ANSI INCITS ISO IEC 14776-414-2009 Information technology - Small Computer System Interface (SCSI) - Part 414 SCSI Architecture Model-4 (SAM-4).pdf

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1、 INCITS/ISO/IEC 14776-414:20092010 (ISO/IEC 14776-414:2009, IDT) Information technology - Small Computer System Interface (SCSI) - Part 414: SCSI Architecture Model-4 (SAM-4) Reaffirmed as INCITS/ISO/IEC 14776-414:2009 R2015INCITS/ISO/IEC 14776-414:20092010 PDF disclaimer This PDF file may contain e

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5、nformation Technology Standards) as an American National Standard. Date of ANSI Approval: 3/11/2010 Published by American National Standards Institute, 25 West 43rd Street, New York, New York 10036 Copyright 2010 by Information Technology Industry Council (ITI). All rights reserved. These materials

6、are subject to copyright claims of International Standardization Organization (ISO), International Electrotechnical Commission (IEC), American National Standards Institute (ANSI), and Information Technology Industry Council (ITI). Not for resale. No part of this publication may be reproduced in any

7、form, including an electronic retrieval system, without the prior written permission of ITI. All requests pertaining to this standard should be submitted to ITI, 1101 K Street NW, Suite 610, Washington DC 20005. Printed in the United States of America ii ITIC 2010 All rights reserved ISO/IEC 14776-4

8、14Edition 1.0 2009-06INTERNATIONAL STANDARD Information technology Small computer system interface (SCSI) Part 414: Architecture model-4 (SAM-4) INTERNATIONAL ELECTROTECHNICAL COMMISSION XBICS 35.200 PRICE CODEISBN 2-8318-1047-9- 2 - 14776-414 ISO/IEC:2009(E)ContentsPageFOREWORD. 10INTRODUCTION. 11G

9、eneral . 11SCSI standards family. 111 Scope. 122 Normative references. 133 Terms, definitions, symbols, abbreviations, and conventions 133.1 Terms and definitions . 133.2 Acronyms 253.3 Keywords 253.4 Editorial conventions 263.5 Numeric conventions 273.6 Notation conventions 283.6.1 UML notation con

10、ventions 283.6.1.1 Notation conventions overview 283.6.1.2 Constraint and note conventions. 283.6.1.3 Class diagram conventions . 293.6.1.4 Object diagram conventions 333.6.2 Notation for procedure calls 343.6.3 Notation for state diagrams. 344 SCSI architecture model 364.1 Introduction. 364.2 Compl

11、iance Requirements . 364.3 The SCSI distributed service model . 374.4 The SCSI client-server model. 384.4.1 SCSI client-server model overview. 384.4.2 Synchronizing client and server states . 394.4.3 Request/Response ordering . 394.5 The SCSI structural model . 394.6 SCSI classes 414.6.1 SCSI classe

12、s overview . 414.6.2 SCSI Domain class. 414.6.3 Service Delivery Subsystem class 424.6.4 SCSI Device class 434.6.4.1 SCSI Device class overview 434.6.4.2 SCSI Device Name attribute . 434.6.5 SCSI Port class. 444.6.5.1 SCSI Port class overview 444.6.5.2 Relative Port Identifier attribute. 454.6.6 SCS

13、I Target Port class . 454.6.6.1 SCSI Target Port class overview. 454.6.6.2 Target Port Identifier attribute 454.6.6.3 Target Port Name attribute 454.6.7 SCSI Initiator Port class 464.6.7.1 SCSI Initiator Port class overview . 464.6.7.2 Initiator Port Identifier attribute 464.6.7.3 Initiator Port Nam

14、e attribute 464.6.8 Task Router class . 464.6.9 SCSI Initiator Device class 474.6.10 Application Client class. 474.6.11 Application Client Task Management Function class . 484.6.11.1 Application Client Task Management Function class overview. 484.6.11.2 Function Identifier attribute 484.6.11.3 Nexus

