Quote:
Originally Posted by Zeb
HD: 2x400GB Western Digital Caviar SATAII £135.72
Stripe these for extra data security. If one fails the data is backed up on the other.
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Zeb, striping doesn't provide any extra security at all. What striping does is write a portion of the data to each of two discs simultaneously, there's no copy of your data involved and if you lose one disc you're up a brown creek sans paddle. Striping is used to improve the speed of writing data to a disc array.
Mirroring, on the other hand, does provide this security but the backup reduces the usable space to half the capacity of the array. Mirroring and striping can be combined to provide increased write performance and backup but this requires an array of at least 4 (ideally matched) discs (with half the capacity being available).