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Hmmm
Cannot understand anyone nowadays not running at least a simple raid 1 on their critical systems. The second Hard drives are cheap enough, and most newer computers with their SATA drives don't even need a controller card to accomplish this.
A raid 1 clones every single thing to the second drive mirroring the primary drive..a tad intensive on older systems, but definately worth it for the absolute redundancy.
The primary dies, you always have a perfect copy available.
Of course one of the higher raids accomplish so much more with the added striping(thus higher performance), but rebuilding an array is beyond most people I've found.
Of course for absolutely vital data, removable backups are important too...even the online options are great and affordable.
But a basic mirror at a minimum should absolutely be part of ones security.
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