Ben Rockwood wrote:
> You want to keep stripes wide to reduce wasted disk space.... but you > also want to keep them narrow to reduce the elements involved in parity > calculation. In light home use I don't see a problem with an 8 disk > RAIDZ/RAIDZ2. If your serving in a multi-user environment your primary > concern is to reduce the movement of the disk heads, and thus narrower > stripes become adventagious. We are currently testing a 22 disk zpool with 2 11 1TB disk wide raidz2 vdevs on a thumper and are seeing it preform very poorly. Why does this configuration increase the movement of disk heads?
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