[mythtv-users] IOBOUND errors over NFS - fixed

[Kevin Kuphal]

Darryl Ross wrote:
> Hey All,
>
> I'm just posting this so that it'll end up in the archives in the hopes
> that it might help someone else.
>
> My setup is as follows:
>  - SVN Trunk,
>  - Fedora 4 on all machines,
>  - Tuner-less master backend running on my file server (1.4Tb),
>  - Slave backend with 3 Twinhan MiniTer DVB tuners,
>  - Tuner-less combined frontend/backend.
>
> I've been struggling for about a week trying to fix a problem I've been
> having with getting IOBOUND errors on the tuner machine when either
> recording or watching livetv.
>
> After trying to chase down IRQ conflicts and all sorts of related
> issues, the problem turned out to simply be that the e100 card on the
> tuner machine was running in half-duplex mode.
>
> So, to fix it:
>
> ethtool -s eth0 speed 100 duplex full autoneg off
>
> I was getting IOBOUND errors within seconds of starting a recording, and
>  a two hour recording would end up being about 18Mb. After making that
> change it is now up to 1.2Gb.
>
> Hopefully this will help someone!
>
>   
I added this to a new wiki page that hopefully others can fill in with 
more suggestions:

http://www.mythtv.org/wiki/index.php/Optimizing_Performance

Kevin