Текст страницы
12.49.6.6 Disable the EPC feature subcommand (5h)
Table 212 Disable the EPC feature 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
-
-
-
-
-
-
-
-
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
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 65)
Error Output
If the Extended Power Condition feature set is disabling, not supported then the device returns command aborted.
12.49.7
Repurposing Depopulation Feature (5Bh : Vendor Specific)
When the Feature register is 5Bh (Repurposing Depopulation Feature, also known as RDP), the Sector Count
Register specifies whether the Repurposing Depopulation feature will be enabled. When the value is set to 01h, RDP
commands are enabled. When the value is set to 00h, RDP commands are disabled. This setting is persistent
over a power cycle.
289
Hard Disk Drive Specification