Fujitsu MAN3735 Manuale Utente

C141-E124-01EN

3 - 45

x  Reserve right and the third party reserve function

In order to clarify the jurisdiction related to reserve and release, the term "Reserve Right" is
used in this manual.

1. If INIT #A issues a RESERVE command which does not specify the third party reserve

function to TARG #0, TARG #0 enters the reserved state from INIT #A and INIT #A has the
reserve right with respect to TARG #0.  In this case,

x 

INIT #A has an exclusive monopoly over TARG #0.

x 

Any commands issued to TARG #0 by any other SCSI device (INIT #B, TARG/INIT #1)
are rejected with a RESERVATION CONFLICT status, with the exception of an
INQUIRY, REQUEST SENSE or RELEASE command.  The RELEASE command is
terminated normally, but TARG #0's reserve state is not influenced by it.

2. If INIT #A issues a RESERVE command which specifies the third party reserve function ("3rd

Pty Dev ID" = TARG/INIT#1), TARG #0 becomes reserved from TARG/INIT #1, but INIT
#A has the reserve right.  In this case,

x 

TARG/INIT #1 has an exclusive monopoly of TARG #0.  However, if TARG/INIT#1
issues a RESERVE command, that command is rejected with a RESERVATION
CONFLICT status.  Also, a RELEASE command is terminated normally, but it has no
influence on the TARG #0 reserve right.

x 

INIT #A can issue INQUIRY, REQUEST SENSE, RELEASE and RESERVE commands
to TARG #0, but other commands are rejected with a RESERVATION CONFLICT
status.  A RELEASE or RELEASE EXTENDED command issued by INIT #A releases
TARG #0's reserved state.  Also, a RESERVE or RESERVE EXTENDED command
changes the reserve state of TARG #0.

x 

Commands issued by INIT #B to TARG #0 are rejected with a RESERVATION
CONFLICT status, except the INQUIRY, REQUEST SENSE and RELEASE commands.
A RELEASE command is terminated normally, but it has no influence on the TARG #0
reserve right.

TARG

#0

INIT

#A

TARG/INIT

#1

SCSI  Bus

INIT

#B