Date: Fri, 11 May 2007 16:01:07 +0100 From: Tom Judge <tom@tomjudge.com> To: Randy Schultz <schulra@earlham.edu> Cc: freebsd-performance@freebsd.org Subject: Re: possible issues with Dell/Perc5 raid Message-ID: <46448533.40207@tomjudge.com> In-Reply-To: <Pine.BSF.4.64.0705111041380.38975@tdream.lly.earlham.edu> References: <Pine.BSF.4.64.0705101545340.34925@tdream.lly.earlham.edu> <464474F0.3040306@tomjudge.com> <Pine.BSF.4.64.0705111041380.38975@tdream.lly.earlham.edu>
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Randy Schultz wrote: > On Fri, 11 May 2007, Tom Judge spaketh thusly: > > -}> -- > -}<SNIP> > -}From the boot messages you have included below it seems that you have a Dell > -}SAS-5i (Internal PCIe) controller and not a Perc/5[ie]. > > Tnx Tom. Yeah I knew that but didn't catch it in the Subject: The perc/5 is > on another machine. > > -} > -}The SAS-5 known to have very poor performance (1Mb/s 100%busy) under certain > -}loads (cvsup). > > Hmm. Did not know that. > > Since I have a second machine just like this one, I also think I'm going to > try pulling out the SAS 5i card and going with a software mirror package like > gvinum or gmirror. Given the #'s Bill Moran posted and the horrible #'s you > list above, this may be a viable option. > I have 6 boxes with the SAS5i controller in them so far we have replaced 2 of the controllers with Areca PCIe controllers. However I have yet to test the performance of them (they are supposed to be very good). Tom
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