ANSI INCITS335-2000 Information technology - Small Computer System Interface (SCSI-3) Stream Commands (SSC)《信息技术.SCSI流命令-2(SSC)》.pdf

1、ANSI INCITS 335-2000(formerly ANSI NCITS 335-2000)for Information Technology SCSI-3 Stream Commands (SSC)Copyright American National Standards Institute Provided by IHS under license with ANSI Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-Copyright American Natio

2、nal Standards Institute Provided by IHS under license with ANSI Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ANSINCITS 335-2000American National Standardfor Information Technology SCSI-3 Stream Commands (SSC)SecretariatInformation Technology Industry CouncilAppr

3、oved April 25, 2000 American National Standards Institute, Inc.AbstractThis standard specifies functional requirements for SCSI-3 Stream Commands (SSC). SSC permits SCSIstreaming devices such as tape and printer devices to attach to computers and provides the definitions fortheir use.This standard d

4、oes not contain material related to any service delivery subsystem that is used to transportthe commands, command parameter data, command response data, and status specified in this standard.Copyright American National Standards Institute Provided by IHS under license with ANSI Not for ResaleNo repr

5、oduction or networking permitted without license from IHS-,-,-Approval of an American National Standard requires review by ANSI that therequirements for due process, consensus, and other criteria for approval havebeen met by the standards developer.Consensus is established when, in the judgement of

6、the ANSI Board ofStandards Review, substantial agreement has been reached by directly andmaterially affected interests. Substantial agreement means much more thana simple majority, but not necessarily unanimity. Consensus requires that allviews and objections be considered, and that a concerted effo

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8、 to the standards.The American National Standards Institute does not develop standards andwill in no circumstances give an interpretation of any American NationalStandard. Moreover, no person shall have the right or authority to issue aninterpretation of an American National Standard in the name of

9、the AmericanNational Standards Institute. Requests for interpretations should beaddressed to the secretariat or sponsor whose name appears on the titlepage of this standard.CAUTION NOTICE: This American National Standard may be revised orwithdrawn at any time. The procedures of the American National

10、 StandardsInstitute require that action be taken periodically to reaffirm, revise, orwithdraw this standard. Purchasers of American National Standards mayreceive current information on all standards by calling or writing the AmericanNational Standards Institute.American National StandardPublished by

11、American National Standards Institute, Inc.11 West 42nd Street, New York, NY 10036Copyright 2000 by Information Technology Industry Council (ITI)All rights reserved.No part of this publication may be reproduced in anyform, in an electronic retrieval system or otherwise,without prior written permissi

12、on of ITI, 1250 Eye Street NW, Washington, DC 20005. Printed in the United States of AmericaCAUTION: The developers of this standard have requested that holders of patents that may berequired for the implementation of the standard disclose such patents to the publisher. However,neither the developer

13、s nor the publisher have undertaken a patent search in order to identifywhich, if any, patents may apply to this standard. As of the date of publication of this standardand following calls for the identification of patents that may be required for the implementation ofthe standard, no such claims ha

14、ve been made. No further patent search is conducted by the de-veloper or publisher in respect to any standard it processes. No representation is made or impliedthat licenses are not required to avoid infringement in the use of this standard.Copyright American National Standards Institute Provided by

15、 IHS under license with ANSI Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-iContentsPageForeword1 Scope. 12 References. 32.1 Normative References . 32.1.1 Approved references 32.1.2 References under development. 32.2 Informative references . 33 Definitions, symbo

16、ls and abbreviations 33.1 Definitions 43.2 Symbols and abbreviations 53.3 Keywords . 53.4 Conventions. 64 General 74.1 Overview 74.2 Physical models. 75 Sequential-access devices 85.1 Definitions specific to sequential access devices 85.2 Sequential-access device model . 95.2.1 Physical elements 95.

17、2.2 Early Warning 115.2.3 Partitions within a volume 125.2.4 Logical elements within a partition. 135.2.5 Data buffering 145.2.6 Tagged command queuing 155.2.7 Recorded object descriptors (block identifiers) 155.2.8 Direction and position definitions . 165.2.8.1 Error reporting 165.2.9 Write protect

18、ion 185.2.9.1 Write protect additional sense code and additional sense code qualifier use 185.2.9.2 Software Write Protect for the device server . 195.2.9.3 Associated Write Protect 195.2.9.4 Persistent Write Protect . 195.2.9.5 Permanent Write Protect 195.2.10 Progress indication 205.2.11 TapeAlert

19、 application client interface. 205.2.11.1 TapeAlert informational exceptions control page implementation . 215.2.11.2 TapeAlert log sense format 215.2.11.3 Tape drive/autoloader flag definitions 225.2.12 Device reservations and command behavior. 235.3 Command descriptions for sequential-access devic

