[mythtv-users] HD-3000 recording corruption

[Mudit Wahal]

On 3/29/06, Craig Partin <cpartin at gmail.com> wrote:
> > > On 3/29/06, Craig Partin <cpartin at gmail.com> wrote:
> > > > This is the first time I have been stumped in over two years of mythtv
> > > > use.  I got my HD-3000 working just fine tuning QAM stations over
> > > > cable in myth.  The system works flawlessly and reliably except that
> > > > QAM recordings get trashed when anything else is happening on the
> > > > system.  It records beautifully when nothing else is happening.  This
> > > > happens on all channels, HD and SD.  I can playback 1080i content with
> > > > XVMC just fine, even with bob.
> > > >
> > > > Hardware
> > > > MSI K7N Delta-2 lsr
> > > > Avermedia m179
> > > > MX4000 8X AGP
> > > > 512MB memory
> > > > Sempron 2200
> > > > 250GB sata HD
> > > > using onboard sata - also had IDE drive previously.  no change
> > > >
> > > > I have searched here and pchdtv.com and am afraid the answer is going
> > > > to be a new mobo.  I have tried swapping power supplies.  The card has
> > > > its own irq.  I have switched PCI slots, it is currently in the orange
> > > > slot.  I have upgraded to udev and kernel 2.6.15-gentoo-sources-r1.
>
> > On 3/29/06, Mudit Wahal <mwahal at gmail.com> wrote:
> > > Do you see any messages in the logfile such as IOBuffer etc ?
> > >
>
> On 3/29/06, Mudit Wahal <mwahal at gmail.com> wrote:
> > Sorry I meat IOBound messages in the logfile.
> >
>
> No IOBound errors in the backend log.  The frontend just has the ac
> tex damaged, invalid mb errors

Are you running 0.18 or 0.19 ? Also I read somewhere that the SATA
drivers for the older chipset had some issues which was causing file
corruption.

You can use azap to tune to a channel and dump the HD output from the
card to a file directly with and without load. This will eliminate
myth from the middle. You can do vmstat or top and check the iowait%
etc.

I am running 0.18.1 and had IOBound issues while recording and doing
something else (commercial detection/file deletion/etc). But the
IOBound messages were getting logged in the logfile. Had to change
some buffersize etc to get around the messages.
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