ANSI INCITS431-2007 Information technology - SCSI ATA Translation (SAT)《信息技术.SCSI ATA译文(SAT)》.pdf
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1、American National StandardDeveloped byfor Information Technology SCSI/ATA Translation(SAT)ANSI INCITS 431-2007ANSIINCITS431-2007Copyright American National Standards Institute Provided by IHS under license with ANSI Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-C
2、opyright American National Standards Institute Provided by IHS under license with ANSI Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ANSIINCITS 431-2007American National Standardfor Information Technology SCSI/ATA Translation(SAT)SecretariatInformation Technology
3、 Industry CouncilApproved August 9, 2007 American National Standards Institute, Inc.AbstractThis standard specifies a translation layer between SCSI and ATA protocols. This translation layer is used by storage controllers to emulate objects in a SCSI logical unit using an ATA device, providing capab
4、ilities defined by SCSI standards (e.g., the SCSI Block Commands (SBC-2) and SCSI Primary Commands (SPC-3) standards). For the purposes of this standard, ATA device capabilities are defined by ATA8-AAM, ATA8-ACS, ATA8-APT, and SATA 2.5.Copyright American National Standards Institute Provided by IHS
5、under license with ANSI Not for ResaleNo reproduction 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.Consen
6、sus is established when, in the judgement of 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 object
7、ions be considered, and that a concerted effort be madetowards their resolution.The use of American National Standards is completely voluntary; theirexistence does not in any respect preclude anyone, whether he has approvedthe standards or not, from manufacturing, marketing, purchasing, or usingprod
8、ucts, processes, or procedures not conforming 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
9、an American National Standard in the name of 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
10、time. The procedures of the American National 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 Ins
11、titute.American National StandardPublished byAmerican National Standards Institute, Inc.25 West 43rd Street, New York, NY 10036Copyright 2007 by Information Technology Industry Council (ITI)All rights reserved.No part of this publication may be reproduced in anyform, in an electronic retrieval syste
12、m or otherwise,without prior written permission 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 be re-quired for the implementation of the standard disclose such patents
13、to the publisher. However, nei-ther the developers nor the publisher have undertaken a patent search in order to identify which, ifany, patents may apply to this standard. As of the date of publication of this standard, followingcalls for the identification of patents that may be required for the im
14、plementation of the standard,notice of one or more such claims has been received. By publication of this standard, no positionis taken with respect to the validity of this claim or of any rights in connection therewith. The knownpatent holder(s) has (have), however, filed a statement of willingness
15、to grant a license underthese rights on reasonable and nondiscriminatory terms and conditions to applicants desiring to ob-tain such a license. Details may be obtained from the publisher. No further patent search is con-ducted by the developer or publisher in respect to any standard it processes. No
16、 representation ismade or implied that this is the only license that may be required to avoid infringement in the use ofthis standard.Copyright American National Standards Institute Provided by IHS under license with ANSI Not for ResaleNo reproduction or networking permitted without license from IHS
17、-,-,-Copyright American National Standards Institute Provided by IHS under license with ANSI Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ContentsPageForeword xIntroducttion xiv1 Scope 12 References 42.1 Normative references 42.2 Approved references . 42.3 Refer
18、ences under development 42.4 Other references . 43 Definitions, symbols, abbreviations, and conventions 53.1 Definitions 53.2 Symbols and abbreviations . 103.3 Keywords 113.4 SAT specific terminology 123.5 Conventions 123.5.1 Overview . 123.5.2 Numeric conventions 123.5.3 Bit and byte ordering . 133
19、.5.4 Notation for byte encoded character strings . 143.5.5 Use of and/or 153.5.6 Notation for command descriptions 153.5.6.1 Description 153.5.7 Use of field names defined in ATA standards and specifications . 154 General . 175 SCSI architectural elements . 185.1 Overview . 185.2 Unit attention cond
20、ition . 195.3 Handling errors in ATA commands . 205.4 ATA nexus loss . 205.5 ATA hardware and software reset processing 206 Task management model . 226.1 Overview . 226.2 Queued commands . 236.2.1 Comparison of SCSI and ATA queuing 236.2.2 Mapping of SCSI queued commands to ATA queued commands 246.2
21、.3 Commands the SATL queues internally . 246.2.4 Command queuing with multiple I_T nexuses 24i6.2.5 Collateral abort with queued commands . 256.3 Task management functions . 25Copyright American National Standards Institute Provided by IHS under license with ANSI Not for ResaleNo reproduction or net
22、working permitted without license from IHS-,-,-Page6.3.1 Task management functions overview . 256.3.2 Aborting ATA queued commands . 256.3.3 Aborting ATA non-queued commands 266.3.4 ABORT TASK . 266.3.5 ABORT TASK SET . 266.3.6 CLEAR ACA . 276.3.7 CLEAR TASK SET . 276.3.8 LOGICAL UNIT RESET 286.3.9
23、QUERY TASK . 286.3.10 Obsolete reset task management functions . 286.4 Control Byte 286.4.1 CONTROL byte overview . 286.5 I_T nexus loss . 297 Summary of SCSI / ATA command mappings 307.1 Translated and emulated commands . 308 SCSI Primary Commands (SPC) mapping . 328.1 INQUIRY command 328.1.1 INQUI
24、RY command overview . 328.1.2 Standard INQUIRY data . 338.2 LOG SENSE command 358.2.1 LOG SENSE command overview . 358.2.2 PC (page control) field . 368.2.3 PAGE CODE field 368.3 MODE SELECT (6) command 378.3.1 MODE SELECT (6) command overview . 378.3.2 MODE SELECT (6) CDB fields . 378.4 MODE SELECT
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