On Wed, 16 Sep 2009, Ross Walker wrote:
There is another type of failure that mirrors help with and that is
controller or path failures. If one side of a mirror set is on one controller
or path and the other on another then a failure of one will not take down the
set.
You can't get that with RAIDZn.
Sure you can. Just make sure that 'n' is the same as the number of
data disks, and make sure that each disk in the vdev is accessed via a
unique controller path. Use raidz3 with six disks. You probably need
a lot of vdevs to make this even somewhat cost effective. :-)
Regardless, mirrors are known to be more resilient to temporary path
failures.
Bob
--
Bob Friesenhahn
bfrie...@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/
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