[mythtv-users] Firewire recording glitches

[Deyan]

On Wed, Jun 16, 2010 at 2:54 PM, Yeechang Lee <ylee at pobox.com> wrote:
> Deyan <mythtv at bektchiev.net> says:
>> I'd appreciate if someone has any idea or if you think it is a bug in
>> the Firewire recorder.
>
> I don't see IOBOUND errors in the logs so the issue does not appear to
> be the recording disks/mythbackend being overloaded and dropping
> data. Assuming that FireWire recordings seem otherwise reliable, you
> likely don't have one of the problematic chipsets.

No, I don't think it's I/O issue since I have a separate disk that has
the DB and the root partitions and at the time there was only one
recording going on.

>
> It is likely a simple signal issue. If the issue happens often with a
> certain channel, if possible watch the channel directly during
> recording (by connecting the component jacks on the cable box to the
> display), and see if the glitches occur there too. Make sure all coax
> cable connections are tight and in good condition, and if necessary
> request a cable-company technician test the signal strength and
> quality.

I've done this in the past and I've looked at the channel while the
recording is in progress connecting my TV to the cable box via HDMI
and the picture was flawless so I don't think it's signal quality.

> I've seen this happen occasionally over the past 4.5 years of
> recording with FireWire. It varies by channel; for example, there was
> a period of about a month during which HBO HD, and only HBO, saw
> frequent dropouts, and recently, ESPN HD, and not ESPN2 HD or another
> channel, had very bad dropouts for a couple of days.

Funny you should say this since these dropouts from this morning are
exactly with ESPN HD... But the earlier recording was also on ESPN HD
and it didn't have them while the second and third of the day did (all
of the World Cup games). Yesterday I didn't watch any of the
recordings but the day before yesterday there were no dropouts at all.

Deyan