[mythtv-users] Mythtv FE in a frequent power loss environment

Johnny Walker johnnyjboss at gmail.com
Tue Dec 8 14:40:46 UTC 2009

On Tue, Dec 8, 2009 at 7:35 AM, Ronald Frazier <ron at ronfrazier.net> wrote:
>> So is it ideal to go for a diskless frontend (nfs mounted backend)?
>> What happens when FE is alive and a power failure occurs, will it
>> corrupt the backend filesystem.
> My diskless frontend has lost power several times and never suffered
> any ill effects from it. It would be impossible for it to corrupt the
> filesystem, as the integrity of that would be the responsibility of
> the nfs server machine.

Wow - I'd like to pick your brain on NFS settings if you've never had
an issue with NFS and data loss especially in a power failure

 It's possible that if it lost power in the
> middle of modifying a file, that file could be in a corrupt state.
> However, with a dedicated frontend, that's generally not an issue.
> Mostly all it will be touching are log files (no big deal if they get
> "corrupted"). It generally shouldn't be modifying any config file
> (unless you've got some sort of auto-update running).
> One issue that existed under 0.21 was if the frontend lost power while
> in LiveTV, the tuner would forever be stuck in livetv mode, and
> recordings would be missed. The only fix was to restart mythbackend.
> I'm unclear whether or not this issue has been fixed in 0.22 or not.
> The ticket (http://svn.mythtv.org/trac/ticket/2960) was closed because
> nobody reported having a problem. However, I didn't see anybody report
> testing that it was successfully fixed, and I didn't see any related
> patches that would have fixed it.  It's possible some other fix took
> care of it inadvertantly, or it's possible its still there and nobody
> noticed stuartm's request for reproduction.
> This is the only potential problem I'm aware of.
> --
> Ron
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