SCSI Device Connector.........4-6
4-2: 50/68-Contact Nonshielded High-Density Cable Connector...............4-7
4-3: 50-Contact Nonshielded Low-Density SCSI Device Connector.............4-8
4-4: 50-Contact Nonshielded Low-Density Cable Connector...................4-9
4-5: 50/68-Contact Shielded High-density SCSI Device Connector...........4-10
4-6: 50/68-Contact Shielded High-density Cable Connector.................4-11
4-7: 50-Contact Shielded Low-Density SCSI Device Connector...............4-12
4-8: 50-Contact Shielded Low-Density Cable Connector.....................4-13
4-9: Termination for Single-Ended Devices................................4-22
4-10: Termination for Differential Devices...............................4-23
4-11: Differential Driver Protection Circuit.............................4-23
4-12: SCSI ID Bits.......................................................4-24
4-13: Sample SCSI Configurations.........................................4-25
5-1: Wide SCSI Byte Ordering..............................................5-9
5-2: Phase Sequences.....................................................5-16
5-3: Simplified SCSI System..............................................5-16
9-1: Typical Volume Layout................................................9-2
9-2: Typical Medium Track Layout..........................................9-2
9-3: Serpentine Recording Example ........................................9-3
9-4: Parallel Recording Example...........................................9-3
9-5: Helical Scan Recording Example.......................................9-3
9-6: Early-Warning Example................................................9-4
9-7: Partitioning Example - One Partition per Track Group.................9-5
9-8: Partitioning Example - One Partition per Two Track Groups............9-5
9-9: Partitioning Example - Two Partitions per Track Group................9-5
10-1: SCSI Printer Model..................................................10-1
16-1: Illustration of Element Status Data Structure......................16-14
A-1: SCSI Signal Sequence Example.........................................A-2
C-1: Snapshot Prior to Initial Selection..................................C-5
C-2: Snapshot Prior to Data Transfer......................................C-6
F-1: Verify State Test....................................................F-4
G-1: Fast SCSI Jitter Budget..............................................G-1
G-2: Mapping of Jitter to SCSI............................................G-2
LIST OF TABLES
4-1: Cross-Reference to Connector Contact Assignments....................4-14
4-2: Single-Ended Contact Assignments - A Cable..........................4-15
4-3: Single-Ended Contact Assignments - B Cable..........................4-16
4-4: Differential Contact Assignments - A Cable..........................4-17
4-5: Differential Contact Assignments - B Cable..........................4-18
4-6: Signal Sources......................................................4-28
4-7: SCSI Bus Timing Values..............................................4-29
5-1: Information Transfer Phases..........................................5-6
5-2: Message Codes.......................................................5-18
5-3: Extended Message Format.............................................5-19
5-4: Extended Message Codes..............................................5-19
5-5: IDENTIFY Message Format.............................................5-23
5-6: IGNORE WIDE RESIDUE Message Format..................................5-24
5-7: MODIFY DATA POINTER.................................................5-26
5-8: Queue Tag Message Format............................................5-27
5-9: SYNCHRONOUS DATA TRANSFER REQUEST...................................5-29
5-10: WIDE DATA TRANSFER MESSAGE.........................................5-33
6-1: Typical Command Descriptor Block for Six-byte Commands...............6-2
6-2: Typical Command Descriptor Block for Ten-byte Commands...............6-3
6-3: Typical Command Descriptor Block for Twelve-byte Commands............6-4
6-4: Operation Code.......................................................6-5
6-5: Control Field........................................................6-7
6-6: Status Byte..........................................................6-8
6-7: Status Byte Code ....................................................6-8
6-8: Commands in Order Received by Target................................6-21
6-9: Commands in Order of Execution......................................6-21
6-10: Modified by HEAD OF QUEUE TAG Message..............................6-22
7-1: Commands for All Device Types........................................7-3
7-2: CHANGE DEFINITION Command............................................7-4
7-3: Definition Parameter Field...........................................7-4
7-4: COMPARE Command......................................................7-7
7-5: COPY Command.........................................................7-8
7-6: COPY Parameter List..................................................7-9
