[linux-dvb] Re: Suggestion for channel tuning

[Matthias Weingart <matthias@pentax.boerde.de>]

On 24 Apr 2001 ma.hoff@bigfoot.com wrote:

> > I think (k6 2-450 on MSI mobo) that it in my case is related to the fact
> > that Linux disables DMA by default on this mobo chipset (forcing
> > DMA srewed op a hard disk, so I am not going to try again).
> > So maybe the trick here is to use DMA and maybe a mobo that allows it in
> > Linux, that should allow some more data output.
> > On the old mobo I had DMA disabled, and multi sector set with hpparm.
> > And the multi-sector setting made a WHOLE lot of difference (for the better).
> > This is all I understand about it at the moment, just a matter of
> > data throughput.
> > This is only for the 'hickups' in the picture though.
> > Regards
> > Jan
> Is there a way to check this ? I thought if you disable dma - or if linux doesn't support the motherbord chipset it will disable dma - harddisk will run in PIO Mode - right ?

hdparm /dev/hda
tells you what is on or off

It was already discussed here: VDR does not buffer disc-io yet. If vdr
will use a ringbuffer in memory that disc-io problem will gone :-)
But first the whole thing must run with the new API ;-/

        Matthias



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