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Descriptor format
The Descriptor format of the returned data is as follows:
7
0
Valid
1
2
3
4–6
7
8
(MSB)
:
:
n
Returned Sense data fields:
Response Code
Additional Sense
Length
Additional Sense
Code and Qualifier
Sense Data
Descriptor
152
Commands
6
5
Reserved(0)
Additional Sense Code
Additional Sense Code Qualifier
Additional Sense Length (n–7)
Sense Data Descriptor 0
Sense Data Descriptor X
72h The error is current, that is, it is associated with the command for which
CHECK CONDITION
73h The error is deferred. A deferred error occurs when there is a failure for an
operation that has already been terminated with a GOOD status, or when
failure occurs in "cleanup" activity following an operation that was
terminated by BUS RELEASE. The command for which
status was reported is therefore unlikely to be the cause of the deferred error.
It simply gives the drive the opportunity to report
for an error that already exists.
The number of additional sense bytes to follow, 244. It is never truncated to reflect
the actual Transfer Length.
Additional information about the cause of the
tape position when the REQUEST SENSE is unsolicited. See "Additional Sense
Codes" on page 159.
At least one descriptor is sent (Drive Error Code), the others may or may not be sent
depending on the nature of the CHECK CONDITION.
4
3
2
Response Code
Sense Key
Reserved (0)
:
status has been reported.
CHECK CONDITION
1
0
(LSB)
CHECK CONDITION
status
CHECK CONDITION
, or the current
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