Hitachi HUS151473VL3800 - Ultrastar 73.4 GB Hard Drive Specifications page 167

• Reserve
This service action does not conflict with a successfully established persistent reservation.
If the Initiator has not previously performed a Register service action, the command with this service action is
rejected with Reservation Conflict status.
If the key specified in the Reservation key field is already registered but the Initiator that registered the key is differ-
ent from the Initiator requesting the command, the Target returns Reservation Conflict status.
If persistent reservation that is being attempted conflicts with persistent reservation that is held, the Target returns a
Reservation Conflict status.
The established persistent reservation applies to all commands received after the successful completion of the com-
mand.
• Release
This service action may 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 that registered the key is differ-
ent from the Initiator requesting the command, the drive returns a Reservation Conflict status.
The drive returns Good status when a key specified in Reservation key field is not found.
When the key is found but the scope is different from the registered scope or the type is different from the registered
type, the command is rejected with Check Condition status. The sense key is set to Illegal Request and the additional
sense data is set to Invalid Release of Active Persistent Reservation.
• Clear
If the indicator requesting the command has not previously performed a Register service action, the command is
rejected with a status of Reservation Conflict.
• Preempt and Abort
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 that registered the key is differ-
ent 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 con-
flict with an existing persistent reservation, the drive makes new persistent reservation and clears the key and all
commands from the Initiator that 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 that was registered the key. The sense key is set to
Unit Attention and the additional sense data is set to Reservation Preempted.
When PERSISTENT RESERVE OUT command with this service action completes successfully, the Generation
counter is incremented.
• Register and Ignore Existing Key
This service action does not conflict with a successfully established persistent reservation.
The key specified in the Reservation Key field is ignored, and the key specified in the Service Action Reservation
Key field is registered as the new key, regardless of whether or not a key was already registered.
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Hitachi Ultrastar 15K147 SCSI Hard Disk Drive Specification
149