Specifications

18
Multiple initiators
Multiple Fibre Channel initiators
Multiple Fibre Channel initiators share a Fibre
Channel connection on the SAN with a Fibre Bridge,
and there are no other initiators on the SCSI bus.
1 Fibre Channel Initiator 1 sends the
Reserve command through the SAN to
the FibreBridge.
2 The FibreBridge determines that no
reservation conflict exists at Tier 1.
3 The FibreBridge records the initiator ID
(WWN) in its internal database.
4 The FibreBridge sends the Reserve
command to the SCSI target.
5 The initiator is notified of reservation
success: the SCSI target is reserved.
6 Fibre Channel Initiator 2 sends the
Reserve command through the SAN to
the FibreBridge.
7 The FibreBridge determines the SCSI
device is already reserved.
8 The FibreBridge rejects Fibre Channel
Initiator 2’s command and returns
reservation conflict.
9 The SCSI target remains reserved until a
Release command is sent by Fibre
Channel Initiator 1.
Multiple FC & SCSI initiators
Several Fibre Channel initiators share a Fibre Channel
connection on the SAN
with a FibreBridge,
and several initiators
share the SCSI bus.
1Fibre
Channel
Initiator 1
sends the
Reserve
command
through the
SAN to
FibreBridge 1
for a SCSI
target.
2 FibreBridge
1 determines
that no
reservation
conflict exists at Tier 1.
3 The FibreBridge records the initiator ID
(WWN) in its internal database.
4 Fibre Bridge 1 sends the Reserve
command to the SCSI target.
5 The initiator is notified of reservation
success: the SCSI target is reserved.
6 Fibre Channel Initiator 3 sends the
Reserve command through the SAN to
FibreBridge 2.
7 FibreBridge 2 determines that no
reservation conflict exists at Tier 1.
8 FibreBridge 2 records the initiator ID
(WWN) in its internal database.
9 FibreBridge 2 sends the Reserve
command to the same SCSI target.
10 The SCSI target is already reserved by
FibreBridge 1 and rejects FibreBridge 2’s
reserve command.
11 SCSI Target returns reservation conflict
to FibreBridge 2.
12 FibreBridge 2 removes its internal
reserve indicator for the initiator.
13 FibreBridge 2 returns reservation conflict
to Fibre Channel Initiator 3.
14 The SCSI target remains reserved by
Fibre Channel Initiator 1.
Multiple Fibre Channel
Initiators
FC Initiator 1 FC Initiator 2
ATTO FibreBridge 1
SCSI
SCSI target
Fibre Channel
Arbitrated Loop or
Fabric
FC Initiator 4FC Initiator 1 FC Initiator2 FC Initiator 3
ATTO FibreBridge
1
ATTO FibreBridge
2
SCSI target
SCSI bus SCSI bus
Fibre Channel
Arbitrated Loop or
Fabric
Fibre Channel
Arbitrated Loop or
Fabric
Multiple FC & SCSI Initiators