Specifications

8.13.5.3 Service Action Reservation Key
On Register service action, the drive saves the key specified in the Service Action Reservation Key field
as a key of initiator requesting PERSISTENT RESERVATION OUT command.
On Preempt and Clear service action, the reservation which has a key specified in the Service Action
Reservation Key field is preempted.
On other service actions, this field is ignored.
8.13.5.4 Scope-specified address
Parameter in the Scope-specified address field is ignored by the drive.
8.13.5.5 Extent length
Parameter in the Extent length field is ignored by the drive.
8.13.5.6 APTPL
The APTPL (Active Persist Through Power Loss) is valid only for the Register service action. The drive
ignores the APTPL in other service actions.
The following table shows the relationship between the last valid APTPL value and information held by the
drive.
set to 0set to 0Generation counter
retainedall are removedPersistent Reservation
retainedall keys are set to 0Registration
10
The last valid APTPL value
Information
held by the drive
Figure 119. APTPL and information held by a drive
8.13.5.7 Generation counter
The drive increments the Generation counter when Register service action or Preempt and Abort service
action complete successfully.
Ultrastar 146Z10 hard disk drive specifications
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