Western Digital Ultrastar DC HC310 - Table 218 Disable the EPC Feature Subcommand

251
Western Digital Hard Disk Drive OEM Specification
11.46.6.6 Disable the EPC feature subcommand
Command Block Output Registers
Command Block Input Registers
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
-
-
-
-
-
-
-
-
Sector Count
-
-
-
-
-
-
-
-
Sector Number
-
-
-
-
0
1
0
1
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
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
Description
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.