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@posteo.de wrote:
Hi,
On Mon, 8 Aug 2016 20:30:33 +0200 Matthias Bodenbinder matthias@bodenbinder.de 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