HP C737990900 - Manual (Page 36)

36 Commands—Introduction
Media Information Check
During power-on and following a SCSI reset, knowledge of the whereabouts of
the cartridge is unavailable. It is not possible to execute commands which
assume that this knowledge is available until the drive has recovered from the
power-on or reset.
The test checks whether the drive knows if a cartridge is physically present in
the drive.
If information about the tape cartridge is not available, the test fails with
CHECK CONDITION , a sense key of NOT READY , and additional sense of 3E00
(logical unit has not self-configured yet).