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On Sat, 19 Aug 2006, jassduec@xxxxxxxxx wrote:
Yeah, infact it is in a PCI-X slot @66Mhz. On 8/19/06, Justin Piszcz <jpiszcz@xxxxxxxxxxxxxxx> wrote:On Sat, 19 Aug 2006, jassduec@xxxxxxxxx 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@xxxxxxxxxxxxxxx > 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.
What speeds are you currently seeing, r/w?Have you tried making a 3-drive raid5 and increasing it by 1 drive at a time to see if there is any difference in speed?
Justin. - To unsubscribe from this list: send the line "unsubscribe linux-config" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html