Sun Oracle Storage Tek T10000, Reference Manual

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Persistent Reserve Out Command
146 T10000: Interface Reference Manual • January 2011 • E20425-01
Clearing all Persistent Reservations and Keys
To clear all Persistent Reservations and key registrations, a registered initiator
sends a Persistent Reserve Out command with a Service Action field of Clear
(03h). The Scope and Type fields are ignored. The Parameter List Length is
set to 18h. In the parameter data, the Reservation Key is set to the currently
registered key for this initiator, the Service Action Reservation Key field is
ignored and the APTPL bit is set to zero.
Clearing reservations should only be done in an error recovery situation.
Pre-empting Reservations Made by Another Initiator
A registered initiator can clear active reservations and registration keys by
issuing a Persistent Reserve Out command. The Service Action field is set to
Pre-empt, the Scope and Type fields are ignored. The Parameter List Length
is set to 18h. In the parameter data, the Reservation Key is set to the currently
registered key for this initiator. The Service Action Reservation Key field
contains the registered key to be cleared. If the Service Action Reservation
Key was used to make the currently active persistent reservation, the
reservation is released.
If the Service Action field is set to Pre-empt and Abort instead of Pre-empt, all
commands belonging to initiators who registered with the cleared key will be
aborted.
When a reservation of type Exclusive Access, Registrants Only is Pre-empted,
a unit attention condition is established for the Pre-empted initiators.