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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
4
5
6
7
8
9
10 The SCSI target is already reserved by
11 SCSI Target returns reservation conflict to
12 FibreBridge 2 removes its internal reserve
13 FibreBridge 2 returns reservation conflict to
14 The SCSI target remains reserved by Fibre
Multiple Fibre Channel
Initiators
FC Initiator 1
FC Initiator 2
Fibre Channel
Arbitrated Loop or
Fabric
ATTO FibreBridge 1
SCSI bus
SCSI target
The FibreBridge records the initiator ID (WWN)
in its internal database.
Fibre Bridge 1 sends the Reserve command to
the SCSI target.
The initiator is notified of reservation success:
the SCSI target is reserved.
Fibre Channel Initiator 3 sends the Reserve
command through the SAN to FibreBridge 2.
FibreBridge 2 determines that no reservation
conflict exists at Tier 1.
FibreBridge 2 records the initiator ID (WWN) in
its internal database.
FibreBridge 2 sends the Reserve command to
the same SCSI target.
FibreBridge 1 and rejects FibreBridge 2's
reserve command.
FibreBridge 2.
indicator for the initiator.
Fibre Channel Initiator 3.
Channel Initiator 1.
Multiple FC & SCSI Initiators
FC Initiator 1 FC Initiator2 FC Initiator 3
Fibre Channel
Arbitrated Loop or
Fabric
ATTO FibreBridge
1
SCSI bus
SCSI target
Configuration: multiple initiators
FC Initiator 4
Fibre Channel
Arbitrated Loop or
Fabric
ATTO FibreBridge
2
SCSI bus
66
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