On Mar 27, Daniel J Blueman wrote:
> Hi,
>
> Harald Koenig <koenig@tat.physik.uni-tuebingen.de> wrote:
> > is there any chance to get better IDE performace for VIA MVP3 chipset ?
> >
> > I'm using a 40GB 7200rpm Maxtor disk which can deliver ~28 MB/sec,
> > but with my main board (DFI K6BV3+) I only get ~13-16 MB/sec :-(
> >
> > here is some information from kernel 2.3.51 startup and hdparm:
> [snip]
>
> I get the exact same issue. When I benchmark my harddisk under linux, I get
> ~15MB/s under the Intel BX UDMA33 controller, and ~19MB/s under the HPT366
> UDMA66 controller, tested with hdparm -t (hdparm -T gives me >128MB/s).
>
> Now, under Windows 2000, I get 28.2MB/s. All measurements taken from the
> outer recording zone.
>
> Mark Hahn says this is hdparm being a not-so-good benchmark, however, it
> seems it gets quite close to the disk, so it is a nice, pure test, and can
> measure one very important metric. If it was the case that the hdparm was a
> bad test, bottleneck and so on, then why the variation in performance
> between the iBX and HPT366 controller? - certainly not the IDE bus bandwidth
> (as shown by the consistent W2K results).
>
> I'd love to be able to achieve platter speeds without the need for raw I/O
> (well, rawer than what hdparm does, anyway).
>
> Harald - what did you use to do your benchmarks?
my main tool is a modified version of `buffer' which prints time stamps for
every n MB (two separate processes for read/write using large shared buffer).
I get the same performace numbers too when using hdparm/dd/...
Harald
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