No logs on pixhawk?

ArduCopter Copter 3.4
1

I wanted to review the logs on my pixhawk (running APM 3.4.2) after a flight went awry earlier today…but connecting with mavproxy and running log list reveals:

STABILIZE> log list
Requesting log list
Log 0  numLogs 0 lastLog 0 size 0

Configuration seems sane to me, but I am not an expert:

STABILIZE> param show LOG*
LOG_BACKEND_TYPE 1.000000
LOG_BITMASK      176126.000000
LOG_DISARMED     0.000000
LOG_FILE_BUFSIZE 16.000000
LOG_REPLAY       0.000000

Even setting LOG_DISARMED to 1 does not result in any log files being visible (either via the mavproxy log list command or via “Download logs” in qgroundcontrol). Even after rebooting.

Have I misconfigured something? Or is there something I can poke to get my logs back?

2

Hi Lars,

Have you checked your SD card? Sometimes when it gets full you need to completely erase it for it to work again.

3

@OXINARF, I figured someone would ask :). I should have posted that in theoriginal question. it’s a 4GB SD card with 3.7GB free. I guess if you think it would help I could erase it anyway.

4

I’m not sure if it will fix it or not, but it won’t hurt :slight_smile:

5

That seemed to solve it!

I wonder if there is a way to log write failures (via mavlink messages) so that it’s possible to raise an error in this situation rather than failing mysteriously?

6

The log health status is already reported through MAVLink. I think Mission Planner supports it, not sure about other GCS.

7

@OXINARF, I figured someone would ask :). I should have posted that in
theoriginal question. it’s a 4GB SD card with 3.7GB free. I guess if you
think it would help I could erase it anyway.

If the card has ever been full NuttX has issues with it.