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

Calvin Harrigan charriglists at bellsouth.net
Tue Dec 8 14:50:49 UTC 2009

Johnny Walker wrote:
> 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
> environment.
>  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

Wouldn't a $50 UPS might go a long way in the situation?

More information about the mythtv-users mailing list