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1、INTERNATIONAL STANDARD ISO/IEC 14776-331 First edition 2002-09 Information technology Small computer system interface (SCSI) Part 331: Stream commands (SSC) Reference number ISO/IEC 14776-331:2002(E) Copyright International Organization for Standardization Provided by IHS under license with ISO Lice
2、nsee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/03/2007 23:43:15 MDTNo reproduction or networking permitted without license from IHS -,-,- Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing,
3、 Bernie Not for Resale, 04/03/2007 23:43:15 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD ISO/IEC 14776-331 First edition 2002-09 Information technology Small computer system interface (SCSI) Part 331: Stream commands (SSC) PRICE CODE ISO/IEC 2002 A
4、ll rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. ISO/IEC Copyright Office Case postale 56 CH-1211 Ge
5、nve 20 Switzerland For price, see current catalogue X Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/03/2007 23:43:15 MDTNo reproduction or networking permitted without license fr
6、om IHS -,-,- 2 14776-331 ISO/IEC:2002(E) CONTENTS FOREWORD 6 INTRODUCTION 7 1Scope 8 2Normative references. 9 3Definitions, symbols and abbreviations. 9 3.1Definitions 9 3.2Symbols and abbreviations.11 3.3Keywords.11 3.4Conventions.12 4General.13 4.1Overview .13 4.2Physical models.13 5Sequential-acc
7、ess devices 13 5.1Definitions specific to sequential access devices13 5.2Sequential-access device model 16 5.2.1Physical elements 16 5.2.2Early warning .19 5.2.3Partitions within a volume.19 5.2.4Logical elements within a partition21 5.2.5Data buffering 22 5.2.6Tagged command queuing .22 5.2.7Record
8、ed object descriptors (block identifiers)23 5.2.8Direction and position definitions 23 5.2.9Write protection .25 5.2.10 Progress indication.27 5.2.11 TapeAlert application client interface 28 5.2.12 Device reservations and command behavior.31 5.3Command descriptions for sequential-access devices 32
9、5.3.1ERASE command.34 5.3.2FORMAT MEDIUM command.34 5.3.3LOAD UNLOAD command36 5.3.4LOCATE command 38 5.3.5READ command.39 5.3.6READ BLOCK LIMITS command 41 5.3.7READ POSITION command .42 5.3.8READ REVERSE command45 5.3.9RECOVER BUFFERED DATA command 46 5.3.10 REPORT DENSITY SUPPORT command.47 5.3.1
10、1 REWIND command 50 5.3.12 SPACE command.51 5.3.13 VERIFY command54 5.3.14 WRITE command.55 5.3.15 WRITE FILEMARKS command.57 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/03/200
11、7 23:43:15 MDTNo reproduction or networking permitted without license from IHS -,-,- 14776-331 ISO/IEC:2002(E) 3 5.4Parameters for sequential-access devices58 5.4.1Diagnostic parameters .58 5.4.2Log parameters58 5.4.3Mode parameters.60 6Printer devices79 6.1Model for printer devices79 6.2Commands fo
12、r printer devices80 6.2.1FORMAT command81 6.2.2PRINT command82 6.2.3RECOVER BUFFERED DATA command 83 6.2.4SLEW AND PRINT command.83 6.2.5STOP PRINT command .84 6.2.6SYNCHRONIZE BUFFER command.84 6.3Parameters for printer devices .85 6.3.1Diagnostic parameters .85 6.3.2Log parameters85 6.3.3Mode para
13、meters.86 Annex A (informative) Historical density codes94 Annex B (normative) TapeAlert log page parameter codes (flags) .96 Bibliography 101 Figure 1 SCSI standards - general structure. 8 Figure 2 Typical volume layout17 Figure 3 Typical medium track layout17 Figure 4 Serpentine recording example.
