Fujitsu MBA3147RC Manuel D’Utilisation

 

 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 (HDD) under a multi-initiator environment. 

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

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

command. 

2)  Receiving HARD RESET primitive from any INIT. 

3)  Switching the HDD's power off or on. 

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

After the Reserved status is established, a command issued by an INIT other than the 
device that reserved the HDD is rejected, except an INQUIRY, REQUEST SENSE, 
REPORT LUNS, 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 HDD by a SAS 
device which does not have the Reserve Right is disregarded. 

180 

C141-C013