If you selected the option or the option during the creation of a vault store, Enterprise Vault must check that each partition has been backed up before it removes safety copies.
Enterprise Vault check that each partition has been backed up based on one of the following:
The archive attribute of the files on the partition. You can use archive attributes to determine whether a partition has been backed up only if your backup software resets the archive attributes after backup.
A trigger file mechanism. If you backup software does not reset the archive attribute on the files it backs up, you must use this mechanism.
You must choose which method to use for each partition when you create it using the wizard.