ZFS on Hardware RAID controller

[dteske at FreeBSD.org]

Re: JBOD...

I think it's very telling that when Google gives you
the description of JBOD, it actually comes from the
Wikipedia, but ... it doesn't include the [misleading]
statement about the [optional] act of joining the
disks.

Google's Definition:
Just a Bunch Of Disks. A collection of hard disks that
aren't configured according to RAID; A hard disk
enclosure for several disks, especially one lacking a
RAID controller
Source: http://en.wiktionary.org/wiki/JBOD

Definition from 
JBOD (abbreviated from "just a bunch of disks") is an
architecture using multiple hard drives, but not in a
RAID configuration, thus providing neither redundancy
nor performance improvements. Hard drives *may be*
handled independently as separate logical volumes, or
they *may be* combined into a single logical volume
using a volume manager like LVM; such [optionally
combined] volumes are usually called "spanned".[2]

I added the *'s around "may be" and also added the
"[optionally combined]" texts to help clarify that for
you. And I would go on to further say that the LVM
volume manager used to combine the JBOD-access
devices is not part of nor has any relation to said
JBOD access. JBOD is a means of exporting the disks
to the volume manager whose use is optional.
-- 
Devin

_____________
The information contained in this message is proprietary and/or confidential. If you are not the intended recipient, please: (i) delete the message and all copies; (ii) do not disclose, distribute or use the message in any manner; and (iii) notify the sender immediately. In addition, please be aware that any message addressed to our domain is subject to archiving and review by persons other than the intended recipient. Thank you.