Messages in this thread |  | | | From | vda <> | | Subject | Re: Poor IDE performance with VIA MVP3 | | Date | Mon, 5 Nov 2001 16:12:00 +0000 |
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On Monday 05 November 2001 06:50, Ryan Hayle wrote: > I have a VIA MVP3 (VT82C586B) controller on my motherboard, and am > experiencing extremely poor performance with a Maxtor 20G > (52049U4) drive. It is an UDMA66-capable drive, but I'm only attempting > to use UDMA33 (with an 80-pin cable, as recommended). > > The drive is detected and works just fine, with no errors reported, > however the acces is painfully slow. hdparm -t varries from 970 K/sec to > 2.5 M/sec. (See below)
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?
> The drive is attached by itself to the first IDE channel. On the second I > have a Maxtor 6.8G (90680D4) and a CDROM. hdparm -t on the second drive > typically gives 8-9 M/sec. I manually set this drive with hdparm -X34 > (mdma2), otherwise it generates errors. > > I have tried Linux 2.2.19, 2.4.12, and now 2.4.13, and all exhibit this > same behavior. I was originally running with a 40-pin cable, and switched > it to the 80 to see if it might help, but it had no effect. As some > background information, I was originally running linux off of the second > 6G drive, and opted to move it onto the 20G because it got better > performance. Once I did this, however, the drive started performing > slowly like this, regardless of whether I'm booting to it or the 6G > drive. > > Does this sound like it's just a hardware problem? Has anyone experienced > anything similar to this? Any advice would be greatly apreciated.
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. -- vda - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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