On my server, we just do a mass copy to the spare drive..
That's UNIX though...
At school, on NT, we backup using ArcServe 6.something.. Works for us - few problems *knock on wood*.. (As long as the damn tape drive is working - we been having trouble lately..)
This isn't really a UBB issue, so it doesn't strictly belong here, but I'm leaving it in this forum for lack of a better place..
Graeme