ISO/IEC 14776-262:2017

ISO/IEC 14776-262
Edition 1.0 2017-02
INTERNATIONAL
STANDARD
colour
inside
Information technology – Small Computer System Interface (SCSI) –
Part 262: SAS Protocol Layer – 2 (SPL-2)

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ISO/IEC 14776-262
Edition 1.0 2017-02
INTERNATIONAL
STANDARD
colour
inside
Information technology – Small Computer System Interface (SCSI) –

Part 262: SAS Protocol Layer – 2 (SPL-2)

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 35.200 ISBN 978-2-8322-3952-0

FOREWORD. 37
INTRODUCTION. 38
General . 38
SCSI standards family. 39
1 Scope. 40
2 Normative references. 41
3 Terms, definitions, symbols, abbreviations, keywords, and conventions. 42
3.1 Terms and definitions . 42
3.2 Symbols and abbreviations . 71
3.3 Keywords. 74
3.4 Editorial conventions . 75
3.5 UML notation conventions. 76
3.5.1 Notation conventions overview . 76
3.5.2 Constraint and note conventions . 77
3.5.3 Class diagram conventions. 77
3.5.4 Object diagram conventions . 81
3.6 State machine conventions . 83
3.6.1 State machine conventions overview. 83
3.6.2 Transitions . 84
3.6.3 Messages, requests, indications, confirmations, responses, and event notifications. 84
3.6.4 State machine counters, timers, and variables. 84
3.6.5 State machine arguments. 85
3.7 Bit and byte ordering . 85
3.8 Notation for procedures and functions. 85
4 General . 87
4.1 Architecture . 87
4.1.1 Architecture overview. 87
4.1.2 Physical links and phys. 88
4.1.3 Logical links . 93
4.1.4 Narrow ports and wide ports. 93
4.1.5 Application clients and device servers. 96
4.1.6 SAS devices. 97
4.1.7 Expander devices . 98
4.1.8 Service delivery subsystem . 99
4.1.9 Domains. 99
4.1.10 Expander device topologies. 102
4.1.10.1 Expander device topology overview. 102
4.1.10.2 Expander device topologies . 102
4.1.11 Pathways . 104
4.1.12 Connections. 104
4.1.13 Broadcasts. 106
4.2 Names and identifiers. 109
4.2.1 Names and identifiers overview. 109
4.2.2 NAA IEEE Registered format identifier . 109
4.2.3 NAA Locally Assigned format identifier. 110
4.2.4 SAS address. 111
4.2.5 Hashed SAS addresses. 111
4.2.6 Device names and expander device SAS addresses. 112
4.2.7 Device names for SATA devices with world wide names . 112
4.2.8 Port names. 113
4.2.9 Port identifiers and SAS port SAS addresses. 113
4.2.10 Phy identifiers . 114
4.3 State machines. 115
4.3.1 State machine overview. 115

– 3 – ISO/IEC 14776-262:2017 © ISO/IEC 2017
4.3.2 Transmit data path. 116
4.3.3 Receive data path. 121
4.3.4 State machines and SAS Device, SAS Port, and SAS Phy classes. 125
4.4 Events. 126
4.4.1 Reset sequences . 126
4.4.2 Hard reset . 128
4.4.2.1 Hard reset overview . 128
4.4.2.2 Additional hard reset processing by SAS ports. 128
4.4.2.3 Additional hard reset processing by expander ports . 128
4.4.3 I_T nexus loss. 128
4.4.4 Power loss expected. 129
4.5 Expander device model. 129
4.5.1 Expander device model overview . 129
4.5.2 Expander ports. 131
4.5.3 Expander connection manager (ECM). 131
4.5.4 Expander connection router (ECR). 131
4.5.5 Broadcast propagation processor (BPP) . 132
4.5.6 Expander device interfaces. 132
4.5.6.1 Expander device interface overview. 132
4.5.6.2 Expander device interfaces detail . 134
4.5.6.3 ECM interface. 135
4.5.6.4 ECR interface. 137
4.5.6.5 BPP in
...