User Manual

SCSI Commands Reference Manual, Rev. J 48
www.seagate.com General Concepts
SENSE DATA DESCRIPTORS field
Sense data descriptors (see table 13) provide specific sense information. A given type of sense data descriptor shall be included in the sense
data only when the information it contains is valid.
DESCRIPTOR TYPE field
The DESCRIPTOR TYPE field contains a type code (see table 14) that identifies the type of sense data descriptor. No more than one sense data
descriptor of each type shall be included in the descriptor format sense data.
ADDITIONAL LENGTH field
The ADDITIONAL LENGTH field indicates the number of sense data descriptor specific bytes that follow in the sense data descriptor.
Table 13 Sense data descriptor format
Bit
Byte
7 6 5 4 3 2 1 0
0
DESCRIPTOR TYPE
1
ADDITIONAL LENGTH (n-1)
2
(MSB)
SENSE DATA DESCRIPTOR SPECIFIC
. . .
n
(LSB)
Table 14 Sense data descriptor types
Type Description Reference
00h
Information 2.4.1.1.2
01h
Command specific information 2.4.1.1.3
02h
Sense key specific 2.4.1.1.4
03h
Field replaceable unit 2.4.1.1.5
04h
Stream commands SSC-3
05h
Block commands SBC-4
06h
OSD object identification OSD
07h
OSD response integrity check value OSD
08h
OSD attribute identification OSD
09h
ATA Return SAT
0Ah
Another Progress indication 2.4.1.1.6
0Bh - 7Fh
Reserved
80h - FFh
Vendor specific 2.4.1.1.7