Date: Sat, 22 Feb 2014 12:25:38 -0800 From: aurfalien <aurfalien@gmail.com> To: freebsd@fongaboo.com Cc: questions@freebsd.org Subject: Re: ZFS on Hardware RAID controller Message-ID: <42536FB2-1641-401A-8196-3428C3B5F17C@gmail.com> In-Reply-To: <alpine.BSF.2.00.1402221521430.44137@helix.wtfayla.net> References: <alpine.BSF.2.00.1402221521430.44137@helix.wtfayla.net>
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Perfect=85=20 =85 letting ZFS do the raid-ing if you will, for you. - aurf "Janitorial Services" On Feb 22, 2014, at 12:22 PM, freebsd@fongaboo.com wrote: >=20 > So I think it's fair to say that there is some ambiguous information = out there about the definition of JBOD. >=20 > So, without worrying about settling the discrepency over nomenclature, = is it correct to say that... >=20 > If I am planning to use ZFS on a machine where the drive controller = happens to be one that can be configured for some combination of = HARDWARE RAID... >=20 > I should configure it so that it does not concatenate/span/combine the = drives in any way at the hardware level. >=20 > I need to configure it as if it wasn't even a RAID controller, but = rather in a configuration where the motherboard/filesystem/OS will = initially see each physical drive as its own volume. >=20 > TRUTH? >=20 >=20 > Thanx >=20 >=20 > FONG >=20 >=20 > On Wed, 19 Feb 2014, dteske@FreeBSD.org wrote: >=20 >> 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. >> --=20 >> 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. >>=20 > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to = "freebsd-questions-unsubscribe@freebsd.org"
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