From owner-freebsd-isp Wed Mar 12 23:18:44 2003 Delivered-To: freebsd-isp@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 0E53D37B401 for ; Wed, 12 Mar 2003 23:18:43 -0800 (PST) Received: from relay.kiev.sovam.com (relay.kiev.sovam.com [212.109.32.5]) by mx1.FreeBSD.org (Postfix) with ESMTP id 0690A43FB1 for ; Wed, 12 Mar 2003 23:18:42 -0800 (PST) (envelope-from dimitry@al.org.ua) Received: from [212.109.32.116] (helo=dimitry.kiev.sovam.com) by relay.kiev.sovam.com with esmtp (Exim 3.36 #5) id 18tMzA-0006Cd-00; Thu, 13 Mar 2003 09:18:40 +0200 From: Dmitry Alyabyev Reply-To: dimitry@al.org.ua To: Jason Hunt Subject: Re: Mail Storage Reccomendations (3Ware vs Adaptec vs ....) Date: Thu, 13 Mar 2003 09:18:39 +0200 User-Agent: KMail/1.5 Cc: Troy Settle , freebsd-isp@FreeBSD.ORG References: <002201c2e703$cabdcdf0$aa8ffea9@abyss> <200303111147.01478.dimitry@al.org.ua> <20030313001532.GA96009@lethargic.dyndns.org> In-Reply-To: <20030313001532.GA96009@lethargic.dyndns.org> X-NCC-RegID: ua.svitonline MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200303130918.39407.dimitry@al.org.ua> Sender: owner-freebsd-isp@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org 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