More than one storage partition is required if:

Specific hosts must access specific virtual disks in the storage array.

Hosts with different operating systems are attached to the same storage array. In this case, a storage partition is created for each host type.

You can use the Storage Partitioning Wizard to define a single storage partition. The Storage Partitioning wizard guides you through the major steps required to specify which host groups, hosts, virtual disks, and associated logical unit numbers (LUNs) are to be included in the storage partition.

Storage partitioning fails when:

All mappings are defined.

You create a mapping for a host group that conflicts with an established mapping for a host in the host group.

You create a mapping for a host in a host group that conflicts with an established mapping for the host group.

Storage partitioning is unavailable when:

No valid host groups or hosts exist in the Topology pane on the Mappings tab.

No host ports are defined for the host being included in the storage partition.

All mappings are defined.

NOTE: You can include a secondary virtual disk in a storage partition. However, any hosts that are mapped to the secondary virtual disk has read-only access until the virtual disk is promoted to a primary virtual disk, or the mirror relationship is removed.

Storage partitioning topology is the collection of elements, such as Default Group, host groups, hosts, and host ports shown as nodes in the Topology pane of the Mappings tab in the AMW. For more information, see "Using the Mappings Tab" on page 84.

If a storage partitioning topology is not defined, an informational dialog appears each time you select the Mappings tab. You must define the storage partitioning topology before you define the actual storage partition.

Configuration: Disk Groups and Virtual Disks

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