Messages in this thread | | | Date | Mon, 27 Mar 2000 11:04:10 +0200 | From | Harald Koenig <> | Subject | Re: VIA MVP3 gives bad IDE UDMA33 performace ?! |
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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 -- All SCSI disks will from now on ___ _____ be required to send an email notice 0--,| /OOOOOOO\ 24 hours prior to complete hardware failure! <_/ / /OOOOOOOOOOO\ \ \/OOOOOOOOOOOOOOO\ \ OOOOOOOOOOOOOOOOO|// Harald Koenig, \/\/\/\/\/\/\/\/\/ Inst.f.Theoret.Astrophysik // / \\ \ koenig@tat.physik.uni-tuebingen.de ^^^^^ ^^^^^
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