My experience with hugh files that exceed the backuppool is adjusting the
high and low thresholds to a high=85 and a low=70. So far the tape migration
will start when the 85% of the storage is used and the mount point will
remain until the 70% is meet. The default of 15 timeout for the tapes will
allow the backuppool to reach the 85% mark again, therefore sending the
information to tape again.

Knock on wood, but so far I have had no problems with large files.

Joe Cascanette