On Aug 21, 2009, at 5:46 PM, Ron Mexico <no-re...@opensolaris.org>
wrote:
I'm in the process of setting up a NAS for my company. It's going to
be based on Open Solaris and ZFS, running on a Dell R710 with two
SAS 5/E HBAs. Each HBA will be connected to a 24 bay Supermicro JBOD
chassis. Each chassis will have 12 drives to start out with, giving
us room for expansion as needed.
Ideally, I'd like to have a mirror of a raidz2 setup, but from the
documentation I've read, it looks like I can't do that, and that a
stripe of mirrors is the only way to accomplish this.
Why?
It uses as many drives as a RAID10, but you loose 1 more drive of
usable space then RAID10 and you get less then half the performance.
You might be thinking of a RAID50 which would be multiple raidz vdevs
in a zpool, or striped RAID5s.
If not then stick with multiple mirror vdevs in a zpool (RAID10).
-Ross
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