B2D duplication slowing down
Backup Exec 2010 R2 running on Windows 2008
Basic situation is that I run 3 jobs. One runs directly to tape and takes around 35 hours. Two other jobs run to B2D and take around 30 hours each.
The 2 B2D areas are on the same disk volume which is internal to the server.
First week I run these I get good duplicarion speed from B2D to tape for both B2D areas. Over subsequent weeks they both slow down. Example for one of them is Week 1 - 3,638 Mb/min over following weeks this goes down to 2,460 to 2,047 to 1,640 and would get slower if I left it.
If I delete all the BKF files (around 300 in each area default 4Gb size) then the cycle repeats Wk 1 fast then slowing down.
I'm assuming that once the BKF files are created then Backup Exec just reuses them rather than delete and recreate with same name so surely disk fragmentation shouldn't be an issue. Once the jobs have run once the number of BKFs only changes marginaly maybe an extra one or two per week.
I could keep deleteing them every 2-3 weeks but would prefer a more permanent fix if possible so if anyone has any ideas?