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Product Manual - Disc Drive SCSI-2/SCSI-3 Interface (Vol. 2; Ver. 2), Rev. E
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Extended Sense Data Format
The drive is capable of sending 18 bytes of extended sense data, and does send 18 bytes if the Allocation
Length of the Request Sense Command is equal to or greater than 18 bytes (otherwise, the number of bytes
specified by the Allocation Length are sent). The Extended Sense Data Format is summarized in Table 5.1.1-
4. Numbers in parentheses in the sense data are references to notes following the table. A “1” or a “0” means
the data bit is always logic 1 or logic 0, respectively, when sent by a disc drive.
Table 5.1.1-4. Disc drive Extended Sense Data Summary
Bit
7
6
5
4
3
2
1
0
Byte(s)
0
Validity
1
1
1
0
0
0
0 OR
Bit [1]
1
1
1
0
0
0
1 [2]
Error Code
1
0
0
0
0
0
0
0
0
Segment Number
[3]
2
0
0
0
0
Filemark
EOM
ILI
Sense Key
[7]
[4]
[5]
[6]
3
Information Byte (MSB)
[8]
4
:
:
5
:
:
6
Information Byte (LSB)
[8]
7
Additional Sense Length -
Decimal 10 (Max)
[9]
8
9
Bytes 8 - 11 are for Command
10
Specific Data.
11
12
Additional Sense Code
[10]
13
Additional Sense Code Qualifier
[10]
14
Reserved for Seagate internal use only
[11]
15
SKSV
[12]
Sense Key Specific
[13]
16
17
18—n
Product Unique Sense Data
[14]
[ ] For notes see next page.
