From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ryan Wagoner Subject: Re: What hardware for RAID5? (PCIe controller or fast onboard) Date: Fri, 20 Mar 2009 09:28:51 -0400 Message-ID: <7d86ddb90903200628k23e10c3cqd53e4c719ea4467e@mail.gmail.com> References: <200903181833.39469.Dexter.Filmore@gmx.de> <873adak6gt.fsf@frosties.localdomain> <49C16362.40006@eyal.emu.id.au> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: <49C16362.40006@eyal.emu.id.au> Sender: linux-raid-owner@vger.kernel.org To: Eyal Lebedinsky Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids I am using an LSI 1068 SAS PCIe controller. I have 7 drives connected and am getting excellent performance. Depending on the layout of the case you can pickup a Supermicro version for less than $100. The issue is the components are mounted on the reverse side for the Supermicro UIO slot, so it takes up two bracket slots on a normal PCIe slot. Ryan On Wed, Mar 18, 2009 at 5:10 PM, Eyal Lebedinsky = wrote: > A word of caution. 6 on-board SATA is not always enough. It is often = the > case > that using all will hit internal bandwidth limits. I find it common f= or 4 > disks > to be handled OK but 5 are too much. > > A simple test of 5 concurrent dd's will tell you if all disks are goi= ng full > speed. > Some time one combination of 5 out of 6 (or 8) on-board sockets will = perform > better > than other and it is worth checking. > > Eyal > > Goswin von Brederlow wrote: >> >> Dexter Filmore writes: >> >>> I want to upgrade server hardware here, currently I have 5 Samsungs= (sATA >>> II) sitting on the onboard controller of an Asus K8N-E Socket754 bo= ard. >>> I guess the controller chips are both connected via PCI hence perfo= rmance >>> isn't really hot. >>> >>> Basically I need either a board with at least 6x sATA-II attached v= ia >>> PCIe or a "dumb" PCIe 4x or 8x controller card. >>> >>> Any recommendations? >>> >>> Dex >> >> Anything that is not pci. PCIe or PCI-X will both be way >> faster. Server boards with 6x SATA-II onboard are hard to miss. And >> any cheap PCIe/PCI-X controler will probably do. >> >> One important thing to think about is hotplug support. Do you need i= t >> or not? >> >> Look for a board and then check out http://linux-ata.org/ for suppor= t. >> >> MfG >> =A0 =A0 =A0 =A0Goswin > > -- > Eyal Lebedinsky (eyal@eyal.emu.id.au) > -- > To unsubscribe from this list: send the line "unsubscribe linux-raid"= in > the body of a message to majordomo@vger.kernel.org > More majordomo info at =A0http://vger.kernel.org/majordomo-info.html > -- To unsubscribe from this list: send the line "unsubscribe linux-raid" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html