HP C737990900 - Manual (Page 57)

Commands 57
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If the Load was issued by some other host (or was an autoload) and
completed successfully, CHECK CONDITION is reported, with a sense key of
UNIT ATTENTION and additional sense of 2800h (not ready to ready
transition).
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If the Load was issued by the current host and failed, CHECK CONDITION is
reported, since a deferred error condition will exist for the current host.
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If the Load was issued by some other host and failed, the load will be re-
attempted on behalf of the current host.
Unloading a Cartridge
If an unload is requested and there is a tape present in the drive (either
loaded, loading or unloading):
1 Any buffered data is written to tape.
2 The tape is rewound to the physical BOM (beginning of media).
3 If medium removal is prevented, CHECK CONDITION is reported with a
sense key of ILLEGAL REQUEST and additional sense of 5302h (medium
removal prevented).
4 G OOD status is reported if the tape unloaded successfully. Otherwise,
another unload operation is initiated on behalf of the host that issued the
unload request.
Following an unload, any media access commands will be rejected by the
Media Access check.
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If an unload request is received while the tape is in the process of
unloading (for example, as a result of pressing the eject button), it will be
queued until the unload is complete.
■
If an unload request is received while there is no tape present, or if a tape
is present but not loaded and medium removal is prevented, GOOD status
is reported.
It is possible to unload and eject the cartridge by pressing the Eject button on
the front panel.