Yes, it is.  You need to have a device class FILE, and the command is:

backup db type=full dev=file vol=x:\mon.dbb

I have this setup, and daily run a 'delete volhist type=dbb todate= -6'  This
runs before the daily database backup, and frees up that volume name, so the
new backup overwrites it.

Nick Cassimatis
Distributed Storage Management Team
RTP, NC
T/L 444-7302
919-254-7302

If you don't have the time to do it right the first time, where will you find
the time to do it again?