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–Use free capacity on the same disk group where the source virtual disk resides.

–Use free capacity on another disk group.

–Use unconfigured capacity and create a new disk group for the snapshot repository virtual disk.

–It is recommended placing the snapshot repository virtual disk within the disk group of the source virtual disk. This ensures that if drives associated with the disk group are moved to another storage array, all the virtual disks associated with the snapshot virtual disk remain in the same group.

•Snapshot Repository Virtual Disk Capacity—The snapshot repository virtual disk capacity is expressed as a percentage of the source virtual disk capacity. The maximum percentage allowed is 120 percent.

•Percent Full—When the snapshot repository virtual disk reaches the user- specified repository full percentage level, the event is logged in the Major Event Log (MEL). The default snapshot repository full percentage level is 50% of the source virtual disk.

•Snapshot Repository Virtual Disk Full Conditions—Choose whether to fail writes to the source virtual disk or fail the snapshot virtual disk when the snapshot repository virtual disk becomes full.

•Host-to-Virtual Disk Mapping—Choose whether to map the snapshot virtual disk to a host or host group now or to map the snapshot virtual disk later. The default setting is Map later.

Preparing Host Servers to Create the Snapshot Using the Advanced Path

NOTE: Before using the Snapshot Virtual Disks Premium Feature in a Microsoft Windows clustered configuration, you must first map the snapshot virtual disk to the cluster node that owns the source virtual disk. This ensures that the cluster nodes correctly recognize the snapshot virtual disk.

NOTE: Mapping the snapshot virtual disk to the node that does not own the source virtual disk before the Snapshot enabling process is completed can result in the operating system mis-identifying the snapshot virtual disk. This, in turn, can result in data loss on the source virtual disk or an inaccessible snapshot.

NOTE: For details on mapping the snapshot virtual disk to the secondary node, refer to the Dell PowerVault MD3600i and MD3620i Storage Arrays With Microsoft Windows Server Failover Clusters on support.dell.com/manuals.

Configuration: Premium Feature—Snapshot Virtual Disks

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