IBM Ultrastar 36LZX, Технические характеристики

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Preempt and Clear This service action does not conflict with a successfully established persistent
reservation.
If the initiator requesting the command has not previously performed a Register
service action, the command is rejected with a status of RESERVATION CONFLICT.
If the key specified in the Reservation key field is already registered but the initiator
which registered the key is different from the initiator requesting the command, the
drive returns a RESERVATION CONFLICT status.
Even if the key specified in the Service Action Reservation key field is not registered,
the drive makes new persistent reservation without preempting if it does not conflict
with an existing persistent reservation.
When the key is registered but reservation for the key is nothing yet and the new
persistent reservation does not conflict with an existing persistent reservation, the
drive makes new persistent reservation and clears the key and all commands from the
initiator which was registered the key.
When the key specified in the Service Action Reservation Key is cleared even if a
reservation for the key is nothing yet, the drive makes UNIT ATTENTION condition for
the initiator which was registered the key. The sense key is set to UNIT ATTENTION
and the additional sense data is set to RESERVATION PREEMPTED.
When PERSISTENT RESERVATION OUT command with this service action
completes successfully, the Generation counter is incremented.
The target does not clear any ACA condition associated with the initiator being
preempted because of the restriction of implementation for ACA handling. When any
ACA condition is generated for an initiator and any command from another initiator is
requested, the drive enqueues the command but does not reconnect for the command
until the ACA condition is cleared by the initiator associating the ACA condition.
Ultrastar 36LZX hard disk drive specifications
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