User Manual

SCSI Commands Reference Manual, Rev. J 55
www.seagate.com General Concepts
SENSE KEY field
The SENSE KEY field indicates the operation for which this progress indication sense data descriptor provides a progress indication. A list of
sense key values is in
2.4.1.5.
ADDITIONAL SENSE CODE field
The ADDITIONAL SENSE CODE (ASC) field indicates the operation for which this progress indication sense data descriptor provides a progress
indication. A list of additional sense codes is in
2.4.1.6.
ADDITIONAL SENSE CODE QUALIFIER field
The ADDITIONAL SENSE CODE QUALIFIER (ASCQ) field indicates detailed information related to the additional sense code for the operation for
which this progress indication sense data descriptor provides a progress indication. The value returned in the ADDITIONAL SENSE CODE QUAL-
IFIER (ASCQ) field shall be as specified in 2.4.1.6.
PROGESS INDICATION field
The PROGESS INDICATION field indicates a percent complete for the operation indicated by the SENSE KEY field, the ADDITIONAL SENSE CODE
field, and the ADDITIONAL SENSE CODE QUALIFIER field. The value in the PROGESS INDICATION field shall be as defined in
2.4.1.1.4.4.
2.4.1.1.7 Vendor specific sense data descriptors
Vendor specific sense data descriptors (see table 26) contain vendor specific data that further defines the nature of the exception condition.
DESCRIPTOR TYPE and ADDITIONAL LENGTH fields
The DESCRIPTOR TYPE and ADDITIONAL LENGTH fields are described in 2.4.1.1.1. For the vendor specific sense data descriptor, the DESCRIP-
TOR TYPE field shall be set to a value between 80h and FFh, inclusive.
Table 26 Vendor specific sense data descriptor format
Bit
Byte
7 6 5 4 3 2 1 0
0
DESCRIPTOR TYPE (80h - FFh)
1
ADDITIONAL LENGTH (n-1)
2
(MSB)
VENDOR SPECIFIC
. . .
n
(LSB)