About snapshot naming convention on the Secondary

The volume name by convention can have a max of 18 characters, one is an underscore (_) that leaves 17 characters. On the Secondary, the snapshots are named uniquely according to a specific naming convention so that it can be easily associated to the specific volumes that we may want to reattach later. The volume name uses the last seven characters of the original volume name and last 10 characters of the data volume name, separated by an underscore. This name is unique to every snapshot.

Note:

Because the XML file name is used for creating a unique snapshot name identifier, Veritas recommends that you have a unique string in the last 10 characters of the file name.

More Information

Creating synchronized snapshots using the VSS Snapshot wizard