Specifications

66
Configuration: 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.
1 Fibre 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.
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 InitiatorsMultiple Fibre Channel
Initiators
FC Initiator 1 FC Initiator 2
ATTO FibreBridge 1
SCSI target
Fibre Channel
Arbitrated Loop or
Fabric
SCSI bus