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 >> > > _______________________________________________ > vdr mailing list > vdr@xxxxxxxxxxx > https://www.linuxtv.org/cgi-bin/mailman/listinfo/vdr _______________________________________________ vdr mailing list vdr@xxxxxxxxxxx https://www.linuxtv.org/cgi-bin/mailman/listinfo/vdr
