Toralf Lund wrote:

Jon LaBadie wrote:

On Tue, Jun 13, 2006 at 02:46:31PM +0200, Toralf Lund wrote:

Normally I would agree, but I have to back up 3Tb of data organised as one single volume. The only "simple" option would be to have one 3Tb tape as well, but such a thing isn't available (to me at least.)

Toralf,
perhaps I'm being dense, but why isn't your situation satisfied by
the current tape-spanning.  I'm envisioning something like lto-2
or lto-3 drives and using no holding disk but sufficient buffer
space.  If your data compresses to say 1.6TB with the 400GB lto-3
tapes, a setting of runtapes 5 or 6 will accept an entire level 0

dump with only part of the final tape wasted.

Well, like I just said in another post - maybe I worry to much, but I'm a bit concerned about dumping 5 or 6 tapes during one run and nothing during others, based in timing/system load considerations. It just seems nicer to spread the work as evenly as possibly across runs...

- T