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LOAD/UNLOAD
0
1
2
3
4
5
0 The drive reports status after the command has completed.
Immed
1 The drive reports status when it starts the command (after any pre-execution checks
The
/
command allows the host to specify that a tape cartridge
LOAD
UNLOAD
present in the drive is either made ready for data transfer ("loaded") or
disabled for data transfer (if Prevent Media Removal is set). It can also cause
the cartridge to be ejected from the drive ("unloaded").
Pre-Execution Checks:
Illegal Field
Unit Attention
If an unload is to be performed, the drive checks if the tape is currently being
loaded. If it is,
CHECK CONDITION
and additional sense of 0401h (becoming ready).
If a load is to be performed, the drive checks to ensure that a tape cartridge is
present. If not, it reports
CHECK CONDITION
and additional sense of 3A00h (medium not present). If the media is currently
being unloaded or ejected, it reports
and additional sense of 0400h (cause not reportable).
NOT READY
Command Descriptor Block:
7
6
5
Reserved (0)
CDB Fields:
and prerequisite unloads have completed).
Reservation
Diagnostic Status
is reported with a sense key of
with a sense key of
CHECK CONDITION
4
3
Operation Code (1Bh)
Reserved (0)
Reserved (0)
Reserved (0)
Hold
EOT (0)
Control
1Bh
Deferred Error
Media Information
NOT READY
NOT READY
with sense key of
2
1
0
Immed
ReTen
Load
Commands
55
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