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Missing data on a file written to SD card

SAKHO
Intellectual 390 points

Hello !

We work with the DM355 running Linux 2.6.32 (Arago project) for making images captures. Images taken from a sensor are written to a file on an SD card.
However, sometimes we  have missing data (some 20KB) at the end of file. This situation typically occurs when writing the last file (last image) on some SD card.

We did mount the SD card as follows: mount -t vfat /dev/mmcblk0p1 /mnt/SD -o async

and at the end of each entry, we call the function sync() to ensure that the data has been transmitted.

So that what could have cause this (Missing data on a file written to SD card)? Someone has an idea to solve this problem?


Thank you in advance

SAKHO