Re: IDE DMA problem [WAS: Re: Getting lousy NFS + tar-pipe throughput on 2.4.20]

[Bartlomiej Zolnierkiewicz]

On Saturday 14 of February 2004 01:16, Timothy Miller wrote:
> I have discovered one major problem that I didn't think to check
> before.  I have never before had trouble using DMA with WD drives, VIA
> chipsets, or RH9, so I didn't think to check before, but hdparm reports
> that DMA is disabled for the disk on the workstation I mentioned in my
> earlier post.
>
> So, I tried this:
>     hdparm -d1 /dev/hda
>
> And I got this result:
> /dev/hda:
>  Setting using_dma to 1 (on)
>  HDIO_SET_DMA failed: Operation not permitted
>  using_dma = 0 (off)
>
> How do I fix this?  Do I have to unmount the filesystem before I can
> change the dma setting?  Why would it be off to begin with?  I know that
> the BIOS is set up right.  Does 2.4.20 not work well with the KT600
> chipset?

It doesn't, upgrade to 2.4.24.

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