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3.2 Command set
This section lists all of the ATA commands the drives use. Only the
commands with unique implementation for the drives are discussed in
this manual. For information about the ATA interface, refer to
Working
Draft X3T10.2008D Rev. 6, Information Technology—AT Attachment-3
Interface ATA-3
. Additional information about the drive commands and
features is provided in the
Seagate ATA Interface Reference Manual,
36311-xxx
,
Small Form Factor Specification, SFF-8011 Rev 1.1, Sep-
tember 18, 1993
, and
Small Form-Factor Committee Specification Draft
SFF-8055i, January 8,1996, Revision 1.0, Preliminary Document
.
The table below lists all commands that the drives use. The following
abbreviations are used:
FR Features register
SC Sector Count register
SN Sector Number register
CY Cylinder register
DH Drive/Head register
n This register does not contain a valid parameter for this
command.
y This register contains a valid parameter for this command. In
the Drive/Head register, both the drive and head parameters
are valid for this command.
D The Drive/Head register contains a valid drive parameter for
this command. The head parameter is not valid for this
command.
Note.
Read DMA, Read Long, Read Sector, Read Verify Sector, Write
DMA, Write Long and Write Sector support with retry and without
retry commands.
Command name
Command
code (in hex)
Parameters used
FR SC SN CY DH
Active and Set Idle Timer FB n y n n D
Active Immediate F9 nnnnD
Check Idle Mode FD n y n n D
Check Power Mode 98, E5 n y n n D
Execute Drives Diagnostic 90 nnnnD
continued
Medalist Pro 6450/6451 Product Manual, Rev. B 27