Messages in this thread | | | Date | Mon, 05 Nov 2001 11:42:43 -0600 | From | Ryan Hayle <> | Subject | Re: Poor IDE performance with VIA MVP3 |
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On Mon, 05 Nov, 2001 at 04:12:00PM +0000, vda wrote: > Are you saying that hdparm -T -t is yielding wildly varying results? > Looks similar to failing hd symptoms or bug in IDE layer causing retries > after error/timeout. What's in the logs?
hdparm -T (buffer-cache reads) gives good numbers, 43v69 M/sec just now. But that's only mesuring reading from the drive's 2M cache (I believe?). It is the hdparm -t test (buffered disk reads) that is the problem. As I said, I don't receive any errors or retries whatsoever. Everything seems to be working perfectly, just very, very slow...
> Well, I had problems with drives refusing to do [u]dma. > On my home machine I found out that compiling kernel with support for VIA > chipset allowed udma to work ok (hdparm -T -t = ~20mb/s). Without that > support, my hd was stuck in pio, ~6mb/s.
That's the thing--it claims to be in UDMA mode, and again I get no errors. Even when I do 'hdparm -d1 -X66 /dev/hda", everything works fine, without errors, only the speed problems persist. Oh, and I have compiled my kernel with VIA IDE support, it makes no difference in the performance.
It's sounding more and more like this isn't a driver/chipset problem, but something wrong with the HD itself. Thanks for your insight.
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