We've been running a few large (>20GB) volumes with no problem, but those volumes have a manageable number of files in them. Our backup medium is 100/200/400GB LTO-2 tape. Recently, one of our researchers created a 40GB volume that has 5.5 million small files in it. The dump transaction for this volume has been running for 23 hours so far and looks like it might take another day. ---Bob.