Sony SDX-800V/R Benutzerhandbuch

6-62 

 

SONY AIT-3Ex drive SDX-800V series Ver.1.1 

Operation Code (5Fh) 

Reserved 

  

SERVICE ACTION   

 

SCOPE TYPE 

 Reserved  

 Reserved  

 Reserved  

 Reserved  

(MSB) 

Parameter List Length (18h) 

 

  

(LSB) 

Unused (00b) 

Reserved 

Flag 

Link 

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. 

00h 

 REGISTER 

Register a reservation key with the drive 

01h 

RESERVE 

Create a persistent reservation having a specified SCOPE and TYPE. The 

SCOPE and TYPE of a persistent reservation are defined in 6.9 

02h 

RELEASE 

Releases the selected reservation for the requesting initiator. 

03h 

CLEAR 

Clears all reservation keys and all persistent reservations. 

04h 

PREEMPT 

Preempts persistent reservations from another initiator. 

05h PREEMPT 

& 

ABORT 

Preempts persistent reservations from another initiator and aborts the task set for 

the preempted initiator. 

06h-1Fh Reserved 

The parameter list required to perform the PERSISTENT RESERVE OUT command has the following format: