Hello Tab,

Thank you for your reply, you are absolutely wright !
A few days ago we changed our diskpool from 1 volume of 16 Gb. to 16 volumes
of 1 Gb. This gives a whole lot of difference !! I watched the backup (quite
interesting) the whole
night (didn't go to sleep), and saw that no Media Wait occured. According
the
advice from somebody else in this newsgroup we lowered the high mig
threshold to 50 %.
Now the backuppool gets to a maximum of 80 % Util.

Regards,

Wouter.