Backupexe 2010 Backup/verification Backup very slow

Hello,
I have the problem that the verification after backup is extremely langsam.4 X longer than the backup.


've R2 update was not better, R2 to R3 upgrade is not better
of course I have an agent /  remote agent updated

a piece of information:
after rebooting the backup server backup much faster, but after 2 or 3 days again extremely langsam.Überprufung is always extremely slow.

somebody has an idea

thanks in advance
greet