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10.8.45 Device Configuration (B1h)
This command has a number of separate functions which can be selected via the Feature Register when the
command is issued. The subcommands and their respective codes are listed below.
Subcommand
Feature
Register
DEVICE CONFIGURATION RESTORE
C0h
DEVICE CONFIGURATION FREEZE LOCK
C1h
DEVICE CONFIGURATION IDENTIFY
C2h
DEVICE CONFIGURATION SET
C3h
10.8.45.1 Device Configuration Restore
COMMAND CODE
1 0 1 1 0 0 0 1
REGISTER
REGISTER SETTING
NORMAL COMPLETION
DR
DRIVE No.
no change
CY na
no
change
HD na
no
change
SN na
no
change
SC na
no
change
FT C0h
no
change
LBA na
no
change
The DEVICE CONFIGURATION RESTORE command disables any setting previously made by a DEVICE
CONFIGURATION SET command and returns the content of the IDENTIFY DEVICE or IDENTIFY PACKET
DEVICE command response to the original settings as indicated by the data returned from the execution of a
DEVICE CONFIGURATION IDENTIFY command.
10.8.45.2 Device Configuration Freeze Lock
COMMAND CODE
1 0 1 1 0 0 0 1
REGISTER
REGISTER SETTING
NORMAL COMPLETION
DR
DRIVE No.
no change
CY na
no
change
HD na
no
change
SN na
no
change
SC na
no
change
FT C1h
no
change
LBA na
no
change
The DEVICE CONFIGURATION FREEZE LOCK command prevents accidental modification of the Device
Configuration Overlay settings. After successful execution of a DEVICE CONFIGURATION FREEZE LOCK
command, all DEVICE CONFIGURATION SET, DEVICE CONFIGURATION FREEZE LOCK, DEVICE
CONFIGURATION IDENTIFY, and DEVICE CONFIGURATION RESTORE commands are aborted by the
device. The DEVICE CONFIGURATION FREEZE LOCK condition shall be cleared by a power-down. The
DEVICE CONFIGURATION FREEZE LOCK condition shall not be cleared by hardware or software reset.