14、18 Figure 5 Parallel recording example18 Figure 6 Helical scan recording example.18 Figure 7 Early-warning example19 Figure 8 Partitioning example one partition per track group 20 Figure 9 Partitioning example one partition per two track groups 20 Figure 10 Partitioning example two partitions per tr
15、ack group.20 Figure 11 SCSI printer model80 Table 1 Error conditions and sense keys.24 Table 2 Write protect ASC/ASCQ combinations 26 Table 3 Commands providing progress indication without changing ready state.27 Table 4 Commands changing ready state and providing progress indication28 Table 5 TapeA
16、lert default informational exceptions control page .29 Table 6 TapeAlert flag types .30 Table 7 TapeAlert flags minimum subset 30 Table 8 TapeAlert flag definitions31 Table 9 Streaming commands that are allowed in the presence of various reservations.32 Table 10 Commands for sequential-access device
17、s 33 Table 11 ERASE command.34 Table 12 FORMAT MEDIUM command .35 Table 13 Format field definition.36 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/03/2007 23:43:15 MDTNo reprodu
18、ction or networking permitted without license from IHS -,-,- 4 14776-331 ISO/IEC:2002(E) Table 14 LOAD UNLOAD command37 Table 15 LOCATE command 38 Table 16 READ command.39 Table 17 READ BLOCK LIMITS command 41 Table 18 READ BLOCK LIMITS data.41 Table 19 READ POSITION command .42 Table 20 READ POSITI
19、ON data format, short form .43 Table 21 READ POSITION data format, long form 44 Table 22 READ REVERSE command45 Table 23 RECOVER BUFFERED DATA command 46 Table 24 REPORT DENSITY SUPPORT command.47 Table 25 Density support header 48 Table 26 Density support data block descriptor .48 Table 27 REWIND c
20、ommand 51 Table 28 SPACE command.51 Table 29 Code definition.52 Table 30 VERIFY command54 Table 31 WRITE command.55 Table 32 WRITE FILEMARKS command.57 Table 33 Diagnostic page codes .58 Table 34 Log page codes59 Table 35 Parameter codes for sequential-access device page.60 Table 36 TapeAlert log pa
21、ge.60 Table 37 Device-specific parameter61 Table 38 Buffered modes61 Table 39 Speed field definition61 Table 40 Sequential-access density codes62 Table 41 Mode page codes.63 Table 42 Data compression page64 Table 43 Possible boundaries and resulting sense keys due to data compression .65 Table 44 Co
22、mpression algorithm identifiers.67 Table 45 Device configuration page 67 Table 46 EOD defined values .69 Table 47 Medium partition page(1)71 Table 48 PSUM values .72 Table 49 Medium format recognition values 74 Table 50 Medium partition page(2-4).75 Table 51 Read-write error recovery page 76 Table 5
23、2 Informational exceptions control page.78 Table 53 TapeAlert test descriptions.78 Table 54 Commands for printer devices81 Table 55 FORMAT command82 Table 56 Format type values.82 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1
24、111111001, User=Wing, Bernie Not for Resale, 04/03/2007 23:43:15 MDTNo reproduction or networking permitted without license from IHS -,-,- 14776-331 ISO/IEC:2002(E) 5 Table 57 PRINT command82 Table 58 RECOVER BUFFERED DATA command 83 Table 59 SLEW AND PRINT command.83 Table 60 STOP PRINT command84 T
25、able 61 SYNCHRONIZE BUFFER command.85 Table 62 Diagnostic page codes .85 Table 63 Log page codes86 Table 64 Printer device-specific parameter .86 Table 65 Mode page codes.87 Table 66 Parallel printer interface .87 Table 67 Parity select codes.88 Table 68 VFU control byte 88 Table 69 Printer options8
26、9 Table 70 Font identification values89 Table 71 Slew mode codes.90 Table 72 Line slew codes .90 Table 73 Form slew codes91 Table 74 Data termination option codes 91 Table 75 Serial printer interface92 Table 76 Parity selection codes 92 Table 77 Pacing protocol codes 93 Table A.1 Historical sequenti
27、al-access density codes94 Table B.1 TapeAlert log page parameter codes.96 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/03/2007 23:43:15 MDTNo reproduction or networking permitte
28、d without license from IHS -,-,- 6 14776-331 ISO/IEC:2002(E) INFORMATION TECHNOLOGY SMALL COMPUTER SYSTEM INTERFACE (SCSI) Part 331: Stream commands (SSC) FOREWORD 1)ISO (International Organization for Standardization) and IEC (International Electrotechnical Commission) form the specialized system f
29、or worldwide standardization. National bodies that are members of ISO or IEC participate in the development of International Standards through technical committees established by the respective organization to deal with particular fields of technical activity. ISO and IEC technical committees collab
30、orate in fields of mutual interest. Other international organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the work. 2)In the field of information technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1. Draft International St
