Indicates the type of VSS snapshot to be created.

• 0-unspecified

  If the policy is not configured for Instant Recovery, you can select this option.

  For an Instant Recovery backup, you must select a snapshot attribute of 1 or 2; otherwise, the backup fails.

• 1-differential

  Use a copy-on-write type of snapshot. For example, to back up an EMC CLARiiON array using the EMC_CLARiiON_SnapView_Snapshot method, select differential.

• 2-plex

  Use a clone or a mirror type of snapshot. For example, to back up an EMC CLARiiON array using the EMC_CLARiiON_SnapView_Clone method, select plex.