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11.46.6 Extended Power Conditions (EPC) feature
11.46.6.1
Restore Power Condition Settings subcommand
Com m and Block Output Registers
Register
7
6
Data
-
Feature
0
1
Sector Count
V
V
Sector Number
-
V
Cylinder Low
-
Cylinder High
-
Device/Head
1
Command
1
1
Error Register
7
6
5
4
CRC
UNC
0
IDN
0
0
0
0
Table 213 Restore Power Condition Settings subcommand
On successful completion of this EPC subcommand, the device updates the Power Conditions log for the selected
Power Condition ID as follows:
1) if Default is set to one, then:
A) copy the Default Timer Settings field to the Current Timer Settings field; and
B) copy the Default Timer Enabled field to the Current Timer Enabled field;
2) if Default is cleared to zero, then:
A) copy the Saved Timer Settings field to the Current Timer Settings field; and
B) copy the Saved Timer Enabled field to the Current Timer Enabled field;
and
3) if Save is set to one and the power condition is savable, then:
A) copy the Current Timer Settings field to the Saved Timer Settings field;
Output Parameters To The Device
Sector Count
Power Condition ID (See Table 74)
Sector Number bit
7
6
5
4
3-0
Error Output
If any selected Power Condition is not supported, or is not changeable, or if Extended Power Condition feature set is
disable, or if Save is set to one and any selected power condition is not savable, then the device returns command
aborted .
5
4
3
2
1
0
-
-
-
-
-
-
-
0
0
1
0
1
0
V
V
V
V
V
V
-
V
0
0
0
0
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
1
D
-
-
-
-
1
0
1
1
1
1
3
2
1
0
0
ABT T0N AMN
0
V
0
0
Description
Reserved
Default
1
Restore from Default settings
0
Restore from Saved settings
Reserved
Save
1
Save settings on completion
0
Do not save settings on completion
0h Restore Power Condition subcommand (See Table 73)
Western Digital Hard Disk Drive OEM Specification
Com m and Block Input Registers
Register
7
6
Data
-
-
Error
Sector Count
-
-
Sector Number
-
-
Cylinder Low
-
-
Cylinder High
-
-
Device/Head
-
-
Status
Status Register
7
6
5
4
BSY
RDY
DF
DSC DRQ COR
0
V
0
-
245
5
4
3
2
1
0
-
-
-
-
-
-
...See Below ...
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
...See Below ...
3
2
1
0
IDX
ERR
-
0
-
V
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