Retrospect estimates your tape's capacity to help you manage your backup. To view this estimate, click Backup Sets from the Retrospect Directory's Configure tab. In the backup set selection window, select your backup set and click Configure. The window that appears lists the estimated available space on that backup set's current member.

This estimate is only to help you gauge when Retrospect will request new media. Regardless of the estimated available space, Retrospect uses a member until the tape drive reports the tape is full.

Because DAT drives do not report a tape's capacity dynamically, Retrospect's estimate may be inaccurate. To change the estimate to match your tape's actual capacity (based on your own experience), see "The Options tab" under "Configuring Backup Sets," which starts on page 147 of the User's Guide.