7-7: COPY Function Codes.................................................7-10
7-8: Segment Descriptor for COPY Function Codes 00h and 01h..............7-11
7-9: Segment Descriptor for COPY Function Code 02h.......................7-13
7-10: Segment Descriptor for COPY Function Code 03h......................7-14
7-11: Segment Descriptor for COPY Function Code 04h......................7-15
7-12: Pad and Cat Bit Definition.........................................7-16
7-13: COPY AND VERIFY Command............................................7-17
7-14: INQUIRY Command....................................................7-18
7-15: Standard INQUIRY Data Format.......................................7-20
7-16: Peripheral Qualifier...............................................7-21
7-17: Peripheral Device Type.............................................7-21
7-18: ANSI-Approved Version..............................................7-22
7-19: LOG SELECT Command.................................................7-25
7-20: Page Control Field.................................................7-26
7-21: LOG SENSE Command..................................................7-28
7-22: MODE SELECT(6) Command.............................................7-30
7-23: MODE SELECT(10) Command............................................7-32
7-24: MODE SENSE(6) Command..............................................7-33
7-25: Page Control Field.................................................7-33
7-26: Page Code Usage for All Devices ...................................7-34
7-27: MODE SENSE(10) Command.............................................7-36
7-28: READ BUFFER Command................................................7-37
7-29: READ BUFFER Mode Field.............................................7-37
7-30: READ BUFFER Header.................................................7-38
7-31: READ BUFFER Descriptor.............................................7-39
7-32: Buffer Offset Boundary.............................................7-39
7-33: RECEIVE DIAGNOSTIC RESULTS Command.................................7-40
7-34: REQUEST SENSE Command..............................................7-41
7-35: Error Codes 70h and 71h Sense Data Format..........................7-43
7-36: Field Pointer Bytes................................................7-46
7-37: Actual Retry Count Bytes...........................................7-47
7-38: Format Progress Indication Bytes...................................7-47
7-39: Sense Key (0h-7h) Descriptions.....................................7-50
7-40: Sense Key (8h-Fh) Descriptions.....................................7-51
7-41: ASC and ASCQ Assignments...........................................7-52
7-42: SEND DIAGNOSTIC Command............................................7-57
7-43: TEST UNIT READY Command............................................7-59
7-44: Preferred TEST UNIT READY Responses................................7-59
7-45: WRITE BUFFER Command...............................................7-60
7-46: WRITE BUFFER Mode Field............................................7-60
7-47: Diagnostic Page Format.............................................7-63
7-48: Diagnostic Page Codes..............................................7-63
7-49: Supported Diagnostic Pages.........................................7-64
7-50: Log Page Format....................................................7-65
7-51: Log Parameter......................................................7-66
7-52: Threshold Met Criteria.............................................7-67
7-53: Log Page Codes.....................................................7-69
7-54: Parameter Code Field for Buffer Over-Run/Under-Run Counters........7-70
7-55: Count Basis Definition.............................................7-70
7-56: Cause Field Definition.............................................7-71
7-57: Parameter Codes for Error Counter Pages............................7-71
7-58: Non-Medium Error Event Parameter Codes.............................7-72
7-59: Supported Log Pages................................................7-73
7-60: Mode Parameter List................................................7-74
7-61: Mode Parameter Header(6)...........................................7-74
7-62: Mode Parameter Header(10)..........................................7-75
7-63: Mode Parameter Block Descriptor....................................7-76
7-64: Mode Page Format...................................................7-77
7-65: Mode Page Codes....................................................7-78
7-66: Control Mode Page..................................................7-78
7-67: Queue Algorithm Modifier...........................................7-79
7-68: Disconnect-Reconnect Page..........................................7-81
7-69: Data Transfer Disconnect Control...................................7-83
7-70: Peripheral Device Page.............................................7-83
7-71: Interface Identifier Codes.........................................7-84