15、 attribute 484.6.11.4 Service Response attribute . 4814776-414 ISO/IEC:2009(E) - 3 -4.6.11.5 Additional Response Information attribute 484.6.12 Application Client Task Set class 484.6.13 Application Client Command class . 494.6.13.1 Application Client Command class overview. 494.6.13.2 I_T_L_Q Nexus

16、 attribute . 494.6.13.3 CDB attribute. 494.6.13.4 Task Attribute attribute 494.6.13.5 Status attribute 494.6.13.6 Service Response attribute . 494.6.13.7 Data-In Buffer attribute 494.6.13.8 Data-In Buffer Size attribute 494.6.13.9 Data-Out Buffer attribute . 494.6.13.10 Data-Out Buffer size attribut

17、e 494.6.13.11 CRN attribute. 494.6.13.12 Command Priority attribute 504.6.13.13 First Burst Enabled attribute 504.6.13.14 Sense Data attribute 504.6.13.15 Sense Data Length attribute 504.6.13.16 Status Qualifier attribute 504.6.14 SCSI Target Device class. 504.6.15 Level 1 Hierarchical Logical Unit

18、class . 514.6.16 Level 2 Hierarchical Logical Unit class . 524.6.17 Level 3 Hierarchical Logical Unit class . 524.6.18 Level 4 Hierarchical Logical Unit class . 534.6.19 Logical Unit class 534.6.19.1 Logical Unit class overview . 534.6.19.2 LUN attribute . 554.6.19.3 Logical Unit Name attribute. 554

19、.6.19.4 Dependent Logical Unit attribute. 554.6.20 Device Server class 564.6.21 Task Manager class 564.6.22 Task Set class. 564.6.23 Command class 564.6.23.1 Command class overview . 564.6.23.2 I_T_L_Q Nexus attribute . 564.6.23.3 Task Attribute attribute 564.6.23.4 CDB attribute. 574.6.23.5 CRN att

20、ribute. 574.6.23.6 Command Priority attribute 574.6.23.7 Status attribute 574.6.23.8 Sense Data attribute 574.6.23.9 Sense Data Length attribute 574.6.23.10 Service Response attribute . 574.6.23.11 Status Qualifier attribute 574.6.23.12 First Burst Enabled attribute 574.6.23.13 Device Server Buffer

21、attribute . 574.6.23.14 Application Client Buffer Offset attribute . 574.6.23.15 Request Byte Count attribute 574.6.23.16 Delivery Result attribute 584.6.24 Task Management Function class 584.6.24.1 Task Management Function class overview . 584.6.24.2 Function Identifier attribute 584.6.24.3 Nexus a

22、ttribute 584.6.24.4 Service Response attribute . 584.6.24.5 Additional Response Information attribute 584.6.25 Well Known Logical Unit class 584.7 Logical unit number (LUN) 594.7.1 Introduction . 59- 4 - 14776-414 ISO/IEC:2009(E)4.7.2 Logical unit representation format. 594.7.3 LUNs overview 594.7.4

23、 Minimum LUN addressing requirements. 594.7.5 Single level LUN structure 604.7.6 Eight byte LUN structure. 624.7.7 Peripheral device addressing method. 644.7.8 Flat space addressing method 654.7.9 Logical unit addressing method 664.7.10 Extended logical unit addressing 674.7.11 Well known logical un

24、it addressing. 704.7.12 Extended flat space addressing method. 704.7.13 Logical unit not specified addressing 714.8 Nexus . 714.8.1 Nexus overview. 714.8.2 Command identifier. 724.8.3 Nexus usage rules 724.9 SCSI ports 724.9.1 SCSI port configurations. 724.9.2 SCSI devices with multiple ports. 734.9

25、.3 Multiple port SCSI target device structure 744.9.4 Multiple port SCSI initiator device structure 754.9.5 Multiple port SCSI device structure. 764.9.6 SCSI initiator device view of a multiple port SCSI target device. 774.9.7 SCSI target device view of a multiple port SCSI initiator device. 794.10

