Lately we have started seeing delays between volumes when backing up our 
Netapp filer.  I have a single AIT-2 tape attached to my F760, and I run 
a full backup of the filer, which contains 3 volumes.  The performance 
on the first volume is as expected, but then there is a delay of 
sometimes up to 12 hours before the second volume begins to be backed 
up!  The same thing happens before the third volume.  volume sizes are 
between 375-480GB.  I think this began after we applied some patches 
lately, but the patch descriptions don't seem to have any bearing on 
this problem.  Had anyone seen this type of behaviour?

Thanks,

Moshe