Working with backup sets : Email message backup sets (Windows) : Restoring an Email message backup set (DS-MLR) : Specifying performance options
 
Specifying performance options
Special performance options on the Select restore performance options page are intended for large backup sets in high performance environments.
• For typical use, keep DS-Client’s default settings, and then click Next to proceed to the next dialog box.
More information in F1 help, see "Select Restore Performance Options (Windows DS-Client)".