----- Original Message ----- From: "Jerome BENOIT" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Cc: <[EMAIL PROTECTED]> 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 -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]