From: Adam Kropelin <akropel1@rochester.rr.com>
To: Jeff Garzik <jeff@garzik.org>
Cc: Linux Kernel <linux-kernel@vger.kernel.org>,
Linux RAID Mailing List <linux-raid@vger.kernel.org>,
marc@perkel.com
Subject: Re: Linux: Why software RAID?
Date: Thu, 24 Aug 2006 09:07:41 -0400 [thread overview]
Message-ID: <20060824090741.J30362@mail.kroptech.com> (raw)
In-Reply-To: <44ED1E41.40606@garzik.org>
Jeff Garzik <jeff@garzik.org> wrote:
> But anyway, to help answer the question of hardware vs. software RAID, I
> wrote up a page:
>
> http://linux.yyz.us/why-software-raid.html
>
> Generally, you want software RAID unless your PCI bus (or more rarely,
> your CPU) is getting saturated. With RAID-0, there is no duplication of
> data, and so, PCI bus and CPU usage should be about the same for
> hardware and software RAID.
Hardware RAID can be (!= is) more tolerant of serious drive failures
where a single drive locks up the bus. A high-end hardware RAID card
may be designed with independent controllers so a single drive failure
cannot take other spindles down with it. The same can be accomplished
with sw RAID of course if the builder is careful to use multiple PCI
cards, etc. Sw RAID over your motherboard's onboard controllers leaves
you vulnerable.
--Adam
next prev parent reply other threads:[~2006-08-24 13:07 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-24 3:34 Linux: Why software RAID? Jeff Garzik
2006-08-24 4:22 ` Richard Scobie
2006-08-24 8:19 ` Jeff Garzik
2006-08-24 20:08 ` Richard Scobie
2006-08-24 5:20 ` Chris Friesen
2006-08-24 5:25 ` H. Peter Anvin
2006-08-26 20:55 ` Dan Williams
2006-08-24 5:43 ` Mattias Wadenstein
2006-08-24 13:07 ` Adam Kropelin [this message]
2006-08-24 13:20 ` Alan Cox
2006-08-24 13:36 ` Adam Kropelin
2006-08-24 13:42 ` Gordon Henderson
2006-09-04 17:29 ` Bill Davidsen
2006-08-24 14:55 ` Mark Lord
[not found] ` <44EDB843.2020608@perkel.com>
2006-08-24 15:21 ` Alan Cox
2006-09-04 17:31 ` Bill Davidsen
2006-09-04 17:31 ` Joel Jaeggli
-- strict thread matches above, loose matches on Subject: below --
2006-08-26 3:50 linux
2006-08-26 12:18 ` Raz Ben-Jehuda(caro)
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