Date: Thu, 13 Mar 2003 09:18:39 +0200 From: Dmitry Alyabyev <dimitry@al.org.ua> To: Jason Hunt <leth@primus.ca> Cc: Troy Settle <troy@psknet.com>, freebsd-isp@FreeBSD.ORG Subject: Re: Mail Storage Reccomendations (3Ware vs Adaptec vs ....) Message-ID: <200303130918.39407.dimitry@al.org.ua> In-Reply-To: <20030313001532.GA96009@lethargic.dyndns.org> References: <002201c2e703$cabdcdf0$aa8ffea9@abyss> <200303111147.01478.dimitry@al.org.ua> <20030313001532.GA96009@lethargic.dyndns.org>
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On Thursday 13 March 2003 02:15, Jason Hunt wrote: > On Tue, Mar 11, 2003 at 11:47:01AM +0200, Dmitry Alyabyev wrote: > > I can't say about 3Ware but according to experience with Adaptec 21xx > > RAID cards I would say they are _extremely_ slow in case of RAID5. > > RAID 0,1,10 works well and stable > > I found the 21xx's to be *alright* using RAID-5. Rebuilding is > especially slow. A customer at work has a RAID-5 array with four 36GB > drives plus a hotspare, giving them just over 100GB of space. > Rebuilding takes approximatly four hours. According to the Adaptec > knowledge base (Article ID 2077), the 21xx series is slower than other > cards (it mentions the 32xx and 34xx series) due to the lack of a > co-processor for performing XOR operations. when I wrote that I meant not rebuild time but access (especially writing time). in this case adaptec 21xx seems to be slowly than many other RAID-5 cards I seen. -- Dimitry To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isp" in the body of the message
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