Re: broken recordings

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I tried it, but it did not help. ionice -c2 or ionice -c2. No difference. 

Anyways, I now have a record hook in place which moves finished recordings from SD card to USB drive. SD is now acting like a cache. That works so far.

Thanks
Matthias

Am 10.08.2016 um 21:15 schrieb Stephan Loescher:
> Hi!
> 
> You could also try to start VDR with the highest possible IO priority, e.g.
> ionice -c2 -n0 vdr ...
> 
> That helped some years ago on my old VDR server to ensure, that no other process gets more IO priority than VDR.
> 
> Regards,
> Stephan.
> 
> 
> Am 08/08/2016 um 10:53 PM schrieb Patrick Boettcher:
>> On Mon, 8 Aug 2016 22:51:13 +0200
>> Patrick Boettcher <patrick.boettcher@xxxxxxxxx> wrote:
>>
>>> Hi,
>>>
>>> On Mon, 8 Aug 2016 20:30:33 +0200
>>> Matthias Bodenbinder <matthias@xxxxxxxxxxxxxx> wrote:
>>>
>>>> Hello Christoph,
>>>>
>>>> based on your feedback I made another test. The USB HD performance
>>>> seems to be ok (see my other reply). But anyways I made a test with
>>>> recording directly to the Flash SD card. And that works pretty well.
>>>> 15 min without issue. So it looks like it is indeed an issue with
>>>> USB on the Raspberry PI 2. Any idea how to solve that?
>>>
>>> It _could_ be the write-cache-flush which saturates the bus and then
>>> dramatically decreases I/O of the overall system.
>>>
>>> Try
>>>
>>>      hdparm -W 0 /dev/<partition>
>>>
>>
>> You could also try iotop, which should I/O activity of all processes,
>> maybe there is something going on.
>>
>>      sudo apt install iotop
>>      sudo iotop
>>
> 
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