Date: Wed, 12 May 2004 10:49:06 +0100 From: Pete French <petefrench@keithprowse.com> To: schweikh@schweikhardt.net, scottl@freebsd.org Cc: freebsd-scsi@freebsd.org Subject: Re: 2120S Stripe - abysmal performance Message-ID: <E1BNqMM-0002EO-Ry@dilbert.firstcallgroup.co.uk> In-Reply-To: <40A13F22.80505@freebsd.org>
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> Read caching should be turned off unless you have a very specific need > for it. Having it on is going to hurt sequential read performance by a > 2x factor. The only time is makes sense is when you have a relatively > small data set that gets read repeatedly, with few other reads mixed in. Interesting comment. Does that refer to this particular controller, to caches on RAID controllers in general, or to caches on the drives themselves ? -pete.
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