ISO/IEC 14776-454:2018

Information technology - Small Computer System Interface (SCSI) - Part 454: SCSI Primary Commands - 4 (SPC-4)

ISO/IEC 14776-454:2018(E) provides for many different types of SCSI devices and specifies the interfaces, functions and operations necessary to ensure interoperability between conforming SCSI implementations. This standard defines the SCSI commands that are mandatory and optional for all SCSI devices.

General Information

• Status: Published
• Publication Date: 17-Apr-2018
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 35.200 - Interface and interconnection equipment
• Technical Committee: ISO/IEC JTC 1/SC 25 - Interconnection of information technology equipment
• Current Stage: PPUB - Publication issued
• Start Date: 02-Apr-2018
• Completion Date: 18-Apr-2018

Standards Content (Sample)

ISO/IEC 14776-454
Edition 1.0 2018-04
INTERNATIONAL
STANDARD
colour
inside
Information technology – Small Computer System Interface (SCSI) –
Part 454: SCSI Primary Commands – 4 (SPC-4)

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ISO/IEC 14776-454
Edition 1.0 2018-04
INTERNATIONAL
STANDARD
colour
inside
Information technology – Small Computer System Interface (SCSI) –

Part 454: SCSI Primary Commands – 4 (SPC-4)

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 35.200 ISBN 978-2-8322-5595-7

Contents
Page
1 Scope. 40
2 Normative references. 40
3 Terms, definitions, symbols, abbreviations, and conventions . 45
3.1 Terms and definitions . 45
3.2 Abbreviations and symbols. 65
3.2.1 Abbreviations. 65
3.2.2 Symbols. 67
3.2.3 Mathematical operators . 67
3.3 Keywords. 68
3.4 Conventions. 69
3.5 Numeric and character conventions . 70
3.5.1 Numeric conventions . 70
3.5.2 Units of measure . 70
3.5.3 Byte encoded character strings conventions. 71
3.6 Bit and byte ordering . 71
3.7 Notation conventions . 73
3.7.1 Notation for procedure calls. 73
3.7.2 Notation for state diagrams . 74
3.7.3 Notation for flowcharts. 75
3.7.4 Notation for UML figures. 75
3.7.4.1 Overview. 75
3.7.4.2 Class notation. 77
3.7.4.3 Class association relationships notation. 77
3.7.4.4 Class aggregation relationships notation. 78
3.7.4.5 Class generalization relationships notation . 80
3.7.4.6 Class dependency relationships notation . 81
3.7.4.7 Object notation . 81
3.7.5 Notation for EXTENDED COPY command segment descriptors . 81
4 General concepts. 82
4.1 Introduction. 82
4.2 Command Descriptor Block. 82
4.2.1 CDB usage and structure . 82
4.2.2 Fixed length CDB formats . 83
4.2.2.1 Formats for 6-byte CDBs. 83
4.2.2.1.1 Generic 6-byte CDB format . 83
4.2.2.1.2 Typical 6-byte CDB format . 83
4.2.2.2 Formats for 10-byte CDBs. 84
4.2.2.2.1 Generic 10-byte CDB format . 84
4.2.2.2.2 Typical 10-byte CDB format . 85
4.2.2.3 Formats for 12-byte CDBs. 86
4.2.2.3.1 Generic 12-byte CDB format . 86
4.2.2.3.2 Typical 12-byte CDB format . 86
4.2.2.3.3 MAINTENANCE IN CDB format . 87
4.2.2.3.4 MAINTENANCE OUT CDB format . 88
4.2.2.3.5 SERVICE ACTION IN(12) CDB format .88
4.2.2.3.6 SERVICE ACTION OUT(12) CDB format . 89
4.2.2.4 Formats for 16-byte CDBs. 89
4.2.2.4.1 Generic 16-byte CDB format . 89
4.2.2.4.2 Typical 16-byte CDB format, if eight-byte LBAs not supported . 90
4.2.2.4.3 Typical 16-byte CDB format with eight-byte LBAs supported. 91
4.2.2.4.4 SERVICE ACTION IN(16) CDB format .92

4.2.2.4.5 SERVICE ACTION OUT(16) CDB format . 92
4.2.2.4.6 SERVICE ACTION BIDIRECTIONAL CDB format. 93
4.2.3 Variable length CDB formats . 93
4.2.3.1 Generic variable length CDB format. 93
4.2.3.2 Typical 32-byte variable length CDB format . 95
4.2.4 Extended CDBs . 96
4.2.4.1 XCDB model. 96
4.2.4.2 The XCDB format . 96
4.2.5 Common CDB fields . 98
4.2.5.1 Operation code . 98
4.2.5.2 Service action . 98
4.2.5.3 Logical block address . 98
4.2.5.4 Transfer length . 99
4.2.5.5 Parameter list length. 99
4.2.5.6 Allocation length . 99
4.3 Data field requirements . 99
4.3.1 ASCII data field requirements. 99
4.3.2 Null data field termination and zero padding requirements . 100
4.3.3 Variable type data field requirements . 100
4.3.4 Port identifier field requirements. 100
4.4 Secure random numbers . 101
4.5 Sense data . 101
4.5.1 Sense data introduction. 101
4.5.2 Descriptor format sense data . 102
4.5.2.1 Descriptor format sense data overview . 102
4.5.2.2 Information sense data descriptor . 104
4.5.2.3 Command-specific information sense data descriptor.
...