kirschm wrote:
2) The files on SD-card are already 'natively corrupted'
I am only talking about 2)... and my theory for the root cause is that those corruptions happen, when the camera was e.g. in continious shooting mode... still storing the files on SD... but you start pushing buttons (e.g. menu botton) while the cam is still storing the files.
Can anybody that had problem 2) remember whether he 'disturbed' the cam while it was still storing the files on sd-card?
2) can also happen when the file system on the SD card wasn't properly unmounted ("ejected" or "safely removed") prior the card being removed from a reader / camera with SD card inside being detached from a computer. Broken FAT ("directory" where the information about files and folders is kept) may lead to portions of existing files being overwritten by newly created ones or other wrong things and result in data loss.
The power switches on NX cameras are soft buttons, thus you shouldn't be able to stop the write by shutting down the camera using them (It may happen, though, if Samsung engineers implemented shutdown procedure in a clumsy way...). Neither your theory about buttons being pressed is plausible, as most of the UI is being blocked when the buffer is full and the data is being written to SD card in background.
The only way to corrupt the data in camera (except the one mentioned earlier) when the SD card is logically and physically healthy (i.e. file system is intact and the card is not failing due to flash memory wear etc.) is software crashing or battery being yanked when filesystem is being written to.
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