Promise Technology E610f Bedienungsanleitung PDF herunterladen (Seite 6)

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SAN

Figure 2. SAN topology

VTL Appliance A

VTrak E610f

VTrak J610s

Expansion Unit(s)

VTL Appliance B VTL Appliance C VTL Appliance D

VTrak E610f

VTrak J610s

Expansion Unit(s)

FC Fabric

In a SAN topology (Figure 2), multiple VTL appliances are connected to multiple VTrak E610f units through one or more

Fibre Channel switches (collectively called an FC fabric). Similar to the DAS topology, the capacity of each VTrak E610f

could be expanded using VTrak J610s expansion units through SAS connections.

HA Options for SAN

A SAN topology also provides two levels of high availability options, similar to the DAS topology – at the storage level and

at the VTL appliance level. The difference is the appliances and storage are always connected through the Fibre Channel

switches instead of being directly connected. As illustrated in Figure 2 above, this topology offers completely redundant

paths from all VTL appliances to all storage subsystems, with no single point of failure.

Access Control in a SAN Topology

As the SAN topology places multiple VTL appliances and VTrak E610f units inside the same storage network, it is

important to configure the access control among them properly. This can be either achieved through zoning on the Fibre

Channel switch or through logical unit number (LUN) mapping on the VTrak E610f units. Refer to the section in this best

practices guide entitled “Setting up Access Control” for more details about how to configure the access control between

the VTL appliances and VTrak units.

Best Practices Guide 5

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Promise Technology E610f Bedienungsanleitung Seite 6