Date: Sat, 31 Jan 1998 17:25:45 -0500 (EST) From: Brian Tao <taob@nbc.netcom.ca> To: Karl Denninger <karl@mcs.net> Cc: current@FreeBSD.ORG Subject: Re: RAID controllers - folks, check this thing out Message-ID: <Pine.GSO.3.95.980131170825.27817a-100000@tor-adm1> In-Reply-To: <19980131155527.19192@mcs.net>
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On Sat, 31 Jan 1998, Karl Denninger wrote:
>
> RAID 5, due to the way it stripes parity across the volumes, has a
> "sweet spot" in performance at 5 spindles.
What "way" is that? On a given stripe, one drive provides the
parity block, the choice of drive staggered across consecutive
stripes. There may be an issue with small, sequential writes on a
RAID 5 set with a large number of drives, but I can't think of any
reason why five drives should be magical.
--
Brian Tao (BT300, taob@netcom.ca)
"Though this be madness, yet there is method in't"
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