26、The SCSI model for distributed communications . 795 SCSI command model . 845.1 The Execute Command procedure call 845.2 Command descriptor block (CDB) 855.3 Status . 865.3.1 Status codes . 865.3.2 Status qualifier 875.3.3 Status precedence 895.4 SCSI transport protocol services in support of Execute

27、 Command 905.4.1 Overview. 905.4.2 Command and status SCSI transport protocol services . 905.4.2.1 Command and status SCSI transport protocol services overview 905.4.2.2 Send SCSI Command SCSI transport protocol service request . 915.4.2.3 SCSI Command Received SCSI transport protocol service indica

28、tion . 915.4.2.4 Send Command Complete SCSI transport protocol service response . 925.4.2.5 Command Complete Received SCSI transport protocol service confirmation 925.4.3 Data transfer SCSI transport protocol services. 935.4.3.1 Introduction 935.4.3.2 Data-In delivery service. 955.4.3.2.1 Send Data-

29、In SCSI transport protocol service request 955.4.3.2.2 Data-In Delivered SCSI transport protocol service confirmation . 955.4.3.3 Data-Out delivery service 955.4.3.3.1 Receive Data-Out SCSI transport protocol service request 955.4.3.3.2 Data-Out Received SCSI transport protocol service confirmation.

30、 965.4.3.4 Terminate Data Transfer service. 965.4.3.4.1 Terminate Data Transfer SCSI transport protocol service request 965.4.3.4.2 Data Transfer Terminated SCSI transport protocol service confirmation 975.5 Command lifetimes. 975.6 Aborting commands 985.7 Command processing example 1035.8 Commands

31、that complete with CHECK CONDITION status 1035.8.1 Overview. 1035.8.2 Handling commands when ACA is not in effect 1045.8.3 Aborting commands terminated with a CHECK CONDITION status without establishing an ACA 10414776-414 ISO/IEC:2009(E) - 5 -5.9 Auto contingent allegiance (ACA). 1055.9.1 ACA overv

32、iew . 1055.9.2 Establishing an ACA . 1055.9.3 Handling new commands received on the faulted I_T nexus when ACA is in effect 1065.9.4 Handling new commands received on non-faulted I_T nexuses when ACA is in effect . 1075.9.4.1 Command processing permitted for commands received on non-faulted I_T nexu

33、ses during ACA 1075.9.4.2 Handling new commands received on non-faulted I_T nexuses when ACA is in effect 1075.9.5 Clearing an ACA condition 1085.10 Overlapped commands 1095.11 Incorrect logical unit 1095.12 Task attribute exception conditions 1095.13 Sense data . 1105.14 Unit attention condition. 1

34、106 SCSI events and event notification model . 1146.1 SCSI events overview 1146.2 Establishing a unit attention condition subsequent to detection of an event 1166.3 Conditions resulting from SCSI events. 1176.3.1 Power on. 1176.3.2 Hard reset . 1186.3.3 Logical unit reset. 1186.3.4 I_T nexus loss. 1

35、186.3.5 Power loss expected. 1196.4 Event notification SCSI transport protocol services 1197 Task management functions 1217.1 Task management function procedure calls. 1217.2 ABORT TASK. 1227.3 ABORT TASK SET. 1237.4 CLEAR ACA . 1237.5 CLEAR TASK SET . 1237.6 I_T NEXUS RESET 1247.7 LOGICAL UNIT RESE

36、T 1247.8 QUERY TASK 1247.9 QUERY TASK SET 1257.10 QUERY ASYNCHRONOUS EVENT 1257.11 Task management function lifetime 1267.12 Task management SCSI transport protocol services . 1277.12.1 Task management SCSI transport protocol services overview 1277.12.2 Send Task Management Request SCSI transport pr

37、otocol service request. 1277.12.3 Task Management Request Received SCSI transport protocol service indication. 1287.12.4 Task Management Function Executed SCSI transport protocol service response. 1287.12.5 Received Task Management Function Executed SCSI transport protocol service confirmation 1297.

