From mboxrd@z Thu Jan 1 00:00:00 1970 From: jassduec@gmail.com Subject: Re: RAID 5 throughputs Date: Sat, 19 Aug 2006 20:58:20 -0600 Message-ID: <3a1eedb70608191958u2a6af61er36e01ee7d233998a@mail.gmail.com> References: <3a1eedb70608191046o7dd207bfp15f02e90b297b1a9@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Content-Disposition: inline Sender: linux-admin-owner@vger.kernel.org To: Justin Piszcz Cc: linux-admin@vger.kernel.org, linux-config@vger.kernel.org, linux-scsi@vger.kernel.org List-Id: linux-scsi@vger.kernel.org Yeah, infact it is in a PCI-X slot @66Mhz. On 8/19/06, Justin Piszcz wrote: > > > On Sat, 19 Aug 2006, jassduec@gmail.com wrote: > > > Hi All, > > > > I have a storage system with 12 Maxtor 7200 rpm 250GB hard drives in > > RAID 5 configuration with one hot spare. Maxtor claims that each drive > > is capable of providing 56 MB/s sustained throughput. My host system > > is connected to it using 64bit ultra320 Adaptec SCSI card. The host > > system has 3.0 GHz pentium 4 (with HT) processor and 4 GB of RAM > > running linux kernel 2.6.9. I was wondering what order of "maximum" > > sequential read/write, random read/write throughput should i expect > > using them. I am using some of the benchmarking tools like Bonnie, > > Bonnie++, tiobench, dd, iometer etc. However the results from them > > have been very depressing. Theoretically i should be able to achieve a > > read sequential throughput close to min(10*56 = 560, 320) = 320 MB/s. > > However my results are no way close to it. I was wondering if anybody > > can give me some insight of what order of practical throughputs i > > should expect using linux and what other factors may be creating > > bottlenecks. > > > > TIA > > - > > To unsubscribe from this list: send the line "unsubscribe linux-scsi" in > > the body of a message to majordomo@vger.kernel.org > > More majordomo info at http://vger.kernel.org/majordomo-info.html > > > > Is your 64bit ultra320 card in a 64bit PCI + 66MHZ slot? > > If not, you will be limited to 133mb/s. > >