Heh, you've just discovered the same thing I did.
If you do RAID without the redundancy feature, you are simply increasing your chances that you'll lose all the data to a disk failure. I had it happen to a file server that was configured with three SCSI drives as one big stripe set. Instead of making a more reliable system, I simply tripled my chances for a catastrophic failure.
Lesson learned: If you're going to do RAID, make sure to get that "R" into the equation somewhere.
Fortunately, I had backups. Needless to say, the backups got restored onto a regular single disk drive and the stripe-set idea was tossed out.
The funny thing is, the whole reason I did the stripe set in the first place, speed, turned out to be a non-factor. The stripe set wasn't any faster than a single drive would have been.
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Tony Fabris