When you use true RAID and mirror your drive, if one drive dies, the other will just carry on without it and you'll be fine. As far as an error during writing goes, ummmm... not sure what you are talking about? No such error really. If the hard drive incorrectly writes something somehow, it would only occur on that one drive (and it would be an incredible fluke?)
I have 2 HD.. primary one is 40 GB and secondary is 80GB, partioned in 2.. These are not RAIDs.. I use Ghost (I have Norton Systemworks Pro which comes with Ghost).. Basic backup strategy is to just take an image of primary HD to 1st partion of 2nd HD..
I am told by friends who have recovered, that Ghost works like a charm.. However, user interface to backup sucks..
Chief, RAID is good for uptime (ie. if one drive fails then the system continues). But it doesn't replace backups. If you muck up your system by accident, or a virus does so, or whatever...a backup will save your butt. RAID will just make sure you have two copies of it ;-)
Plus when a drive fails, you have to go out and get a new drive and install it and rebuild the RAID...and what if something happens during that time?
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