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REQUEST SENSE
0
1
3
4
5
128 Commands
The
command transfers sense data held within the drive to the
REQUEST SENSE
host during a data-in phase. The data is valid in the following circumstances:
After reporting
CHECK CONDITION
After a command has terminated with an unexpected
Immediately after the following commands that cause tape motion:
READ
WRITE
Positional sense data is valid whenever media is present and loaded and no
higher priority sense data is present. An unsolicited request sense (that is, one
with no preceding
CHECK CONDITION
data, which will be all zeros.
Note
The drive maintains valid positional information for normal read
and write commands only (
FILEMARKS
) are received this positional sense information is lost. See
BUFFER
"Sense Data Management" on page
The drive clears sense data for the host following execution of the
command for that host, unless the data is positional sense data.
SENSE
Pre-Execution Checks:
Only Illegal Field Check is performed before execution of the command.
Command Descriptor Block:
7
6
status to the host.
SPACE
WRITE FILEMARKS
) will result in sense data with no valid
READ
,
). If abnormal commands (such as
REWIND
5
4
3
Operation Code (03h)
Reserved (0)
Allocation Length
Control
.
BUS FREE
VERIFY
REWIND
,
,
,
WRITE
SPACE
WRITE
131.
REQUEST
2
1
03h
WRITE
0
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