[mythtv-users] video stutters after changed configuration

[Jarod C. Wilson]

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On Friday 30 January 2004 09:30, David Rees wrote:
> Chris Germano wrote, On 1/30/2004 2:59 AM:
> > I can't believe this is happening, but my video is stuttering slightly.
> > It's not just mythtv, but playback through mplayer also does it. I've
> > changed my hardware setup slightly, and I'm thinking that it's my ATA
> > card that is causing this. It can't handle 4 simultaneous streams it
> > looks like.
> >
> > RAID0 (software) 4x160GB drives
> >
> > Before (worked perfectly):
> > Each had their own channel. 2 drives on a ATA 133 card and the other 2
> > on a ATA 100 drive.
> >
> > Now: (video stutters):
> > All 4 drives are on the ATA 133 card, 2 per channel, maximizing the
> > card. UDMA is of course on.
> >
> > Any recommendations to fix this?
>
> Double check that DMA is on using hdparm.  Keep in mind that anytime you
> start putting 2 disks on one IDE cable and ask to read from both disks
> at the same time (like in the RAID0 setup you've got), you're asking for
> problems.  Go back to your 4-channel setup.

Yeah, copy that. IDE RAID with multiple drives per channel is a no-no.

http://www.tldp.org/HOWTO/Software-RAID-HOWTO-4.html

- -- 
Jarod C. Wilson, RHCE

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