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Fibre Channel configuration
Fibre Channel topologies
The D2D appliances support both switched fabric and direct attach (private loop) topologies. Direct Attach (point
to point) topology is not supported.
Switched fabric using NPIV (N Port ID Virtualisation) offers a number of advantages and is the preferred topology
for D2D appliances.
Switched fabric
A switched fabric topology utilizes one or more fabric switches to provide a flexible configuration between
several Fibre Channel hosts and Fibre Channel targets such as the D2D appliance virtual libraries. Switches may
be cascaded of meshed together to form large fabrics.
Fibre Channel, switched fabric topology
Virtual Library 1
(e.g. D2D Generic)
Virtual Library n
(e.g. MSL 2024)
Virtual Library 2
(e.g. MSL 4048)
Host 1 Host nHost 2
Medium
Changer
Tape
Drive 1
Tape
Drive 2
Medium
Changer
Medium
Changer
Tape
Drive 1
Tape
Drive 2
Tape
Drive 3
Tape
Drive 4
Tape
Drive 1
Tape
Drive 2
FC Port 1 FC Port 2
FC HBA FC HBA FC HBA
HP StorageWorks D2D Backup System
Fibre Channel Fabric
The D2D Backup Appliances with a Fibre Channel interface have two FC ports. Either or both of the FC ports
may be connected to a FC fabric, but each virtual library may only be associated with one of these FC ports. By
default, each virtual library will be visible to all hosts connected to the same fabric. It is recommended that each
virtual library is zoned to be visible to only the hosts that require access. Unlike the iSCSI virtual libraries, FC
virtual libraries can be configured to be used by multiple hosts if required.