Persistent Reserve Out 5Fh - Sony SDX-900V Product Specifications

6.Command Specification

6.10. PERSISTENT RESERVE OUT 5Fh

Bit 7
Byte
0
1 Reserved
2
3
4
5
6
7 (MSB)
8
9 Unused (00b)
The PERSISTENT RESERVE OUT command is used to request service actions that reserve a logical unit or
element for the exclusive or shared used if a particular initiator. The command uses other service actions to manage
and remove such reservations. The command shall be used in conjunction with the PERSISTENT RESERVE IN
command and shall not be used with the RESERVE and RELEASE commands.
Initiator performing PERSISTENT RESERVE OUT service actions are identified by a reservation key provided by
the application client. An application client may use the PERSISTENT RESERVE IN command to identify which
initiators are holding a persistent reservation and use the PERSISTENT RESERVE OUT command to preempt that
reservation if required.
If a PERSISTENT RESERVE OUT command is attempted, but there are insufficient drive resources to complete the
operation, the drive shall return a CHECK CONDITION status. The sense key shall be set to ILLEGAL REQUEST
and the additional sense data shall be set to INSUFFICIENT REGISTRATION RESOURCES.
The PERSISTENT RESERVE OUT command contains fields that specify a persistent reservation service action, the
intended scope of the persistent reservation, and the restrictions caused by the persistent reservation. The TYPE
and SCOPE fields are define in 6.9. If a SCOPE filed specifies a scope that is not implemented, the drive shall return
a CHECK CONDITION status. The sense key shall be set to ILLEGAL REQUEST and additional sense data shall be
set to INVALID FIELD IN CDB.
Fields contained in the PERSISTENT RESERVE OUT parameter list specify the information required to perform a
particular persistent reservation service action.
The parameter list shall be 24 bytes in length and the Parameter List Length field shall contain 24(18h). If the
parameter list length is not 24, the drive shall return a CHECK CONDITION status. The sense key shall be set to
ILLGAL REQUEST and the additional sense data shall be set to PARAMETER LIST LENGTH ERROR.
SERVICE ACTION: When processing the PERSISTENT RESERVE OUT service actions, the drive shall increment
the generation value as specified in 6.9.
Table 6-60: PERSISTENT RESERVE OUT SERVICE ACTION codes
Code Name
00h REGISTER
01h RESERVE
02h RELEASE
03h CLEAR
04h PREEMPT
05h PREEMPT &
ABORT
06h-1Fh Reserved
The parameter list required to perform the PERSISTENT RESERVE OUT command has the following format:
6-62
6 5 4
Operation Code (5Fh)
SCOPE
Parameter List Length (18h)
Register a reservation key with the drive
Create a persistent reservation having a specified SCOPE and TYPE. The
SCOPE and TYPE of a persistent reservation are defined in 6.9
Releases the selected reservation for the requesting initiator.
Clears all reservation keys and all persistent reservations.
Preempts persistent reservations from another initiator.
Preempts persistent reservations from another initiator and aborts the task set for
the preempted initiator.
PERSISTENT RESERVE OUT
3 2
SERVICE ACTION
Reserved
Reserved
Reserved
Reserved
Reserved
Description
SONY AIT-4 drive SDX-900V series Ver.2.1
1 0
TYPE
(LSB)
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