From: jassduec@gmail.com
To: Justin Piszcz <jpiszcz@lucidpixels.com>
Cc: linux-admin@vger.kernel.org, linux-config@vger.kernel.org,
linux-scsi@vger.kernel.org
Subject: Re: RAID 5 throughputs
Date: Sat, 19 Aug 2006 20:58:20 -0600 [thread overview]
Message-ID: <3a1eedb70608191958u2a6af61er36e01ee7d233998a@mail.gmail.com> (raw)
In-Reply-To: <Pine.LNX.4.64.0608191400080.17678@p34.internal.lan>
Yeah, infact it is in a PCI-X slot @66Mhz.
On 8/19/06, Justin Piszcz <jpiszcz@lucidpixels.com> 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.
>
>
next prev parent reply other threads:[~2006-08-20 2:58 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-19 17:46 RAID 5 throughputs jassduec
2006-08-19 18:00 ` Justin Piszcz
2006-08-20 2:58 ` jassduec [this message]
2006-08-20 8:37 ` Justin Piszcz
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