Fujitsu MAX3073NC - SCSI,80, Dell DC961,Hard Drive Scsi Logical Interface Specifications page 107

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,
•
INIT #A has an exclusive monopoly over TARG #0.
•
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,
REPORT LUNS, 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,
•
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.
•
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.
•
Commands issued by INIT #B to TARG #0 are rejected with a RESERVATION CONFLICT
status, except the INQUIRY, REPORT LUNS, REQUEST SENSE and RELEASE commands. A
RELEASE command is terminated normally, but it has no influence on the TARG #0 reserve
right.
3. An example of the third party reserve function is applicable when using the COPY command. For
example, TARG/INIT #1 supports the COPY command, uses the COPY command and in the case
that a data transfer between TARG #0 and TARG/INIT#1 is executed, if the third party reserve in 2)
is executed before INIT #A issues a COPY command to TARG/INIT #1, access to TARG #0 by
INIT #B during execution of the COPY command can be prohibited.
C141-C010
3.1 Control/Sense Commands
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