Bad/Corrupt Dataflash logs, 60mb of non-stop "ÿÿÿÿÿÿÿÿÿÿÿ"

ArduPlane Plane 3.5
1

So about half of my logs come out ‘corrupted’ for a lack of a better word…

The size of logs usually seem appropriate for the length of flight, but when opened they’re a non-stop string of ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ …

Does this hint to anything?
Are they not saving properly?
Is this some sort of brownout?
Is it because I buy Chinese knock-offs?!

Today my FPV screen went black on final approach… pulled the logs and sadly no data :frowning:

I need data!!!

Landed the bird in one piece thankfully! :slight_smile:

2

If you bought a chinese pixhawk, throw away the sd card they provided and buy a real sd card . Got plenties problems with chinese sd card…

3

@npatzke,
khancyr is definitely right. You get what you pay for with the Chinese clones.
When it comes to recording the dataflash parameters I always use SanDisk micro sd cards since the data recorded on the micro sd card can be crucial to determining what happened during a crash or other hardware failures.
Regards,
TCIII AVD

4

I had the same issue with fast SanDisk card. Formatting card in PC (full format, not that quick one) definitely solved it and everything works as expected since then.

5

Thanks for the replies guys. Will check the brand of SD card, I think it’s the one it came with… I usually do quick format when I pull the SD but i’ll start doing the full format…

Nick