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T10
dpANS NCITS 306-199X Project 996D
Revision 8c
13 November 1997
Information Technology -
SCSI-3 Block Commands (SBC)
Notice:
This is a draft proposed standard for an American National Standard of T10, a Technical
Committee of Accredited Standards Committee NCITS. As such, this is not a completed
standard. The T10 Technical Committee may modify this document as a result of comments
received during its processing and its approval as a standard.
Permission is granted to members of NCITS, its technical committees, and their associated task
groups to reproduce this document for the purposes of NCITS standardization activities without
further permission, provided this notice is included. All other rights are reserved. Any commercial
or for-profit duplication is strictly prohibited.
T10 Technical Editor: Gene Milligan
Seagate Technology Inc. OKM151
P.O. Box 12313
Oklahoma City, OK 73157-2313
USA
Tel: (405) 324-3070
Fax: (405) 324-3794
Email: gene_milligan@notes.seagate.com
Reference number
ISO/IEC ***** : 199x
ANSI NCITS 306 - 199x
Printed November, 13, 1997 12:11PM
Other Points of Contact:
T10 Chair
John B. Lohmeyer
Symbios Logic, Inc.
4420 Arrows West Drive
Colorado Springs, CO 80907-3444
Telephone: (719) 533-7560
Facsimile: (719) 533-7036
Email: john.lohmeyer@symbios.com
NCITS Secretariat
1250 Eye Street, NW Suite 200
Washington, DC 20005
SCSI Reflector
Internet address for subscription to the SCSI reflector:
Internet address for distribution via SCSI reflector:
SCSI Bulletin Board
(719) 533-7950
T10 WWW page
http://www.symbios.com/x3t10
T10 ftp
ftp.symbios.com
in the /pub/standards/io/x3t10/drafts/* directories
Document Distribution
Global Engineering
15 Inverness Way East
Englewood, CO 80112-5704
T10 Vice-Chair
Lawrence J. Lamers
Adaptec
691 South Milpitas Blvd.
Milpitas, CA 95035
Telephone: (408) 957-7817
Facsimile: (408) 957-7193
Email: ljlamers@aol.com
Telephone: (202) 737-8888
Facsimile: (202) 638-4922
majordomo@symbios.com
scsi@symbios.com
Telephone: (303) 792-2181 or
(800) 854-7179
Facsimile: (303) 792-2192
ANSI
®
NCITS 306-199x
American National Standard
for Information Technology-
SCSI-3 Block Commands (SBC)
Secretariat
Information Technology Industry Council
Approved mm dd yy
American National Standards Institute, Inc.
Abstract
This standard specifies the functional requirements for the SCSI-3 Block Command set (SBC).
SBC permits SCSI block logical units such as flexible disks, rigid disks, optical disks, etc., to
attach to computers and provides the definition for their use.
dpANS SCSI-3 Block Commands (SBC)ii
American
National
Standard
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 judgment 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 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 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, no 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.
CAUTION 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 information on all standards by calling or writing the American
National Standards Institute.
CAUTION: The developers of this standard have requested that holders of
patents that may be required for the 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
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 the publisher in respect to any standard it
processes. No representation is made or implied that licenses are not
required to avoid infringement in the use of this standard.
Published by
American National Standards Institute
11 W. 42nd Street, New York, New York 10036
Copyright 199n by American National Standards Institute
All rights reserved.
dpANS SCSI-3 Block Commands (SBC) iii
Contents
FOREWORD ..........................................................................................................................................ix
INTRODUCTION..................................................................................................................................xiii
1 Scope...................................................................................................................................................1
2 Normative References..........................................................................................................................2
2.1 Approved references......................................................................................................................3
2.2 References under development......................................................................................................3
3 Definitions, symbols, and abbreviations ................................................................................................3
3.1 Definitions......................................................................................................................................3
3.1.1 Definitions specific to direct access devices............................................................................................ 3
3.1.1.1 block device .................................................................................................................................... 3
3.1.1.2 cache memory: ............................................................................................................................... 3
3.1.1.3 check data ..................................................................................................................................... 3
3.1.1.4 data-in buffer................................................................................................................................... 3
3.1.1.5 data-out buffer................................................................................................................................. 3
3.1.1.6 domain............................................................................................................................................ 3
3.1.1.7 exclusive-or:.................................................................................................................................... 3
3.1.1.8 extent.............................................................................................................................................. 4
3.1.1.9 host................................................................................................................................................. 4
3.1.1.10 logical block .................................................................................................................................. 4
3.1.1.11 non-volatile medium...................................................................................................................... 4
3.1.1.12 notch............................................................................................................................................. 4
3.1.1.13 redundancy group ......................................................................................................................... 4
3.1.1.14 storage array controller.................................................................................................................. 4
3.1.1.15 storage array conversion layer (SACL) .......................................................................................... 4
3.1.1.16 third party...................................................................................................................................... 4
3.1.1.17 user-accessible ............................................................................................................................. 4
3.1.1.18 user data....................................................................................................................................... 4
3.1.1.19 volatile medium............................................................................................................................. 4
3.1.2 Definitions specific to optical memory block devices and to write-once block devices.............................. 4
3.1.2.1 blank............................................................................................................................................... 4
3.1.2.2 generation....................................................................................................................................... 5
3.1.2.3 read-only medium ........................................................................................................................... 5
3.1.2.4 update............................................................................................................................................. 5
3.1.2.5 write-once medium.......................................................................................................................... 5
3.2 Symbols and abbreviations ............................................................................................................5
3.3 Keywords .......................................................................................................................................5
3.3.1 expected ................................................................................................................................................ 5
3.3.2 mandatory ............................................................................................................................................. 5
3.3.3 may ....................................................................................................................................................... 5
3.3.4 obsolete................................................................................................................................................. 5
3.3.5 optional.................................................................................................................................................. 5
3.3.6 reserved................................................................................................................................................. 5
3.3.7 shall....................................................................................................................................................... 6
3.3.8 should.................................................................................................................................................... 6
3.3.9 vendor-specific....................................................................................................................................... 6
3.4 Conventions...................................................................................................................................6
4 General ................................................................................................................................................6
5 SCSI block device models....................................................................................................................7
5.1 Direct-access device type model...................................................................................................7
5.1.1 Removable medium............................................................................................................................... 7
5.1.1.1 Removable medium with an attached medium changer ................................................................... 8
5.1.2 Logical blocks........................................................................................................................................ 8
5.1.3 Ready state............................................................................................................................................ 8
5.1.4 Power conditions.................................................................................................................................... 8
5.1.5 Initialization.......................................................................................................................................... 11
5.1.6 Medium defects.................................................................................................................................... 11
5.1.7 Cache memory .................................................................................................................................... 12
5.1.8 Reservations........................................................................................................................................ 13
5.1.9 Seek(10).............................................................................................................................................. 14
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