[mythtv-users] HD-3000 recording corruption

[Craig Partin]

On 3/29/06, Mudit Wahal <mwahal at gmail.com> wrote:
> 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.

I am running 0.19-fixes, whatever version is in the Gentoo portage
tree as of the past weekend.  The issue existed under 0.18.1 also.  It
happens with or without myth.  The problem is not really myth related
but this is the most knowledgable group around for these issues. 
There are several similar threads at the pchdtv forums but no answers