PERSISTENT RESERVE OUT 5Fh
Commands
101
PERSISTENT RESERVE OUT 5Fh
PERSISTENT 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 0Indicates LU_SCOPE.