7-72: Vital Product Data Page Codes......................................7-84
7-73: ASCII Implemented Operating Definition ............................7-85
7-74: ASCII Information Page.............................................7-86
7-75: Implemented Operating Definition Page..............................7-87
7-76: Supported Vital Product Data Pages.................................7-88
7-77: Unit Serial Number Page............................................7-89
8-1: Commands for Direct-Access Devices..................................8-11
8-2: FORMAT UNIT Command.................................................8-12
8-3: FORMAT UNIT Parameter List..........................................8-15
8-4: Defect List Header..................................................8-15
8-5: FORMAT UNIT Defect Descriptor Format and Requirements...............8-17
8-6: Defect Descriptor - Block Format....................................8-19
8-7: Defect Descriptor - Bytes From Index Format.........................8-19
8-8: Defect Descriptor - Physical Sector Format..........................8-20
8-9: Initialization Pattern Descriptor...................................8-20
8-10: Initialization Pattern Modifier....................................8-21
8-11: Initialization Pattern Type........................................8-22
8-12: LOCK UNLOCK CACHE Command..........................................8-23
8-13: PRE-FETCH Command..................................................8-24
8-14: PREVENT ALLOW MEDIUM REMOVAL Command...............................8-25
8-15: READ(6) Command....................................................8-26
8-16: READ(10) Command...................................................8-27
8-17: READ CAPACITY Command..............................................8-29
8-18: READ CAPACITY Data.................................................8-30
8-19: READ DEFECT DATA Command...........................................8-30
8-20: READ DEFECT DATA Defect List.......................................8-31
8-21: READ LONG Command..................................................8-33
8-22: REASSIGN BLOCKS Command............................................8-34
8-23: REASSIGN BLOCKS Defect List........................................8-35
8-24: RELEASE Command....................................................8-36
8-25: RESERVE Command....................................................8-38
8-26: Data Format of Extent Descriptors..................................8-40
8-27: REZERO UNIT Command................................................8-42
8-28: SEARCH DATA Commands...............................................8-43
8-29: SEARCH DATA Parameter List.........................................8-45
8-30: SEEK(6) Command....................................................8-47
8-31: SEEK(10) Command...................................................8-47
8-32: SET LIMITS Command.................................................8-48
8-33: START STOP UNIT Command............................................8-49
8-34: SYNCHRONIZE CACHE Command..........................................8-50
8-35: VERIFY Command.....................................................8-51
8-36: WRITE(6) Command...................................................8-52
8-37: WRITE(10) Command..................................................8-53
8-38: WRITE AND VERIFY Command...........................................8-54
8-39: WRITE LONG Command.................................................8-55
8-40: WRITE SAME Command.................................................8-56
8-41: Diagnostic Page Codes..............................................8-57
8-42: Translate Address Page - SEND DIAGNOSTIC ..........................8-58
8-43: Translate Address Page - RECEIVE DIAGNOSTIC .......................8-59
8-44: Log Page Codes.....................................................8-60
8-45: Direct-Access Medium-Type Codes....................................8-61
8-46: Device Specific Parameter..........................................8-62
8-47: Mode Page Codes ...................................................8-62
8-48: Caching Page.......................................................8-63
8-49: Demand Read and Write Retention Priority...........................8-65
8-50: Flexible Disk Page (Bytes 0-19)....................................8-67
8-51: Flexible Disk Page (Bytes 20-31)...................................8-68
8-52: Format Device Page.................................................8-72
8-53: Medium Types Supported Page........................................8-75
8-54: Notch Page.........................................................8-76
8-55: Read-Write Error Recovery Page.....................................8-78
8-56: Error Recovery Bit Definitions.....................................8-80
8-57: Combined Error Recovery Parameter Descriptions(1)..................8-81
8-58: Combined Error Recovery Parameter Descriptions(2)..................8-82
8-59: Combined Error Recovery Parameter Descriptions(3)..................8-83