20、es 255.3.1 ERASE command 275.3.2 FORMAT MEDIUM command . 275.3.3 LOAD UNLOAD command 295.3.4 LOCATE command 305.3.5 READ command 32Copyright American National Standards Institute Provided by IHS under license with ANSI Not for ResaleNo reproduction or networking permitted without license from IHS-,-

21、,-iiPage5.3.6 READ BLOCK LIMITS command 345.3.7 READ POSITION command 345.3.8 READ REVERSE command 385.3.9 RECOVER BUFFERED DATA command . 395.3.10 REPORT DENSITY SUPPORT Command . 405.3.11 REWIND command . 435.3.12 SPACE command 445.3.13 VERIFY command . 475.3.14 WRITE command 485.3.15 WRITE FILEMA

22、RKS command . 505.4 Parameters for sequential-access devices 515.4.1 Diagnostic parameters. 515.4.2 Log parameters 515.4.2.1 Sequential-access device page . 525.4.2.2 TapeAlert log page 535.4.3 Mode parameters. 535.4.3.1 Data compression page. 565.4.3.2 Device configuration page . 595.4.3.3 Medium p

23、artition page(1). 635.4.3.4 Medium partition page(2-4) 675.4.3.5 Read-write error recovery page . 695.4.3.6 Informational exceptions control page . 706 Printer devices . 726.1 Model for printer devices . 726.2 Commands for printer devices. 726.2.1 FORMAT command. 736.2.2 PRINT command . 746.2.3 RECO

24、VER BUFFERED DATA command . 756.2.4 SLEW AND PRINT command . 756.2.5 STOP PRINT command 766.2.6 SYNCHRONIZE BUFFER command 766.3 Parameters for printer devices. 776.3.1 Diagnostic parameters. 776.3.2 Log parameters 776.3.3 Mode parameters. 786.3.3.1 Parallel printer interface page 796.3.3.2 Printer

25、options page. 806.3.3.3 Serial printer interface page. 84AnnexesA 87B 89Tables1 Error conditions and sense keys 172 Write protect ASC/ASCQ combinations . 193 Commands providing progress indication without changing ready state 204 Commands changing ready state and providing progress indication. 20Cop

26、yright American National Standards Institute Provided by IHS under license with ANSI Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-iiiPage5 TapeAlert default informational exceptions control page 216 TapeAlert flag types 227 TapeAlert flags minimum subset 228 Tap

27、eAlert flag definitions 239 Streaming commands that are allowed in the presence of various reservations 2410 Commands for sequential-access devices . 2611 ERASE command. 2712 FORMAT MEDIUM command 2813 Format field definition . 2814 LOAD UNLOAD command . 2915 LOCATE command. 3116 READ command . 3217

28、 READ BLOCK LIMITS command . 3418 READ BLOCK LIMITS data 3419 READ POSITION command. 3520 READ POSITION data format, short form 3621 READ POSITION data format, long form . 3722 READ REVERSE command. 3823 RECOVER BUFFERED DATA command 3924 REPORT DENSITY SUPPORT command . 4025 Density support header.

29、 4126 Density support data block descriptor. 4127 REWIND command 4428 SPACE command. 4429 Code definition 4530 VERIFY command 4731 WRITE command . 4832 WRITE FILEMARKS command 5033 Diagnostic page codes . 5134 Log page codes 5235 Parameter codes for sequential-access device page . 5236 TapeAlert log

30、 page . 5337 Device-specific parameter 5338 Buffered modes 54Copyright American National Standards Institute Provided by IHS under license with ANSI Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ivPage39 Speed field definition 5440 Sequential-access density codes

31、 . 5541 Mode page codes. 5642 Data compression page . 5643 Possible boundaries and resulting sense keys due to data compression . 5744 Compression algorithm identifiers 5945 Device configuration page 6046 EOD defined values . 6247 Medium partition page(1) . 6448 PSUM values 6549 Medium format recogn

32、ition values . 6650 Medium partition page(2-4) 6751 Read-write error recovery page 6952 Informational exceptions control page 7053 TapeAlert test descriptions. 7154 Commands for printer devices . 7355 FORMAT command . 7456 Format type values. 7457 PRINT command 7458 RECOVER BUFFERED DATA command 755

33、9 SLEW AND PRINT command 7560 STOP PRINT command . 7661 SYNCHRONIZE BUFFER command . 7762 Diagnostic page codes . 7763 Log page codes 7864 Printer device-specific parameter. 7865 Mode page codes. 7966 Parallel printer interface . 7967 Parity select codes . 7968 VFU control byte. 8069 Printer options

