[OT] If RAID's not backup... what do you use?

[John Robinson <john.robinson@anonymous.org.uk>]

I currently have a 3x1TB RAID-5 array. It contains backups of my other 
machines, taken with rsync. It's my central filestore, rsync'ed locally 
so I have previous editions. It also holds my media archive, and in 
particular my music collection that I really don't want to have to rip 
again. So while part of it is backup for other systems, part of it needs 
backed up. I'd like some means of coping with fire or theft of the 
server. I want something with some room to expand, which can do the 
whole job unattended. So what would the storage professionals here 
recommend? Tape autoloaders big enough to cope with >2TB seem stunningly 
expensive to me; even the tapes are as expensive per GB as hard drives...

Thanks in advance,

Cheers,

John.