ANSI-INCITS-306-1998-R2003.pdf
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1、ANSI INCITS 306-1998 (R2003) (formerly ANSI NCITS 306-1998) for Information Technology SCSI-3 Block Commands (SBC) Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=IHS Employees/1111111001, User=OConnor, Maurice Not for Resale, 04/29/2007 12:58:46 MDTN
2、o 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=OConnor, Maurice Not for Resale, 04/29/2007 12:58:46 MDTNo reproduction or networking permitted withou
3、t license from IHS -,-,- American National Standard for Information Technology SCSI-3 Block Commands (SBC) ANSI NCITS 306-1998 Secretariat Information Technology Industry Council Approved January 7, 1998 American National Standards Institute, Inc. Abstract This standard specifies the functional requ
4、irements for the SCSI-3 Block Command set (SBC). SBC per- mits SCSI block logical units such as flexible disks, rigid disks, optical disks, etc., to attach to computers and provides the definition for their use. Copyright American National Standards Institute Provided by IHS under license with ANSI
5、Licensee=IHS Employees/1111111001, User=OConnor, Maurice Not for Resale, 04/29/2007 12:58:46 MDTNo reproduction 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 criteri
6、a for approval have been met by the standards developer. Consensus is established when, in the judgement 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
7、necessarily unanimity. Consensus requires that all views and objections be considered, and that a concerted 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 st
8、andards or not, from manufacturing, marketing, purchasing, or using products, processes, or procedures not conforming to the standards. The American National Standards Institute does not develop standards and will in no circumstances give interpretation on any American National Standard. Moreover, n
9、o person shall have the right or authority to issue an interpretation of an American National Standard 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. CAUTI
10、ON NOTICE: This American National Standard may be revised or withdrawn at any time. The procedures 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 info
11、rmation on all standards by calling or writing the American National Standards Institute. American National Standard Published by American National Standards Institute, Inc. 11 West 42nd Street, New York, NY 10036 Copyright 1998 by Information Technology Industry Council All rights reserved. No part
12、 of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without prior written permission of the publisher. Printed in the United States of America CAUTION: The developers of this standard have requested that holders of patents that may be required for the
13、implementation of the standard disclose such patents to the publisher. However, neither 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 and following calls for the
14、identification of patents that may be required for the implementation of the standard, no such claims have been made. No further patent search is conducted by the developer or publisher in respect to any standard it pro- cesses. No representation is made or implied that licenses are not required to
15、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=OConnor, Maurice Not for Resale, 04/29/2007 12:58:46 MDTNo reproduction or networking permitted without license from IHS -,-
16、,- i Contents Page Foreword.viii Introduction.xi 1 Scope. 1 2 Normative references 3 2.1Approved references . 3 2.2References under development. 3 3 Definitions, symbols, and abbreviations 3 3.1Definitions 3 3.1.1Definitions specific to direct access devices 3 3.1.1.1block device. 3 3.1.1.2cache mem
17、ory . 3 3.1.1.3check data . 3 3.1.1.4data-in buffer 3 3.1.1.5data-out buffer . 3 3.1.1.6domain. 4 3.1.1.7exclusive-or 4 3.1.1.8extent. 4 3.1.1.9host 4 3.1.1.10logical block . 4 3.1.1.11non-volatile medium. 4 3.1.1.12notch 4 3.1.1.13redundancy group 4 3.1.1.14storage array controller 4 3.1.1.15storag
18、e array conversion layer (SACL) 4 3.1.1.16third party. 4 3.1.1.17user-accessible 4 3.1.1.18user data 4 3.1.1.19volatile medium 4 3.1.2Definitions specific to optical memory block devices and to write-once block devices 4 3.1.2.1blank 4 3.1.2.2generation 4 3.1.2.3read-only medium 4 3.1.2.4update 4 3.
19、1.2.5write-once medium 5 3.2Symbols and abbreviations 5 3.3Keywords. 5 3.3.1expected 5 3.3.2mandatory 5 3.3.3may 5 3.3.4obsolete . 5 3.3.5optional 5 3.3.6reserved. 5 3.3.7shall . 5 3.3.8should 5 3.3.9vendor-specific. 5 3.4Conventions. 5 Copyright American National Standards Institute Provided by IHS
20、 under license with ANSI Licensee=IHS Employees/1111111001, User=OConnor, Maurice Not for Resale, 04/29/2007 12:58:46 MDTNo reproduction or networking permitted without license from IHS -,-,- ii Page 4 General 6 5 SCSI block device models. 7 5.1Direct-access device type model 7 5.1.1Removable medium
21、. 7 5.1.1.1Removable medium with an attached medium changer 7 5.1.2Logical blocks 8 5.1.3Ready state 8 5.1.4Power conditions . 8 5.1.5Initialization 10 5.1.6Medium defects . 11 5.1.7Cache memory 11 5.1.8Reservations 12 5.1.9Seek(10) 13 5.1.10Notched devices 14 5.1.11Rotational position locking. 14 5
22、.1.12Relative addressing. 14 5.1.13Error reporting 14 5.1.14Examples. 15 5.1.14.1Rotating media. 15 5.1.14.2Sequential media. 15 5.1.14.3Memory media. 16 5.1.15Model for XOR commands 16 5.1.15.1Storage array controller supervised XOR operations 16 5.1.15.1.1Update write operation. 16 5.1.15.1.2Regen
23、erate operation 17 5.1.15.1.3Rebuild operation. 17 5.1.15.2Third party XOR operations. 17 5.1.15.2.1Update write operation. 18 5.1.15.2.2Regenerate operation 18 5.1.15.2.3Rebuild operation. 18 5.1.15.3Hybrid subsystem XOR operations 19 5.1.15.3.1Update write operation. 19 5.1.15.3.2Regenerate operat
24、ion 19 5.1.15.3.3Rebuild operation. 20 5.1.15.4Additional array subsystem considerations . 21 5.1.15.4.1Buffer full status handling 21 5.1.15.4.2Access to an inconsistent stripe 21 5.1.15.4.3Error handling considerations 22 5.1.15.4.3.1Errors during third party XOR operations 22 5.1.15.4.3.1.1 Prima
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