# Creating Destination Volumes for Snap Snapshots

SnapOPC snapshots use any suitable Snap Data Volume (SDV) whose name is prefixed with a volume label prefix.

If no suitable SDV has a volume label prefix, then the backup job fails. For this reason, if you use SnapOPC, then you must create SDV and Snap Data Pool Volume (SDPV) volumes.

When you create an SDV volume, verify that the SDV volume size is equal to the size of the source volume and that the volume name has a volume label prefix.

To use SnapOPC snapshots or SnapOPC+ snapshots with SDV, complete the following steps:

1. On the array software, create SDV and Snap Data Pool Volume (SDPV) volumes.

2. When you create an SDV volume, verify that the SDV volume size is equal to the size of the source volume.

3. On the Commvault software, specify a volume label prefix snapshot configuration property for the volume name.

Caution

If the snapshot backup job does not find the volume that is specified on the volume label prefix snapshot configuration property, then it fails.

The snapshot backup job also fails if the source volume has SnapOPC+ snapshots with mixed target volumes of type, that is, SDV and TPV. This is the scenario if you already have snapshots with SDVs and then select the Use Thin Volume for SnapOPC/SnapOPC+ snapshot configuration property.

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