Hi,

> How can i tell amanda to split it up in 4500MB slices and write them one
> by one to DVD-RAM?

Make them several DLEs. That means you must use GNU tar, not dump and
you must identify sub-hierarchies, from that too big disk, that will
match your 4.5 GB limit. Time to play with exclude file list.

That said, your tapelist shows 4350 MB, why making chuncks of 4500MB?
You may well be facing the same problem again...

Bests,

olivier