Fujitsu MAT3300FC 사용자 설명서

4-82 

C141-C008 

 

 Bit 
Byte 

7 6 5 4 3 2 1 0 

0 X‘16’ 

1 

0 

0 

0 

3rd Pty

3rd Pty Dev ID 

0 

2 

× 

× 

× 

× 

× 

× 

× 

× 

3 

× 

× 

× 

× 

× 

× 

× 

× 

4 

× 

× 

× 

× 

× 

× 

× 

× 

5 

0 0 0 0 0 0 0 0 

 

Together with the RELEASE command, this command controls exclusive access 
to the logical unit (IDD) under a multi-initiator environment. 

The IDD is reserved by this command for the INIT which issued this command. 

The values specified in bytes 2 to 4 of the CDB have no meaning and are 
disregarded, but it is preferable that the INIT specify X'00' in these bytes. 

(1)  Logical unit reserve function 

This command reserves the entire IDD (logical unit) for use as a special FC device.  
The reserve state established by this command is maintained until any one of the 
following conditions occurs. 

1)  The reserve condition is changed by the INIT that issued this command 

(Superseding Reserve). 

2)  Reserve is released by a RELEASE command from the INIT that issued this 

command. 

3)  Receiving TARGET RESET message from any INIT. 

4)  Receiving LIP (y, x). 

5)  Switching the IDD's power off or on. 

When an IDD is reserved for any FC device, if this command is issued by an INIT 
that doesn't have the "Reserve Right" for that IDD, this command is terminated 
with a RESERVATION CONFLICT status.   

After the Reserved status is established, a command issued by an INIT other than the 
FC device that reserved the IDD is rejected, except an INQUIRY, REQUEST SENSE 
or RELEASE command, and a RESERVATION CONFLICT status is reported to the 
INIT that issued that command.  A RELEASE command is the release operation 
specified in a RELEASE command issued to the IDD by a FC device which does not 
have the Reserve Right is disregarded.