Hi, thanks for the reply and info on RAID - i will check out the link.
I want to have a full backup of my mac; files, system files and apps and want to use the 2 external hard drives for 2 copies incase one dies. Incase my mac or hard drive fail i would like a bootable option saved to the drives too. Is this the same thing or are backed up files and a rebootable backup 2 different things? I had queried RAID thinking you could use that to do an automatic backup on both drives.
Can i use Superduper to do the above? If it saves a bootable backup too what kind of backup is this - what i mean is, can this backup and its contents be accessed to get to particular files or does a backup save save one single file only usable when rebooting if a failure occurs? I hope that makes sense?!
I looked at Time machine but i am on 10.4 OS so do you know of any other freeware software that i could use?
Yes, SuperDuper can make bootable backups of your drive. It will be an exact clone of every file, hidden or not. RAID won't do "automatic" backups. Not exactly. RAID mirroring with 2 drives effectively does, but it's not appropriate for your setup.
Time Machine is a different type of backup system, but unfortunately not available for 10.4. It makes incremental, on the hour, backups of your personal files and whatever else you like, but not bootable clones of the whole system. It's a good way to maintain a series of backups of your personal files that you can reach back and recover if, say, you saved changes to a document and 2 months later realized you need the original. You just go back 2 months and grab it.
I use Time Machine, and keep a bootable copy (not a clone) of OS X on a separate partition and on a thumb drive for emergencies. I personally have no need to keep a full clone of the entire system. Anything important I need to recover in the event of a hard drive failure is on my Time Capsule.