PERSISTENT RESERVE OUT 5Fh
C
omm
an
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101
PERSISTENT RESERVE OUT
5Fh
P
ERSISTENT RESERVE OUT
is used to request service actions that create a persistent reservation in a
logical unit within the tape drive for the exclusive or shared use of a particular I_T nexus. The
command uses other service actions to manage and remove such persistent reservations.
An I_T nexus performing Persistent Reserve Out service actions is identified by a reservation key.
Pre-execution checks:
Command descriptor block:
CDB fields:
Illegal Field
Reservation
Deferred Error
Unit Attention
7
6
5
4
3
2
1
0
0
Operation Code (5Fh)
1
Reserved (0)
Service Action
2
Scope
Type
3
Reserved (0)
6
7
Parameter List Length
8
9
Control
Service Action
00b Register
Registers or unregisters a reservation key with the device
server.
01b Reserve
Creates the persistent reservation.
02b Release
Releases the persistent reservation.
03h Clear
Clears all reservation keys and the persistent reservation.
04h Preempt
Pre-empts the persistent reservation and/or remove
registrations.
05h Preempt and Abort Pre-empts the persistent reservation and/or remove
registrations, and aborts all tasks for all pre-empted I_T
nexuses.
06h Register and
Ignore Existing Key
Registers or unregisters a reservation key with the device
server.
Scope
0 Indicates LU_SCOPE.