On Mon, Nov 17, 2008 at 01:07:12PM -0600, Tim wrote:
>
> So that leads me to my second question then: If I buy a 7410 with a single
> JBOD attached, can I easily attach a second JBOD and grow the pool? It
> would seem the logical answer is "yes", since growing the pool would just
> require adding an/many additional vdev's. Some of the literature seems to
> suggest otherwise though. I can totally understand the issue with adding
> one, or just a few additional disks to the pool, but if you were to double
> the number of disks, in theory, that should be fairly seamless.
Yes, we support adding whole or half JBODs. We do not support adding
individual disks or arbitrarily populated JBODs. If you want the
ability to survive JBOD failure ("NSPF" in our storage config terms),
you must add JBODs in groups (i.e. two at a time in a mirrored config)
so that we can mirror/RAID across them. Even without NSPF, we have
redundant cables, HBAs, power supplies, and controllers, so this is only
required if you are worried about disk backplane failure (a very rare
failure mode).
Can you point to the literature that suggests this is not possible?
- Eric
--
Eric Schrock, Fishworks http://blogs.sun.com/eschrock
_______________________________________________
zfs-discuss mailing list
zfs-discuss@opensolaris.org
http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
