enableing udma mode 6 (133)

fobban · n00b Joined: 08 Nov 2003 Posts: 13

Hello. I've been searching the forum for solutions but not found any that tells me how to enable udma mode 6, only how to enable dma. is that the same?

hdparm /dev/hda

fobban · n00b Joined: 08 Nov 2003 Posts: 13

i tried to enable dma now: hdparm -d1 -m16 /dev/hda
the m16 stuff worked but not enableing dma:

(x) · n00b Joined: 04 Nov 2003 Posts: 11 Location: Poland

You can do it using hdparm's option -X (details -> man hdparm).

Try this:
hdparm -d 1 -X udma6 /dev/hda
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CheshireCat · Guru Joined: 25 Aug 2002 Posts: 572

Ummmmm... unless you copied that from an example or somebody else's machine, you already have udma2 enabled on that drive. See the star next to udma6? ;-)

fobban · n00b Joined: 08 Nov 2003 Posts: 13

the info is from my computer

i tried: hdparm -d 1 -X udma 6 /dev/hda and got

CheshireCat · Guru Joined: 25 Aug 2002 Posts: 572

I don't think X is the problem... I didn't notice that your "hdparm /dev/hda" had using_dma=0. That seems odd, because "hdparm -i" looks like it's telling you that you're using udma6. You should have a /proc/ide/via if kernel support for the VIA controller is set up correctly (I do on 2.6, at least). Is there anything helpful in there? It may be that KT600 DMA isn't recognized by current gentoo-sources, or that genkernel didn't enable the option for it correctly.

taskara · Posted: Fri Nov 14, 2003 11:00 pm Post subject: Re: enableing udma mode 6 (133)

taskara · Posted: Fri Nov 14, 2003 11:02 pm Post subject:

and you can't use dma atm probably because you the kernel doesn't have the proper driver for your ide controller.

make sure you have VIA IDE built in directly into your kernel, as well as generic dma support, and make sure you have "DMA for hdd" turned on.
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fobban · n00b Joined: 08 Nov 2003 Posts: 13

thanks for all the replies. i had a long night last night building kernels

after X builds with the gentoo-kernel with no luck i tried the vanilla-sources , and wohoo. works like a charm now

so diskwriting changed from ~4,5 MB/s to ~55 MB/s

the weird thing is that when i booted from the livecd everything worked just fine, and gentoo-sources is nearly identical to the livecd-kernel?

anyhow, problem fixed. and tnx for all support

taskara · Posted: Sat Nov 15, 2003 11:12 am Post subject:

no - gentoo kernel and livecd are totally different

but well done on getting it working

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