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12.49.6 Extended Power Conditions (EPC) (4Ah)
12.49.6.1 Restore Power Condition Settings subcommand (0h)
Table 207 Restore Power Condition Settings subcommand
Command Block Normal Outputs
Command Block Command Input
Register
7
6
5
4
3
2
1
0
Register
7
6
5
4
3
2
1
0
Data
-
-
-
-
-
-
-
-
Data
-
-
-
-
-
-
-
-
Feature
0
1
0
0
1
0
1
0
Error
…See Below…
Sector Count
V
V
V
V
V
V
V
V
Sector Count
-
-
-
-
-
-
-
-
Sector Number
-
V
-
V
0
0
0
0
Sector Number
-
-
-
-
-
-
-
-
Cylinder Low
-
-
-
-
-
-
-
-
Cylinder Low
-
-
-
-
-
-
-
-
Cylinder High
-
-
-
-
-
-
-
-
Cylinder High
-
-
-
-
-
-
-
-
Device/Head
1
-
1
D
-
-
-
-
Device/Head
-
-
-
-
-
-
-
-
Command
1
1
1
0
1
1
1
1
Status
…See Below…
Error Register
Status Register
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
CRC UNC 0
IDN 0
ABT T0N AMN
BSY RDY DF
DSC DRQ COR IDX ERR
0
0
0
0
0
V
0
0
0
V
0
-
-
0
-
V
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;
282
Hard Disk Drive Specification