And to digress even further... There must be something fundamental about RAID arrays that escapes me. If I understand correctly (and I probably don't) if a hard drive in a RAID fails, you just replace the bad drive and the RAID controller rebuilds the data... unless a second drive fails before the rebuild is completed, at which point all the data in the array is lost.
You can have dual redundancy in a RAID setup as well, so you can have up to two drives fail. But... The fundamental part is that RAID is not a backup solution. It's for live data. I keep my notebook backed up and really important files like photos I further keep duplicate live copy on the RAID and a second backup on my web server. I don't however have the bulk of my RAID array backed up. Though I should.
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