38、13 Task management function example 1308 Task set management 1318.1 Introduction to task set management . 1318.2 Implicit head of queue 1318.3 Command management model 1318.4 Command management events . 1328.5 Command states 1328.5.1 Overview. 1328.5.1.1 Command state nomenclature 1328.5.1.2 Suspend

39、ed information . 1338.5.2 Enabled command state . 1338.5.3 Blocked command state 1338.5.4 Dormant command state. 1338.5.5 Completed command state. 1338.5.6 Command states and command lifetimes. 1338.6 Task attributes 134- 6 - 14776-414 ISO/IEC:2009(E)8.6.1 Overview. 1348.6.2 Commands having the SIMP

40、LE task attribute. 1348.6.3 Commands having the ORDERED task attribute. 1358.6.4 Commands having the HEAD OF QUEUE task attribute . 1358.6.5 Commands having the ACA task attribute . 1358.7 Command priority . 1358.8 Command state transitions. 1368.9 Task set management examples 1378.9.1 Introduction

41、. 1378.9.2 Commands having the HEAD OF QUEUE task attribute . 1388.9.3 Commands having the ORDERED task attribute. 1408.9.4 Commands having the ACA task attribute . 141Annex A (informative) Identifiers and names for objects. 142A.1 Identifiers and names overview 142A.2 Identifiers and names. 142Anne

42、x B (informative) SCSI Initiator Port attributes and SCSI Target Port attributes supported by SCSI transport protocols 147Annex C (informative) Terminology mapping to SAM-3 149Annex D (informative) SCSI transport protocol acronyms 150Bibliography 15114776-414 ISO/IEC:2009(E) - 7 -Table 1 Numbering c

43、onventions. 28Table 2 Constraint and note notation . 28Table 3 Class diagram notation for classes 29Table 4 Multiplicity notation 30Table 5 Class diagram notation for associations 30Table 6 Class diagram notation for aggregations. 31Table 7 Class diagram notation for generalizations . 32Table 8 Clas

44、s diagram notation for dependency 32Table 9 Object diagram notation for objects. 33Table 10 Object diagram notation for link. 33Table 11 Single level LUN structure using peripheral device addressing method . 60Table 12 Single level LUN structure using flat space addressing method . 60Table 13 Single

45、 level LUN structure using extended flat space addressing method 61Table 14 Eight byte LUN structure adjustments. 62Table 15 Eight byte LUN structure . 63Table 16 Format of addressing fields . 63Table 17 ADDRESS METHOD field 64Table 18 Peripheral device addressing format. 64Table 19 Flat space addre

46、ssing format 66Table 20 Logical unit addressing format. 66Table 21 Extended logical unit addressing format 68Table 22 LENGTH field and related sizes . 68Table 23 Two byte extended logical unit addressing format 68Table 24 Four byte extended logical unit addressing format 69Table 25 Six byte extended

47、 logical unit addressing format 69Table 26 Eight byte extended logical unit addressing format. 69Table 27 Logical unit extended addressing 70Table 28 Well known logical unit extended addressing format.70Table 29 Extended flat space addressing format . 71Table 30 Logical unit not specified extended a

48、ddressing format71Table 31 Nexus 72Table 32 CONTROL byte. 86Table 33 Status codes 86Table 34 Status qualifier format 87Table 35 SCOPE field. 88Table 36 QUALIFIER field 89Table 37 SCSI device conditions that abort commands in a SCSI initiator device. 98Table 38 SCSI device conditions that abort comma

49、nds in a SCSI target device. 99Table 39 Task management functions that abort commands. 100Table 40 Command related conditions that abort commands 101Table 41 Command handling when ACA is not in effect 104Table 42 Aborting commands when an ACA is not established. 104Table 43 Blocking and aborting commands when an ACA is established 106Table 44 Handling for new commands received on a faulted I_T ne