On Thu, Mar 25, 2010 at 11:47 AM, Bruno Sousa <bso...@epinfante.com> wrote:
> What do you mean by "Using fewer than 4 disks in a raidz2 defeats the > purpose of raidz2, as you will always be in a degraded mode" ? Does it means > that having 2 vdevs with 3 disks it won't be redundant in the advent of a > drive failure? > raidz1 is similar to raid5 in that it is single-parity, and requires a minimum of 3 drives (2 data + 1 parity) raidz2 is similar to raid6 in that it is double-parity, and requires a minimum of 4 drives (2 data + 2 parity) IOW, a raidz2 vdev made up of 3 drives will always be running in degraded mode (it's missing a drive). -- Freddie Cash fjwc...@gmail.com
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