On Sep 16, 2009, at 10:42 AM, Thomas Burgess wrote:
Mirrors are much quicker to replace if one DOES fail though...so i would think that bad stuff could happen with EITHER solution....If you buy a bunch of hard drives for a raidz and they are all from the same batch they might all fail around the same time...what if you have a raidz2 group and 2 drives fail, then you're adding 2 drives back and another fails before it's complete because it takes SO long to resilver? At least with mirrors they resilver fast.
In general, resilver is bound by either the media write bandwidth of the resilvering device or the random IOP capacity of the remaining good drives. Although I don't know of any studies comparing mirrors vs raidz resilvering, I would not expect much difference between
the two, all else held constant. -- richard _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
