Re: [SOLVED] can't set hdparm -d1 and correct kernel config
----- Original Message -----
From: "Jerome BENOIT" <jgmbenoit@wanadoo.fr>
To: <debian-user@lists.debian.org>
Cc: <debian-user@lists.debian.org>
Sent: Wednesday, October 29, 2003 5:47 PM
Subject: Re: can't set hdparm -d1 and correct kernel config
> Finally, did it work ?
>
> Benedict Verheyen wrote:
> >>>>Hi,
> >>>>
> >>>>i have 2 matrox hd disks and whenever i want to set the dma to 1 i
> >>>>get this error: HDIO_SET_DMA failed: Operation not permitted
> >>>>The first is a 40 Gb Matrox IDE and the second a 120 GB Matrox
IDE.
> >>>>They are recent disks (< 1 year). My motherboard is abit b6, intel
> >>>>440bx chipset PIIX4 IDE. lspci reports that it's a intel 440bx
> >>>>chipset (82443 BX/ 82371 EB)
> >>>>
> >>>>A while ago i recompiled the kernel for LVM support and i think i
> >>>>might have excluded something that the kernel needs to set the
dma.
> >>>>What kernel options do i need to have set in order to allow dma=1?
> >>>>
> >>>>Thanks.
> >>>>Benedict
> >>>
> >>>>>Use this command to see what kernel options there are and what is
> >>>>>selected in your kernel config file located in /boot.
> >>>>>'cat /boot/config-<kerel version> |grep DMA'
> >>>>>- --
> >>>>>Greg Madden
> >>>>
> >>>I did this and the only options that were set are
> >>>CONFIG_BLK_DEV_IDEDMA_PCI=y
> >>>CONFIG_BLK_DEV_IDEDMA=y
> >>>All the others are specified as "is not set"
> >>>So it seems as if dma is allowed here.
> >>
> >>Try also to grep for BLK_DEV. I think, in your case, it would be
> >>CONFIG_BLK_DEV_PIIX.
> >
> >
> > Ha! that might be it! cat /boot/config |grep CONFIG_BLK_DEV_PIIX
> > returns # CONFIG_BLK_DEV_PIIX is not set
> >
> > I will try to recompile a new kernel with this option set.
> >
> > Thanks
> > Benedict
I just recompiled a new kernel with CONFIG_BLK_DEV_PIIX set.
Now the DMA works like a charm. Tripled my speed.
Thanks to Ron Johnson for the suggestions!
Regards,
Benedict Verheyen
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