222
Western Digital Hard Disk Drive OEM Specification
11.36
Request Sense Data Ext (0Bh)
Com m and Block Output Registers
Com m and 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
-
-
-
-
-
-
-
-
Feature
Current
-
-
-
-
-
-
-
-
Error
...See Below ...
Previous
-
-
-
-
-
-
-
-
Sector Count
Current
-
-
-
-
-
-
-
-
Sector Count
HOB=0
-
-
-
-
-
-
-
-
Previous
-
-
-
-
-
-
-
-
HOB=1
-
-
-
-
-
-
-
-
Sector Number
Current
-
-
-
-
-
-
-
-
Sector Number
HOB=0
V
V
V
V
V
V
V
V
Previous
-
-
-
-
-
-
-
-
HOB=1
-
-
-
-
-
-
-
-
Cylinder Low
Current
-
-
-
-
-
-
-
-
Cylinder Low
HOB=0
V
V
V
V
V
V
V
V
Previous
-
-
-
-
-
-
-
-
HOB=1
-
-
-
-
-
-
-
-
Cylinder High
Current
-
-
-
-
-
-
-
-
Cylinder High
HOB=0
-
-
-
-
V
V
V V
Previous
-
-
-
-
-
-
-
-
HOB=1
-
-
-
-
-
-
-
-
Device/Head
1
1 1
D
-
-
-
-
Device/Head
-
-
-
-
-
-
-
-
Command
0
0
0
0
1
0
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
V
Table 194 Request Sense Data Ext command (0Bh)
The Request Sense Data Ext command allows the reporting of the most recent sense data from the device.
When sense data is available, the sense key (K), additional sense code (C), and additional sense code qualifier (Q)
fields shall be set to values that are defined in the SPC-4 standard.
Otherwise, the sense key, additional sense code, and additional sense code qualifier shall be cleared to zero.
Default of Sense Data Reporting feature set is invalid.
Request Sense Data Ext returns KCQ of the latest command execution result except C3 Command. KCQ is deleted
after Request Sense Data Ext execution.
If another command is executed before Request Sense Data Ext execution, KCQ will be overwritten at the result of
another command.
Request Sense Data Ext is not dependent on a setup of NCQ Auto Sense.
Request Sense Data Ext returns KCQ of Error which occurred in NCQ Command.
In Error of the command Aborted in the state of CA, KCQ of Error which occurred in NCQ Command is not updated.
Error of Non NCQ Command can perform acquisition of Sense Data in Read Log Ext (Page = 10h).
However, if Request Sense Data Ext is performed before Read Log Ext execution, Sense Data will become invalid,
and the contents of Sense Data acquired by Read Log Ext are not guaranteed.
About Status Register bit 1(Sense Data Available)
The Sense Data Available bit shall be set to one if:
a)
IDENTIFY DEVICE data word 119 bit 6 is set to one;
b)
IDENTIFY DEVICE data word 120 bit 6 is set to one; and
