Command Set - Seagate Medalist 1270 Product Manual

Medalist 1270 Product Manual, August 1995

3.2 Command set

This section lists all of the ATA commands the drive uses. Only the
commands with unique implementation for the drive are discussed in this
manual. For a complete description of all of the other ATA interface
commands that are used, refer to the Seagate ATA Interface Reference
Manual , part number 36111- xxx . Additional information on Fast ATA-re-
lated features is provided by the Small Form Factor specification, SFF-
8011 Rev 1.1, September 18, 1993.
The Set Features command and the Sleep command, described in the
Seagate ATA Interface Reference Manual , require further elaboration.
These commands are described in Section 3.2.2 and 3.2.4.
The table below lists all commands implemented in the drive. It uses the
following abbreviations:
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.
Command name
Active and Set Idle Timer
Active Immediate
Check Idle Mode
Check Power Mode
Execute Drive Diagnostics
Format Track
continued
Parameters used
Command
code (in hex)
FR SC SN CY DH
FB n y
F9 n n
FD n y
98, E5 n y
90 n n
50 n y
27
n n D
n n D
n n D
n n D
n n D
n y y