8-60: Combined Error Recovery Parameter Descriptions(4)..................8-84
8-61: Rigid Disk Drive Geometry Page.....................................8-86
8-62: Rotational Position Locking........................................8-88
8-63: Verify Error Recovery Page.........................................8-89
9-1: Commands for Sequential-Access Devices..............................9-12
9-2: ERASE Command.......................................................9-13
9-3: LOAD UNLOAD Command.................................................9-14
9-4: LOCATE Command......................................................9-16
9-5: READ Command........................................................9-17
9-6: READ BLOCK LIMITS Command...........................................9-20
9-7: READ BLOCK LIMITS Data..............................................9-20
9-8: READ POSITION Command...............................................9-21
9-9: READ POSITION Data Format...........................................9-22
9-10: READ REVERSE Command...............................................9-23
9-11: RECOVER BUFFERED DATA Command......................................9-24
9-12: RELEASE UNIT Command...............................................9-26
9-13: RESERVE UNIT Command...............................................9-27
9-14: REWIND Command.....................................................9-29
9-15: SPACE Command......................................................9-30
9-16: VERIFY Command.....................................................9-33
9-17: WRITE Command......................................................9-34
9-18: WRITE FILEMARKS Command............................................9-36
9-19: Diagnostic Page Codes..............................................9-38
9-20: Log Page Codes.....................................................9-39
9-21: Device-Specific Parameter .........................................9-39
9-22: Sequential-Access Density Codes....................................9-41
9-23: Mode Page Codes....................................................9-42
9-24: Device Configuration Page..........................................9-43
9-25: Medium Partition Page(1)...........................................9-47
9-26: Medium Partition Page(2-4).........................................9-49
9-27: Read-Write Error Recovery Page.....................................9-50
10-1: Commands for Printer Devices........................................10-2
10-2: FORMAT Command......................................................10-3
10-3: PRINT Command.......................................................10-4
10-4: RECOVER BUFFERED DATA Command.......................................10-4
10-5: SLEW AND PRINT Command..............................................10-5
10-6: STOP PRINT Command..................................................10-6
10-7: SYNCHRONIZE BUFFER Command..........................................10-7
10-8: Diagnostic Page Codes...............................................10-8
10-9: Log Page Codes......................................................10-8
10-10: Printer Device Specific Parameter..................................10-9
10-11: Mode Page Codes....................................................10-9
10-12: Parallel Printer Interface Parameters.............................10-10
10-13: Printer Options...................................................10-12
10-14: Serial Printer Interface Parameters...............................10-15
11-1: Commands for Processor Devices......................................11-4
11-2: RECEIVE Command.....................................................11-5
11-3: SEND Command........................................................11-5
11-4: SEND Command - AEN Data Format......................................11-6
11-5: Diagnostic Page Codes...............................................11-7
11-6: Log Page Codes......................................................11-7
12-1: Commands for Write-Once Devices.....................................12-3
13-1: MSF Address Format..................................................13-7
13-2: Example Mixed Mode CD-ROM Disc Layout...............................13-8
13-3: Commands for CD-ROM Devices(1).....................................13-11
13-4: Commands for CD-ROM Devices(2).....................................13-12
13-5: PAUSE RESUME Command...............................................13-13
13-6: PLAY AUDIO(10) Command ............................................13-14
13-7: PLAY AUDIO(12) Command ............................................13-16
13-8: PLAY AUDIO MSF Command.............................................13-17
13-9: PLAY AUDIO TRACK INDEX Command.....................................13-18
13-10: PLAY AUDIO TRACK RELATIVE(10) Command.............................13-20
13-11: PLAY AUDIO TRACK RELATIVE(12) Command.............................13-21
13-12: READ CD-ROM CAPACITY Command......................................13-22
13-13: READ CAPACITY Data Format.........................................13-23
