Date: Mon, 18 May 2009 20:07:10 -0700 From: Yuri <yuri@rawbw.com> To: Glen Barber <glen.j.barber@gmail.com> Cc: freebsd-questions@freebsd.org Subject: Re: What is the highest hard drive read/write speed you were able to achieve by entire disk mirroring or striping? Message-ID: <4A12225E.6000900@rawbw.com> In-Reply-To: <4ad871310905181337o6c368e14mccccf884f6839737@mail.gmail.com> References: <4A00B3FA.5050905@rawbw.com> <alpine.BSF.2.00.0905060818230.28367@wojtek.tensor.gdynia.pl> <4A11C53C.3090008@rawbw.com> <4ad871310905181337o6c368e14mccccf884f6839737@mail.gmail.com>
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Glen Barber wrote: > No, that is not reasonable (but in a perfect world, would be correct). > > You are limited by the bus speed and controller buffer speed > (whichever is slower). > My motherboard has PCI Express v2.0, that is 500MB/s limitation. Also it has HD/RAID controller Intel ICH10R Southbidge that has peak SATA Data Rate 300MB/s. So this brings me to 300MB/s limit. So 3X harddrives at 85MB/s will still scale. And 4X will already show the limitation. Yuri
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