[mythtv-users] Unstable Backend - Full Media Drives but Plenty to Autoexpire

Nick Rout nick.rout at gmail.com
Sun Nov 7 23:00:56 UTC 2010


On Mon, Nov 8, 2010 at 11:54 AM, Michael T. Dean
<mtdean at thirdcontact.com> wrote:
>  On 11/07/2010 02:30 PM, tortise wrote:
>>
>> My mythbuntu 10.04 64 bit backend with a ~100G OS HDD and 2 media 2TB
>> drives I've noticed to start missing recordings, duplicate recordings and
>> have a few crashes.  I've installed apport and managed to submit one so far,
>> that seemed to be to do with time issues.  I upgraded from 23.0 to 32.1
>> thinking that might help.
>>
>> I realise now what is also different is the media drives are now full, but
>> they have 500G of Space Available After Auto-expire.  I am wondering if the
>> problems arise from my expecting mythtv to just do the deletions without
>> issue.  Anyone else experienced similar, or can someone confirm that we need
>> to do the auto deletions ourselves?
>
> MythTV only ever expires shows /after/ starting to record--and /only/ from
> the file system to which it's recording.  It also chooses where to record
> without looking at auto-expire space (based on your selected Storage Group
> Disk Scheduler:
>  http://www.mythtv.org/wiki/Storage_Groups#Storage_Group_Disk_Scheduler ).
>  Therefore, if MythTV is recording to a file system which has no expirable
> recordings, it will fill the drive, and Bad Things Happen.
>
> Also, if your file system is in bad shape--i.e. something you might expect
> from a certain file system

out of curiosity, which one?

> once it's more than 80-some-percent full--it can
> cause problems that could conceivably slow deletion to the point that the
> drive fills up before space is made available.
>
> Also, if your system is unable to expire recordings--due to file system
> permissions or getting "stuck" on a particular recording (this happened for
> a while, at least with 0-byte recordings)--then it won't be able to make
> space to record more.
>
> Mike
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