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AT Attachment 8 - ATA/ATAPI Command Set
Working Draft Project
American National
Revision 6a
September 6, 2008
Information technology -
AT Attachment 8 - ATA/ATAPI Command Set (ATA8-ACS)
This is a draft proposed American National Standard of Accredited Standards Committee INCITS. As such this is
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Reference number
ISO/IEC xxxx-xxx:200x
ANSI INCITS 452-2008
T13/1699-D Revision 6a
September 6, 2008
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American National Standard
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Working Draft AT Attachment 8 - ATA/ATAPI Command Set (ATA8-ACS)
September 6, 2008
T13/1699-D Revision 6a
Information Technology Industry Council
Approved mm.dd.yy
American National Standards Institute, Inc.
This standard specifies the AT Attachment command set used to communicate between host systems and
storage devices. This provides a common command set for systems manufacturers, system integrators,
software suppliers, and suppliers of storage devices. The AT Attachment command set includes the PACKET
feature set implemented by devices commonly known as ATAPI devices. This standard maintains a high degree
of compatibility with the AT Attachment Interface with Packet Interface - 7 (ATA/ATAPI-7) volume 1 (see ANSI
INCITS 397-2004).
Working Draft AT Attachment 8 - ATA/ATAPI Command Set (ATA8-ACS)
T13/1699-D Revision 6a
September 6, 2008
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Working Draft AT Attachment 8 - ATA/ATAPI Command Set (ATA8-ACS)
September 6, 2008
T13/1699-D Revision 6a
Document Status
Document e06122 is the issues list for this draft. e06122 contains a list of the issues associated with the
document, an issue number that remains assigned to the issue for the life of document development, a resolution
to the issue, an owner for the issue, and a disposition for the issue. All major changes associated with this draft
starting with Rev 3b are first documented in e06122 and given a number. This includes proposals which are
targeted for inclusion into this draft. This text which is highlighted in green may affect backward compatibility.
Revision History (part 1 of 21)
August 17, 2004
1) Initial revision created from ATA/ATAPI-7 Volume 1 (1532D Rev 4b).
2) Removed 3 volume structure and changed abstract to reflect a
command set document
3) Removed sections on signal, bit, and timing conventions
4) Removed clause 5, I/O register descriptions
5) Kept informative annex’s A-C
September 7, 2004
1) Restructured all commands to conform to format agreed to in e04139r4.
2) Added a section defining status bits
3) Added a section defining error bits
4) Added a section describing protocols
5) Added a section describing interrupt reason
6) Incorporated single log table e04143r0 table. Did not add wording to
status that host VS pages are common between SMART and GPL.
7) Removed prohibited statements from command definitions. These
reside in the feature set definitions.
October 6, 2004
1) Replaced duplicate Normal Outputs tables with a see clause to the first
2) Replaced many Error Outputs with a see clause.
February 17, 2005
1) Stripped unused informative references
2) Changed the definition of ordered and unordered lists to make the
numeric form ordered.
3) Changed all the lists to conform to the changes in #2
4) Reserved 5Ch-5Fh for TCG. This was done by added command
headers and a reserved statement in the command section. Also
marked the commands with T in the command matrix table.
5) Moved Normal and Error Outputs to their own section. Commands now
have a hotlink to the tables.
6) Moved IDENTIFY (PACKET) DATA to its own section (Input Data)
7) Changed more of the titles to be consistent with the front cover.
8) Deleted unused definitions
9) Changed the General feature set to only apply to non-packet devices
10) Changed the packet feature set to include all the commands in the
packet feature set.
11) The command prohibitions are now found in the feature set description
and not with each command.
12) Integrated e04127r0 – This makes SATA signatures reserved with no
Working Draft AT Attachment 8 - ATA/ATAPI Command Set (ATA8-ACS)
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