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11.46.6.6
Disable the EPC feature subcommand
Com m and Block Output Registers
Register
7
6
Data
-
-
Feature
0
1
Sector Count
-
-
Sector Number
-
-
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 218 Disable the EPC feature subcommand
On successful completion of this EPC subcommand, the device:
a) stop all EPC timers
b) disables the EPC feature set; and
c) clears IDENITFY DEVICE data word 120 bit 7 to zero.
If the EPC feature set is disabled, then the EPC feature set remains disabled across all resets (i.e., power-on reset,
hardware reset, and software reset).
Output Parameters To The Device
Sector Number
bit
7-4 Reserved
3-0 5h Disable the EPC feature subcommand (See Table 73)
Error Output
If the Extended Power Condition feature set is disabling, not supported then the device returns command aborted.
5
4
3
2
1
0
-
-
-
-
-
-
0
0
1
0
1
0
-
-
-
-
-
-
-
-
0
1
0
1
-
-
-
-
-
-
-
-
-
-
-
-
1
D
-
-
-
-
1
0
1
1
1
1
3
2
1
0
0
ABT
T0N AMN
0
V
0
0
Description
Western Digital Hard Disk Drive OEM Specification
Com m and Block Input Registers
Register
7
6
5
Data
-
-
-
...See Below ...
Error
Sector Count
-
-
-
Sector Number
-
-
-
Cylinder Low
-
-
-
Cylinder High
-
-
-
Device/Head
-
-
-
...See Below ...
Status
Status Register
7
6
5
4
BSY
RDY
DF
DSC DRQ COR
0
V
0
-
251
4
3
2
1
0
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
3
2
1
0
IDX
ERR
-
0
-
V
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