Commands 129
Commands
CDB Fields:
Request Sense Data
The following diagram shows the format of the data returned for the REQUEST
SENSE
command following the reporting of CHECK CONDITION by the drive:
Logical Unit
Number
This field is ignored.
Allocation
Length
0 No data is transferred to the host.
>0 The maximum amount of sense data in bytes that should be transferred to the host. The
drive returns up to Allocation Length bytes of data; any extra sense data is lost.
7 6 5 4 3 2 1 0
0
Valid Error Code
1
Segment Number (0)
2
Mark EOM ILI Rsvd(0) Sense Key
3
(MSB)
Information Bytes
6
(LSB)
7
Additional Sense Length (0Eh)
8
(MSB)
Command Specific Information Bytes
11
(LSB)
12
Additional Sense Code
13
Additional Sense Code Qualifier
14
Field Replaceable Unit Code
15
SKSV C/D Reserved (0) BPV Bit Pointer
16
(MSB)
Field Pointer/Drive Error Code
17
(LSB)
18–20
Reserved (0)
21
Reserved (0) CLN Reserved (0)
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