> Is it possible to setup RAID (RAID 1 I think is what I'm after i.e. same
> data gets sent to 2 separate drives simultaneously) across two drives
> where one is internal PATA IDE (and indeed this wil be the drive the
> system boots from) and one is external USB?
Possible - yes. Advisable? Probably not.
If you're just worrying about what drives you currently have, why not set
up a degraded RAID-1 until you can get the disk you want?