Loss of Tape Space

[dmen]

THis may not be a Backup Exec problem but maybe someone can explain this. I'm running NT4 Server with Backup Exec 9. I have a DLT drive and 40/80GB tapes. I recently did a full backup to one of my RAID volumes. The total amount of files were 57GB. At around 54GB, it asked for another tape. I know I had set the job to overwrite and not to append. It just seems like I got shorted some tape space. Has anyone experienced this? Do you know why? Thanks.

DMen

 

[fraxx]

The native (actual) capacity of the tape is 40 GB, and you've written 54 GB to it. The tape drive compresses data as it is written, but the advertised compression ratio of 2:1 that gives you 80 GB capacity is quite rarely achived on average. Your ratio is 54/40=1.35, which isn't so bad.

Too bad you're just above the tape limit, but you'll just have to live with it.
/charles