13-14: READ HEADER Command...............................................13-24
13-15: READ HEADER Data Format...........................................13-25
13-16: CD-ROM Data Mode Codes............................................13-25
13-17: READ SUB-CHANNEL Command..........................................13-26
13-18: Subchannel Data Format Codes......................................13-27
13-19: Sub-Q Channel Data Format.........................................13-28
13-20: Audio Status Codes................................................13-29
13-21: ADR Sub-channel Q Field...........................................13-30
13-22: Sub-channel Q Control Bits........................................13-30
13-23: CD-ROM Current Position Data Format...............................13-31
13-24: Media Catalog Number Data Format..................................13-32
13-25: Track International Standard Recording Code Data Format...........13-33
13-26: READ TOC Command..................................................13-34
13-27: READ TOC Data Format .............................................13-35
13-28: Diagnostic Page Codes.............................................13-36
13-29: Log Page Codes....................................................13-37
13-30: CD-ROM Medium Type Codes..........................................13-37
13-31: CD-ROM Device Specific Parameter..................................13-38
13-32: CD-ROM Density Codes..............................................13-38
13-33: Mode Page Codes...................................................13-39
13-34: CD-ROM Audio Control Parameters Page..............................13-40
13-35: Output Port Channel Selection.....................................13-42
13-36: CD-ROM Parameters Page............................................13-42
13-37: Inactivity Timer Multiplier Values................................13-43
13-38: Read Error Recovery Parameters Page...............................13-44
13-39: Error Recovery Parameter Bit Settings.............................13-45
13-40: CD-ROM Error Recovery Parameters 00h - 04h........................13-47
13-41: CD-ROM Error Recovery Procedures 05h - 07h........................13-48
13-42: CD-ROM Error Recovery Procedures 10h - 15h........................13-49
13-43: CD-ROM Error Recovery Procedures 20h - 24h........................13-50
13-44: CD-ROM Error Recovery Procedures 25h - 27h........................13-51
13-45: CD-ROM Error Recovery Procedures 30h - 35h........................13-52
13-46: Verify Error Recovery Parameters Page.............................13-52
14-1: Commands for Scanner Devices........................................14-3
14-2: GET DATA BUFFER STATUS Command......................................14-4
14-3: Data Buffer Status Format...........................................14-5
14-4: GET WINDOW Command..................................................14-6
14-5: Get Window Data Header..............................................14-7
14-6: Window Descriptor Bytes (1-23)......................................14-8
14-7: Window Descriptor Bytes (24 - 39)...................................14-9
14-8: Image Composition Codes............................................14-11
14-9: Padding Types......................................................14-11
14-10: Compression Types and Arguments...................................14-12
14-11: OBJECT POSITION Command...........................................14-12
14-12: Position Function.................................................14-13
14-13: READ Command......................................................14-14
14-14: Data Type Codes...................................................14-15
14-15: SCAN Command......................................................14-16
14-16: SEND Command......................................................14-17
14-17: SET WINDOW Command................................................14-18
14-18: Set Window Data Header............................................14-19
14-19: Diagnostic Page Codes.............................................14-19
14-20: Log Page Codes....................................................14-20
14-21: Mode Page Codes...................................................14-21
14-22: Measurement Units Page............................................14-21
14-23: Basic Measurement Units...........................................14-22
15-1: Commands for Optical Memory Devices(1)..............................15-4
15-2: Commands for Optical Memory Devices(2) .............................15-5
15-3: ERASE(10) Command...................................................15-6
15-4: ERASE(12) Command...................................................15-7
15-5: MEDIUM SCAN Command.................................................15-8
15-6: MEDIUM SCAN Parameter List.........................................15-10
15-7: READ(12) Command...................................................15-11
15-8: READ DEFECT DATA(12) Command.......................................15-12