31、andards adopted by the joint technical committee are circulated to national bodies for voting. Publication as an International Standard requires approval by at least 75 % of the national bodies casting a vote. 3)Attention is drawn to the possibility that some of the elements of this International St
32、andard may be the subject of patent rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights. International Standard ISO/IEC 14776-331 was prepared by subcommittee 25: Interconnection of information technology equipment, of ISO/IEC joint technical committee 1:
33、Information technology. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/03/2007 23:43:15 MDTNo
34、reproduction or networking permitted without license from IHS -,-,- 14776-331 ISO/IEC:2002(E) 7 INTRODUCTION This standard specifies functional requirements for SCSI-3 Stream commands (SSC). SSC permits SCSI streaming devices such as tape and printer devices to attach to computers and provides the d
35、efinitions for their use. This standard specifies the external behavior of a device server that defines itself as either a Sequential-access device or a Printer device in the device type field of the INQUIRY command response data. Together, these device types are known as Stream Devices. The SSC sta
36、ndard conforms to SCSI-3 Architectural Model (ISO/IEC 14776-411:1999) standard. This standard does not contain material related to any service delivery subsystem which is used to transport the commands, command parameter data, command response data and status specified in this standard. The SCSI-3 S
37、tream Commands (SSC) standard specifies a protocol for command-level communications between an application client and a device server that has identified itself as a stream device. The SCSI-3 Stream Commands (SSC) standard encompasses the following: Clause 1 describes the scope. Clause 2 lists the n
38、ormative references. Clause 3 provides descriptions, symbols and abbreviations used in this standard. Clause 4 provides an overview of the stream device class and command set. Clause 5 specifies a model (including the TapeAlert interface definition), command set and parameters for sequential-access
39、devices. Clause 6 specifies a model, command set and parameters for printer devices. Annex A provides the density code list for sequential-access devices. Annex B provides a list of TapeAlert log page parameter codes (flags). Copyright International Organization for Standardization Provided by IHS u
40、nder license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/03/2007 23:43:15 MDTNo reproduction or networking permitted without license from IHS -,-,- 8 14776-331 ISO/IEC:2002(E) INFORMATION TECHNOLOGY SMALL COMPUTER SYSTEM INTERFACE (SCSI) Part 331: Stream commands
41、 (SSC) 1 Scope This part of ISO/IEC 14776 defines the command set extensions to facilitate operation of SCSI stream devices. This standard in conjunction with ANSI INCITS 351-2001 fully specifies the standard command set for the SCSI stream device class. The objective of this standard (SSC) is to pr
42、ovide the following: a) permit an application client to communicate over a SCSI service delivery subsystem, with a logical unit that declares itself to be a sequential access device or printer device in the device type field of the INQUIRY command response data; b) define commands unique to each typ
43、e of SCSI stream device; c) define commands to manage the operation of SCSI stream devices; and d) define the differences between the types of SCSI stream devices. Figure 1 SCSI standards General structure Figure 1 shows the general structure of SCSI standards. The figure is not intended to imply a
44、relationship such as a hierarchy, protocol stack or system architecture. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/03/2007 23:43:15 MDTNo reproduction or networking permitted
45、 without license from IHS -,-,- 14776-331 ISO/IEC:2002(E) 9 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (i
46、ncluding any amendments) applies. ISO/IEC 9316:1995, Information technology Small Computer System Interface-2 ISO/IEC 14776-321:2002, Information technology Small Computer System Interface-3 (SCSI-3) Part 321: Block commands (SBC) ANSI INCITS 351-2001, Information technology SCSI Primary Commands-2
47、(SPC-2)1 3 Definitions, symbols and abbreviations The term SCSI is used to refer to the family of standards described in this clause. The Small Computer System Interface 2 standard (ISO/IEC 9316:1995) and its architecture are referred to herein as SCSI-2. 3.1 Definitions For the purpose of this document the following definitions apply. The terms cited do not constitute a comprehensive glossary for SCSI. 3.1.1 application client object that is the source of SCSI commands (see SCSI SA