User Manual

SCSI Commands Reference Manual, Rev. J 56
www.seagate.com General Concepts
2.4.1.2 Fixed format sense data
The fixed format sense data for response codes 70h (current errors) and 71h (deferred errors) is defined in table 27.
VALID bit
0 A VALID bit set to zero indicates that the INFORMATION field is not defined in this manual or any command standard.
1 A VALID bit set to one indicates the INFORMATION field contains valid information as defined in this manual or a command standard.
RESPONSE CODE field
The contents of the RESPONSE CODE field indicate the error type and format of the sense data (see 2.4.1). For fixed format sense data, the
RESPONSE CODE field shall be set to 70h or 71h.
FILE MARK bit
See the SSC-3 READ and SPACE commands for examples of FILEMARK bit usage.
EOM (End-of-Medium) bit
See the SSC-3 READ, SPACE, and WRITE commands for examples of end-of-medium (EOM) bit usage.
ILI (Incorrect length indicator) Bit
See the SBC-4 READ LONG, SBC-4 WRITE LONG, and SSC-3 READ commands and for examples of incorrect length indicator (ILI) bit usage.
Table 27 Fixed format sense data
Bit
Byte
7 6 5 4 3 2 1 0
0 VALID RESPONSE CODE (70h OR 71h)
1 Obsolete
2 FILEMARK EOM ILI Reserved SENSE KEY
3 (MSB)
INFORMATION. . .
6 (LSB)
7 ADDITIONAL SENSE LENGTH (n-7)
8 (MSB)
COMMAND-SPECIFIC INFORMATION. . .
11 (LSB)
12 ADDITIONAL SENSE CODE
13 ADDITIONAL SENSE CODE QUALIFIER
14 FIELD REPLACEABLE UNIT CODE
15 SKSV (MSB)
SENSE KEY SPECIFIC. . .
17 (LSB)
18 (MSB)
ADDITIONAL SENSE BYTES. . .
n (LSB)