On Fri, 17 Dec 2010, Edward Ned Harvey wrote:

Also if a 2nd disk fails during resilver, it's more likely to be in the same
vdev, if you have only 2 vdev's.  Your odds are better with smaller vdev's,
both because the resilver completes faster, and the probability of a 2nd
failure in the same vdev is smaller.

While I agree that smaller vdevs are more reliable, your statement about the failure being more likely be in the same vdev if you have only 2 vdev's to be a rather useless statement. The probability of vdev failure does not have anything to do with the number of vdevs. However, the probability of vdev failure increases tremendously if there is only one vdev and there is a second disk failure.

Bob
--
Bob Friesenhahn
bfrie...@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/
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