15-9: READ DEFECT DATA(12) LIST HEADER...................................15-13
15-10: READ GENERATION Command...........................................15-14
15-11: Maximum Generation Data Block.....................................15-14
15-12: READ UPDATED BLOCK(10) Command....................................15-15
15-13: SEARCH DATA(12) Commands..........................................15-16
15-14: SET LIMITS(12) Command............................................15-17
15-15: UPDATE BLOCK Command .............................................15-18
15-16: VERIFY Command....................................................15-19
15-17: VERIFY(12) Command................................................15-20
15-18: WRITE(10) Command.................................................15-21
15-19: WRITE(12) Command.................................................15-22
15-20: WRITE AND VERIFY(10) Command......................................15-23
15-21: WRITE AND VERIFY(12) Command......................................15-24
15-22: Diagnostic Page Codes.............................................15-25
15-23: Log Page Codes....................................................15-25
15-24: Optical Memory Medium-Type Codes..................................15-26
15-25: Optical Memory Device Specific Parameter..........................15-26
15-26: Optical Memory Density Codes......................................15-28
15-27: Mode Page Codes...................................................15-29
15-28: Optical Memory Page...............................................15-29
16-1: Volume Tag Information Format.......................................16-5
16-2: Commands for Medium Changer Devices.................................16-6
16-3: EXCHANGE MEDIUM Command.............................................16-7
16-4: INITIALIZE ELEMENT STATUS Command...................................16-9
16-5: MOVE MEDIUM Command................................................16-10
16-6: POSITION TO ELEMENT Command........................................16-11
16-7: READ ELEMENT STATUS Command........................................16-12
16-8: Element Type Code..................................................16-13
16-9: Element Status Data................................................16-15
16-10: Element Status Page ..............................................16-16
16-11: Medium Transport Element Descriptor...............................16-17
16-12: Storage Element Descriptor........................................16-19
16-13: Import Export Element Descriptor..................................16-20
16-14: Data Transfer Element Descriptor..................................16-22
16-15: REQUEST VOLUME ELEMENT ADDRESS Command............................16-24
16-16: Volume Element Address Header Format..............................16-26
16-17: RELEASE Command...................................................16-27
16-18: RESERVE Command...................................................16-28
16-19: Data Format of Element List Descriptors...........................16-30
16-20: SEND VOLUME TAG Command...........................................16-31
16-21: Send Volume Tag Action Codes......................................16-32
16-22: Send Volume Tag Parameters Format.................................16-33
16-23: Diagnostic Page Codes.............................................16-34
16-24: Log Page Codes....................................................16-35
16-25: Mode Page Codes...................................................16-36
16-26: Device Capabilities Page..........................................16-36
16-27: Element Address Assignment Page...................................16-38
16-28: Transport Geometry Parameters Page................................16-40
17-1: Commands for Communications Devices.................................17-4
17-2: GET MESSAGE(6) Command..............................................17-5
17-3: GET MESSAGE(10) Command.............................................17-6
17-4: GET MESSAGE(12) Command.............................................17-7
17-5: SEND MESSAGE(6) Command.............................................17-8
17-6: SEND MESSAGE(10) Command............................................17-9
17-7: SEND MESSAGE(12) Command...........................................17-10
17-8: Diagnostic Page Codes..............................................17-11
17-9: Log Page Codes.....................................................17-11
17-10: Mode Page Codes...................................................17-12
B-1: Typical READ Command Phase Sequence..................................B-1
B-2: Typical READ Command Phase Sequence (Continued)......................B-2
D-1: Direct-Access Medium-Type Codes......................................D-2
D-2: Sequential-Access Density Codes......................................D-3
I-1: ASC and ASCQ Assignments.............................................I-1
I-2: SCSI-2 Operation Codes...............................................I-7
J-1: Vendor Identification List...........................................J-1