Release Unit; Byte Release Unit Command - IBM Ultrium Internal Tape Drive T200 Reference Manual

RELEASE UNIT

The RELEASE UNIT command removes a reservation made by a RESERVE UNIT
command. If there is an existing reservation from the same initiator with the same
parameters, then that reservation is removed and Good status is returned. It is not
an error to attempt to release a reservation that is not currently valid or is held by
another initiator. In this case, the drive returns Good status without altering any
reservation.
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Ultrium Internal Tape Drive and 3580 Ultrium Tape Drive: SCSI Reference
Table 70. Byte RELEASE UNIT Command
7 6
0
1 Logical Unit Number (0)
2
3
4
5
Table 71. Byte Release Unit Command
7 6
0
1 Logical Unit Number (0)
2
3
4
5
6
7
8
9
5 4 3
Operation Code (17h)
3rdPty Third Party Device ID (0)
Reservation Identification
Reserved
Allocation Length (0)
Control
5 4 3
Operation Code (57h)
3rdPty (0)
Reserved
Third Party Device ID (0)
Reserved
Reserved
Reserved
Parameter List Length(0)
Control
2 1 0
Element
2 1 0
LongID (0) Reserved