Verifying backup on Tru64

Hy everyone and happy new year!

I would like to know how can i verify that some of my backup tapes, created with vdump, are ok?
Some of them were created before i came to the company that i'm workin for now, so i would like to test them before i actually use them. Unfortunately, i don't have any test machine (real or virtual) to use them on.
Is there a way to simulate the restore process or the command which could be helpful but which wouldn't affect the filesystem?

Tnx in advance!