Advice on external backup of a Linux server.

[Arthur Pemberton]

Hello,

I'd like to pull on the collective here in posing this question. What's 
the best solution for an unattended backup medium for a Linux server? I 
was looking at a USB externall HDD - but seems to me that the HDD would 
have to be turned on for the backup to done. I also looked at a Network 
Attached Storage (NAS) solution, but these started at $250.

Any on the cheap ideas compatible with FC3?

Thanks