HP Q153090901 - Manual (Page 176)

Commands 176
TEST UNIT READY 00h
T EST UNIT READY checks if the drive is ready for commands that access the tape. This is done by
the pre-execution Media Access check; it is not a request for a self-test. If the drive has a tape
loaded, the command returns a GOOD status. Otherwise, CHECK CONDITION is reported and the
sense key is NOT READY .
Pre-execution checks:
Command descriptor block:
Test Unit Ready specific status:
If all the pre-execution checks pass, GOOD status is reported.
Illegal Field Reservation Deferred Error
Unit Attention Media Access Media Information
7 6 5 4 3 2 1 0
0 Operation Code (00h)
1
Reserved (0)
4
5
Control