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...using a spare 80GB disk (with one of those IDE-to-USB things


This is what I do: I've got 2 external drive caddies, each with a 200Gb disk in. I keep one of them at work, and periodically back up to one of them at home, and then swap them over.

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but I'm just going to run it in JBOD mode.


I'm running my Windows box in RAID0 (striped), for the extra performance, and my Linux box in RAID5, for reliability against single-disk failure. I keep nothing of importance on the Windows box -- it's all saved onto the Linux box, which I then periodically back up to the external disk, or to DVD.
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-- roger