If you select the option or the option, Enterprise Vault must check that the partition has been backed up before it removes safety copies.
During the creation of each vault store, you chose from the following options:
. Files on the partition whose archive attributes are cleared are considered backed up and Enterprise Vault removes the corresponding safety copies. This option is appropriate only if your backup software clears archive attributes after backup.
. A partition is considered backed up when Enterprise Vault finds a trigger file on the partition. Typically, this trigger file is placed on the partition by your backup software. When you choose this option, you can also configure how often the partition is checked for the presence of a trigger file
You can change this setting subsequently in the Administration console.
To configure which method Enterprise Vault uses to ensure a partition's data is backed up
In the left pane of the administration console, expand the Vault Store Groups container and select the vault store contains the partition.
In the right pane, right-click the partition and click Properties.
If you selected the Check for a trigger file option, you can also set a partition scan interval, which determines how often Enterprise Vault checks the partition for a trigger file. Select the Scan partition every option and set a scan interval in minutes.