
Figure 14 Zoning between VSMs and first quad of a DPM pair
.
VSM-storage zoning
A VSM-Storage back-end zone is used to give the VSM access to the ports of the back-end storage
device to manage the storage being virtualized by SVSP, and facilitate data mover functions involving
the “soft path” such as mirroring, local snapshots, and remote replication. A back-end path between
the VSM and the storage device consists of a single port on the VSM and a storage device port. In
this type of zone, the VSM acts in the initiator role. Each VSM port is zoned to all storage device
ports on a given fabric. A VSM-Storage zone may contain a single VSM port and multiple storage
device ports. The VSM server is limited on the total number of access paths that can be exposed to
back-end LUNs. The restriction is set according to the capabilities of the OS that runs the VSM
(Windows 2008). However, there is a limitation on the number of back-end LUNs that can be presented
to the VSMs. See the product release notes for the maximum number of back-end LUNs supported by
HP SVSP. Each zone has a single VSM back-end initiator port and multiple storage device target
ports.
Figure 15 illustrates zoning between VSMs and a dual, dual-port controller back-end storage device.
This can be extended for storage devices with more ports by adding them to the existing zones. Paths
between the storage device target ports and VSM initiator ports are color coordinated to represent
the different zones to which they belong within the red and blue fabrics.
Figure 15 Zoning between VSMs and two dual-port back-end controllers
.
Enterprise Virtual Array Cluster Administrator Guide 43
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