34、 8170 Font identification values 8171 Slew mode codes . 8272 Line slew codes 83Copyright American National Standards Institute Provided by IHS under license with ANSI Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-vPage73 Form slew codes. 8374 Data termination opt

35、ion codes 8475 Serial printer interface. 8476 Parity selection codes. 8577 Pacing protocol codes 8578 Historical sequential-access density codes 8779 TapeAlert log page parameter codes . 89Figures1 SCSI standards - general structure 12 Typical volume layout . 103 Typical medium track layout . 104 Se

36、rpentine recording example 115 Parallel recording example . 116 Helical scan recording example 117 Early-warning example . 128 Partitioning example - one partition per track group . 129 Partitioning example - one partition per two track groups. 1310 Partitioning example - two partitions per track gr

37、oup 1311 SCSI printer model . 72Copyright American National Standards Institute Provided by IHS under license with ANSI Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-viForeword (This foreword is not part of American National Standard NCITS 335-2000.)The SCSI-3 St

38、ream Commands (SSC) standard specifies the external behavior of adevice server that defines itself as either a Sequential-access device or a Printer de-vice in the device type field of the INQUIRY command response data. Together,these device types are known as Stream Devices. The SSC standard confor

39、ms toSCSI-3 Architectural Model (ANSI X3.270-1996) standard.Requests for interpretation, suggestions for improvement and addenda, or defect re-ports are welcome. They should be sent to the NCITS Secretariat, Information Tech-nology Industry Council, 1250 Eye Street NW, Suite 200, Washington, DC 2000

40、5-3922.This standard was processed and approved for submittal to ANSI by National Com-mittee for Information Technology Standardization (NCITS). Committee approval ofthis standard does not necessary imply that all committee members voted for approv-al. At the time it approved this standard, NCITS ha

41、d the following members:Karen Higginbottom, ChairDavid Michael, Vice-ChairMonica Vago, SecretaryOrganization Represented Name of RepresentativeAonix Alexander NawrockiApple Computer, Inc. David MichaelBull HN Information Systems, Inc. Randall KilmartinCompaq Computer Corporation . Scott JamesonHewle

42、tt-Packard Company. Karen HigginbottomHitachi American, Ltd. John NeumannIBM Corporation . Ronald F. SillettiInstitute for Certification of Computer Professionals Kenneth M. ZemrowskiLucent Technologies, Inc. Herbert BertineMicrosoft Corporation . Mark RylandNational Institute of Standards b) define

43、 commands unique to each type of SCSI stream device;c) define commands to manage the operation of SCSI stream devices; andd) define the differences between the types of SCSI stream devices.Figure 1 SCSI standards - General structureFigure 1 shows the general structure of SCSI standards. The figure i

44、s not intended to imply a relationshipsuch as a hierarchy, protocol stack, or system architecture.Copyright American National Standards Institute Provided by IHS under license with ANSI Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-BSR NCITS 3352At the time this

45、standard was generated, examples of the SCSI general structure included:Physical Interconnects:Fibre Channel Arbitrated Loop X3.272:1995Fibre Channel Arbitrated Loop 2 NCITS.332:1999Fibre Channel - Physical and Signaling Interface X3.230-1994High Performance Serial Bus IEEE 1394-1995SCSI Parallel In

46、terface 2 X3.302:1999SCSI Parallel Interface 3 T10/1302-DSerial Storage Architecture Physical Layer 1 X3.293:1996Serial Storage Architecture Physical Layer 2 NCITS.307:1998Transport Protocols:Serial Storage Architecture Transport Layer 1 X3.295:1996SCSI-3 Fibre Channel Protocol X3.269:1996SCSI Fibre

47、 Channel Protocol 2 T10/1144-DSCSI Serial Bus Protocol 2 NCITS.325:1998Serial Storage Architecture SCSI-3 Protocol NCITS.309:1998Serial Storage Architecture Transport Layer 2 NCITS.308:1998Shared Command Set:SCSI-3 Primary Commands X3.301:1997SCSI Primary Commands 2 T10/1236-DDevice-Type Specific Co

48、mmand Sets:SCSI-3 Stream Commands (this standard)SCSI-3 Block Commands NCITS.306:1998SCSI-3 Enclosure Services NCITS.305:1998SCSI-3 Medium Changer Commands NCITS.314:1998SCSI Controller Commands 2 NCITS.318:1998SCSI Multimedia Commands X3.304:1997SCSI-3 Multimedia Commands 2 T10/1228-DSCSI Multimedia Commands 3 T10/1363-DArchitecture Model:SCSI-3 Architecture Model X3.270:1996SCSI Architecture Model 2 T10/1157-DCommon Access Method:SCSI Common Access Method X3.232:1996SCSI Common Access Method 3 T10/990-DThe term SCSI is