User Manual

SCSI Commands Reference Manual, Rev. J 54
www.seagate.com General Concepts
2.4.1.1.5 Field replaceable unit sense data descriptor
The field replaceable unit sense data descriptor (see table 24) provides information about a component that has failed.
DESCRIPTOR TYPE and ADDITIONAL LENGTH fields
The DESCRIPTOR TYPE and ADDITIONAL LENGTH fields are described in 2.4.1.1.1. For the field replaceable unit sense data descriptor, the
DESCRIPTOR TYPE field shall be set to 03h and the ADDITIONAL LENGTH field shall be set to 02h.
FIELD REPLACEABLE UNIT CODE field
Non-zero values in the FIELD REPLACEABLE UNIT CODE field are used to identify a component that has failed. A value of zero in this field indi-
cates that no specific component has been identified to have failed or that the data is not available. The format of this information is not speci-
fied by this manual. Additional information about the field replaceable unit may be available in the ASCII Information VPD page, if supported
by the device server.
2.4.1.1.6 Progress indication sense data descriptor
If the sense key is set to NO SENSE or NOT READY, the progress indication sense data descriptor (see table 25) may be used to
provide a progress indication for one operation other than the one described by the non-descriptor fields in 2.4.1.1.1. The sense
data should include one progress indication sense data descriptor for each operation for which the device server is able to report
progress other than the operation described by the non-descriptor fields in 2.4.1.1.1.
DESCRIPTOR TYPE and ADDITIONAL LENGTH fields
The DESCRIPTOR TYPE field and ADDITIONAL LENGTH field are described in 2.4.1.1.1.
For the progress indications sense data descriptor:
a) the DESCRIPTOR TYPE field shall be set to 0Ah; and
b) the ADDITIONAL LENGTH field shall be set to 06h.
Table 24 Field replaceable unit sense data descriptor format
Bit
Byte
7 6 5 4 3 2 1 0
0
DESCRIPTOR TYPE (03h)
1
ADDITIONAL LENGTH (02h)
2
Reserved
3
FIELD REPLACEABLE UNIT CODE
Table 25 Progress indications sense data descriptor format
Bit
Byte
7 6 5 4 3 2 1 0
0
DESCRIPTOR TYPE (0Ah)
1
ADDITIONAL LENGTH (06h)
2
sense key
3
additional sense code
4
additional sense code qualifier
5
Reserved
6
MSB
progress indication
7
LSB