ANSI-INCITS-431-2007.pdf
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1、American National Standard Developed by for Information Technology SCSI/ATA Translation (SAT) ANSI INCITS 431-2007 ANSI INCITS 431-2007 Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 10/05/2
2、007 02:54:32 MDTNo reproduction or networking permitted without license from IHS -,-,- Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 10/05/2007 02:54:32 MDTNo reproduction or networking per
3、mitted without license from IHS -,-,- ANSI INCITS 431-2007 American National Standard for Information Technology SCSI/ATA Translation (SAT) Secretariat Information Technology Industry Council Approved August 9, 2007 American National Standards Institute, Inc. Abstract This standard specifies a trans
4、lation 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 capabilities defined by SCSI standards (e.g., the SCSI Block Commands (SBC-2) and SCSI Primary Commands (SPC-3) standards). For
5、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 under license with ANSI Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 10/05/2007 02:54:32 MDTNo rep
6、roduction or networking permitted without license from IHS -,-,- Approval of an American National Standard requires review by ANSI that the requirements for due process, consensus, and other criteria for approval have been met by the standards developer. Consensus is established when, in the judgeme
7、nt of the ANSI Board of Standards Review, substantial agreement has been reached by directly and materially affected interests. Substantial agreement means much more than a simple majority, but not necessarily unanimity. Consensus requires that all views and objections be considered, and that a conc
8、erted effort be made towards their resolution. The use of American National Standards is completely voluntary; their existence does not in any respect preclude anyone, whether he has approved the standards or not, from manufacturing, marketing, purchasing, or using products, processes, or procedures
9、 not conforming to the standards. The American National Standards Institute does not develop standards and will in no circumstances give an interpretation of any American National Standard. Moreover, no person shall have the right or authority to issue an interpretation of an American National Stand
10、ard in the name of the American National Standards Institute. Requests for interpretations should be addressed to the secretariat or sponsor whose name appears on the title page of this standard. CAUTION NOTICE: This American National Standard may be revised or withdrawn at any time. The procedures
11、of the American National Standards Institute require that action be taken periodically to reaffirm, revise, or withdraw this standard. Purchasers of American National Standards may receive current information on all standards by calling or writing the American National Standards Institute. American
12、National Standard Published by American National Standards Institute, Inc. 25 West 43rd Street, New York, NY 10036 Copyright 2007 by Information Technology Industry Council (ITI) All rights reserved. No part of this publication may be reproduced in any form, in an electronic retrieval system or othe
13、rwise, without prior written permission of ITI, 1250 Eye Street NW, Washington, DC 20005. Printed in the United States of America CAUTION: 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 to the
14、 publisher. However, nei- ther the developers nor the publisher have undertaken a patent search in order to identify which, if any, patents may apply to this standard. As of the date of publication of this standard, following calls for the identification of patents that may be required for the imple
15、mentation of the standard, notice of one or more such claims has been received. By publication of this standard, no position is taken with respect to the validity of this claim or of any rights in connection therewith. The known patent holder(s) has (have), however, filed a statement of willingness
16、to grant a license under these 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.
17、 No representation is made or implied that this is the only license that may be required to avoid infringement in the use of this standard. Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 10/
18、05/2007 02:54:32 MDTNo reproduction or networking permitted without license from IHS -,-,- i Contents Page Foreword x Introducttion xiv 1 Scope 1 2 References 4 2.1 Normative references 4 2.2 Approved references . 4 2.3 References under development 4 2.4 Other references . 4 3 Definitions, symbols,
19、abbreviations, and conventions 5 3.1 Definitions 5 3.2 Symbols and abbreviations . 10 3.3 Keywords 11 3.4 SAT specific terminology 12 3.5 Conventions 12 3.5.1 Overview . 12 3.5.2 Numeric conventions 12 3.5.3 Bit and byte ordering . 13 3.5.4 Notation for byte encoded character strings . 14 3.5.5 Use
20、of and/or 15 3.5.6 Notation for command descriptions 15 3.5.6.1 Description 15 3.5.7 Use of field names defined in ATA standards and specifications . 15 4 General . 17 5 SCSI architectural elements . 18 5.1 Overview . 18 5.2 Unit attention condition . 19 5.3 Handling errors in ATA commands . 20 5.4
21、ATA nexus loss . 20 5.5 ATA hardware and software reset processing 20 6 Task management model . 22 6.1 Overview . 22 6.2 Queued commands . 23 6.2.1 Comparison of SCSI and ATA queuing 23 6.2.2 Mapping of SCSI queued commands to ATA queued commands 24 6.2.3 Commands the SATL queues internally . 24 6.2
22、.4 Command queuing with multiple I_T nexuses 24 6.2.5 Collateral abort with queued commands . 25 6.3 Task management functions . 25 Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 10/05/2007
23、02:54:32 MDTNo reproduction or networking permitted without license from IHS -,-,- ii Page 6.3.1 Task management functions overview . 25 6.3.2 Aborting ATA queued commands . 25 6.3.3 Aborting ATA non-queued commands 26 6.3.4 ABORT TASK . 26 6.3.5 ABORT TASK SET . 26 6.3.6 CLEAR ACA . 27 6.3.7 CLEAR
24、TASK SET . 27 6.3.8 LOGICAL UNIT RESET 28 6.3.9 QUERY TASK . 28 6.3.10 Obsolete reset task management functions . 28 6.4 Control Byte 28 6.4.1 CONTROL byte overview . 28 6.5 I_T nexus loss . 29 7 Summary of SCSI / ATA command mappings 30 7.1 Translated and emulated commands . 30 8 SCSI Primary Comma
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