18 July 2001 T10/1236-D Revision 20
dpANS SCSI Primary Commands - 2 (SPC-2) iii
Contents
Page
Foreword................................................................................................................................................................. xiv
Introduction ............................................................................................................................................................. xvi
1 Scope ..................................................................................................................................................................... 1
2 Normative references............................................................................................................................................. 4
2.1 Normative references ................................................................................................................................... 4
2.2 Approved references .................................................................................................................................... 4
2.3 References under development ................................................................................................................... 4
3 Definitions, symbols, abbreviations, and conventions ............................................................................................ 5
3.1 Definitions..................................................................................................................................................... 5
3.2 Acronyms...................................................................................................................................................... 8
3.3 Keywords...................................................................................................................................................... 9
3.4 Conventions................................................................................................................................................ 10
3.5 Notation for procedures and functions........................................................................................................ 11
4 General Concepts ................................................................................................................................................ 12
4.1 Introduction................................................................................................................................................. 12
4.2 The request-response model...................................................................................................................... 12
4.3 The Command Descriptor Block (CDB)...................................................................................................... 12
4.3.1 CDB usage and structure ........................................................................................................................ 12
4.3.2 The fixed length CDB formats ................................................................................................................. 13
4.3.3 The variable length CDB formats ............................................................................................................ 16
4.3.4 Common CDB fields ................................................................................................................................ 17
4.3.4.1 Operation code ..................................................................................................................................... 17
4.3.4.2 Service action ....................................................................................................................................... 17
4.3.4.3 Logical block address ........................................................................................................................... 17
4.3.4.4 Transfer length ..................................................................................................................................... 18
4.3.4.5 Parameter list length............................................................................................................................. 18
4.3.4.6 Allocation length ................................................................................................................................... 18
4.3.4.7 Control .................................................................................................................................................. 18
5 Model common to all device types ....................................................................................................................... 19
5.1 Introduction to the model common to all device types................................................................................ 19
5.2 Commands implemented by all SCSI device servers................................................................................. 19
5.2.1 Summary of commands implemented by all SCSI device servers .......................................................... 19
5.2.2 Using the INQUIRY command................................................................................................................. 19
5.2.3 Using the REQUEST SENSE command ................................................................................................. 19
5.2.4 Using the TEST UNIT READY command................................................................................................ 19
5.3 Parameter rounding.................................................................................................................................... 19
5.4 Self-test Operations.................................................................................................................................... 20
5.4.1 Default self-test........................................................................................................................................ 20
5.4.2 The short and extended self-tests ........................................................................................................... 20
5.4.3 Self-test modes........................................................................................................................................ 20
5.4.3.1 Foreground mode ................................................................................................................................. 21
5.4.3.2 Background mode ................................................................................................................................ 21
5.4.3.3 Elements common to foreground and background self-test modes ..................................................... 22
5.5 Reservations............................................................................................................................................... 23
5.5.1 Reservations overview ............................................................................................................................ 23
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