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Overwrite Ext Command (Feature: 0014h)
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 Low
-
-
-
-
-
-
-
-
Data Low
-
-
-
-
-
-
-
-
Data High
-
-
-
-
-
-
-
-
Data High
-
-
-
-
-
-
-
-
Current
0
0
0
1
0
1
0
0
Feature
Error
...See Below...
Previous
0
0
0
0
0
0
0
0
Current
V
-
-
V
V
V
V
V
HOB=0
-
-
-
-
-
-
-
-
Sector Count
Sector Count
Previous
-
-
-
-
-
-
-
-
HOB=1
V
V
V
-
-
-
-
-
Current
V
V
V
V
V
V
V
V
HOB=0
V
V
V
V V V V V
Sector Number
Sector Number
Previous
V
V
V
V
V
V
V
V
HOB=1
-
-
-
-
-
-
-
-
Current
V
V
V
V
V
V
V
V
HOB=0
V
V
V
V V V V V
Cylinder Low
Cylinder Low
Previous
0
1
0
1
0
1
1
1
HOB=1
-
-
-
-
-
-
-
-
Current
V
V
V
V
V
V
V
V
HOB=0
-
-
-
-
-
-
-
-
Cylinder High
Cylinder High
Previous
0
1
0
0
1
1
1
1
HOB=1
-
-
-
-
-
-
-
-
Device/Head
1
1
1
D
-
-
-
-
Device/Head
-
-
-
-
-
-
-
-
Command
1
0
1
1
0
1
0
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
V
Vs
0
V
0
V
0
0
0
V
0
V
-
0
-
V
Table 199 Overwrite Ext Command (B4h/0014h)
The OVERWRITE EXT command starts an overwrite operation (i.e., a sanitize operation on the internal media that
stores user data) which fills the user data area with a four byte pattern specified in the LBA field of the command.
Parameters for the OVERWRITE EXT command include a count for multiple overwrites and the option to invert the
four byte pattern between consecutive overwrite passes.
After the overwrite operation has been successfully applied, affected data blocks are readable without error.
The OVERWRITE EXT command only is processed if:
a) the Sanitize Device feature set is supported
b) the device is in the SD0: Sanitize Idle state, the SD3: Sanitize Operation Failed state, or the SD4: Sanitize
Operation Succeeded state.
243
Western Digital Ultrastar DC HC310 SATA Product Manual