Service Action; Table 100. Persistent Reserve Out, Service Action Code - Hitachi HUS151473VL3800 - Ultrastar 73.4 GB Hard Drive Specifications

17.13.1 Service Action

The following service action codes are implemented. If a code which is not supported or a reserved code is specified, the drive
returns a Check Condition status. The sense key is set to Illegal Request and the additional sense data is set to Invalid Field in
CDB. In case of PERSISTENT RESERVE OUT command executing a Register service action, this field is ignored.
Table 100: PERSISTENT RESERVE OUT, Service Action Code
Code Name
00h Register
01h Reserve
02h Release
03h Clear
04h Preempt
05h Preempt and Abort
Register and
06h
Ignore existing key
07h
- Reserved
1Fh
• Register
This service action may conflict with a successfully established persistent reservation.
If the key specified in the reservation key field is not registered yet, a key specified in the Service Action Reservation
Key is registered as new key. If the key is already registered but the Initiator which registered the key is different
from the Initiator requesting the command, the drive returns Reservation Conflict status. If the key is already regis-
tered and the key is for the Initiator requesting the command, the key is replaced with new key specified in the Ser-
vice Action Reservation Key field.
Up to four keys can be held at the same time. When four keys are already registered, PERSISTENT RESERVE OUT
command with Register service action which does not replace an existing key is rejected with Reservation Conflict
status.
When PERSISTENT RESERVE OUT command with Register service action completes successfully, the Generation
counter is incremented.
When keys are registered, the drive returns Reservation Conflict status against the RESERVE command and the
RELEASE command.
Hitachi Confidential
Description
Register a reservation key with the device server
Create a persistent reservation using a reservation key
Release a persistent reservation
Clear all reservation keys and all persistent reservations
Preempt persistent reservations from another Initiator
Preempt persistent reservations from another Initiator
and clear the task set for the preempted Initiator
Register a reservation key with the drive
Reserved
Hitachi Ultrastar 15K147 SCSI Hard Disk Drive Specification
148
Support
Yes
Yes
Yes
Yes
No
Yes
Yes
---