ISO/IEC 14776-323:2017

Information technology - Small computer system interface (SCSI) - Part 323: SCSI Block Commands - 3 (SBC-3)

ISO/IEC 14776-323:2017(E) defines the model and command set extensions to be used in conjunction with the SCSI Primary Command Set standard - 4 (SPC-4) to facilitate operation of SCSI direct-access block devices (e.g. hard disk drives).

General Information

• Status: Published
• Publication Date: 24-Jan-2017
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 33.180.20 - Fibre optic interconnecting devices
• 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: 04-Jan-2017
• Completion Date: 25-Jan-2017

Standards Content (Sample)

ISO/IEC 14776-323
Edition 1.0 2017-01
INTERNATIONAL
STANDARD
colour
inside
Information technology – Small computer system interface (SCSI) –
Part 323: SCSI Block Commands – 3 (SBC-3)

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ISO/IEC 14776-323
Edition 1.0 2017-01
INTERNATIONAL
STANDARD
colour
inside
Information technology – Small computer system interface (SCSI) –

Part 323: SCSI Block Commands – 3 (SBC-3)

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 35.200 ISBN 978-2-8322-3721-2

– 2 – ISO/IEC 14776-323:2017 © ISO/IEC 2017
– 2 – ISO/IEC 14776-323:2016 © ISO/IEC 2016
FOREWORD . 5
INTRODUCTION . 7
General . 7
SCSI standards family . 7
1 Scope. 8
2 Normative references. 8
3 Terms, definitions, symbols, abbreviations, keywords, and conventions. 9
3.1 Terms and definitions . 9
3.2 Symbols. 19
3.3 Abbreviations. 19
3.4 Keywords. 20
3.5 Editorial conventions . 21
3.6 Numeric and character conventions. 22
3.6.1 Numeric conventions . 22
3.6.2 Units of measure. 22
3.7 State machine conventions . 24
4 Direct access block device type model . 25
4.1 Direct access block device type model introduction. 25
4.2 Direct access block device type model. 26
4.2.1 Direct access block device type model overview. 26
4.2.2 Logical block access command types. 26
4.2.3 Logical block access operation types . 26
4.3 Media examples . 26
4.3.1 Media examples overview. 26
4.3.2 Rotating media. 27
4.3.3 Memory media . 27
4.4 Removable media. 27
4.5 Logical Blocks. 28
4.6 Physical blocks. 29
4.7 Logical block provisioning. 33
4.7.1 Logical block provisioning overview. 33
4.7.2 Fully provisioned logical unit. 34
4.7.3 Logical block provisioning management. 34
4.7.3.1 Logical block provisioning management overview . 34
4.7.3.2 Resource provisioned logical unit. 34
4.7.3.3 Thin provisioned logical unit. 35
4.7.3.4 Unmapping LBAs . 35
4.7.3.4.1 Processing unmap requests . 35
4.7.3.4.2 Unmap operations . 35
4.7.3.4.3 WRITE SAME command and unmap operations . 36
4.7.3.5 Autonomous LBA transitions. 37
4.7.3.6 Thin provisioned logical unit resource exhaustion considerations . 37
4.7.3.7 Logical block provisioning thresholds. 37
4.7.3.7.1 Logical block provisioning thresholds overview. 37
4.7.3.7.2 Logical block provisioning armed decreasing thresholds . 38
4.7.3.7.3 Logical block provisioning armed increasing thresholds. 39
4.7.3.7.4 Logical block provisioning threshold notification.40
4.7.4 LBP (logical block provisioning) state machine. 40
4.7.4.1 LBP state machine overview. 40
4.7.4.2 LBP state machine for thin provisioned logical units supporting anchored LBAs. 41
4.7.4.3 LBP state machine for thin provisioned logical units not supporting anchored LBAs. 41
4.7.4.4 LBP state machine for resource provisioned logical units. 42
4.7.4.5 Performing read operations with respect to logical block provisioning. 42
4.7.4.6 LBP1:Mapped state. 44

ISO/IEC 14776-323:2016 © ISO/IEC 2016 – 3 –
4.7.4.6.1 LBP1:Mapped state description. 44
4.7.4.6.2 Transition LBP1:Mapped to LBP2:Deallocated . 44
4.7.4.6.3 Transition LBP1:Mapped to LBP3:Anchored. 44
4.7.4.7 LBP2:Deallocated state. 44
4.7.4.7.1 LBP2:Deallocated state description. 44
4.7.4.7.2 Transition LBP2:Deallocated to LBP1:Mapped . 44
4.7.4.7.3 Transition LBP2:Deallocated to LBP3:Anchored. 45
4.7.4.8 LBP3:Anchored state . 45
4.7.4.8.1 LBP3:Anchored state description . 45
4.7.4.8.2 Transition LBP3:Anchored to LBP1:Mapped. 45
4.7.4.8.3 Transition LBP3:Anchored to LBP2:Deallocated. 45
4.8 Data de-duplication. 45
4.9 Ready state . 45
4.10 Initialization. 46
4.11 Sanitize operations. 46
4.11.1 Sanitize operations overview . 46
4.11.2 Performing a sanitize operation . 47
4.11.3 Completing a sanitize operation. 48
4.12 Write protection . 49
4.13 Medium defects . 49
4.13.1 Medium defects overview . 49
4.13.2 Generation of defect lists . 52
4.14 Write and unmap failures. 53
4.15 Caches .
...