Is SD solid enough as primary storage for file system in embedded system ?
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Distribution: K/Ubuntu 18.04-14.04, Scientific Linux 6.3-6.4, Android-x86, Pretty much all distros at one point...
Posts: 1,802
Rep:
There might be several causes;
Could be...
SD quality,... The cards might not be rated fast enough for the file read/write operations
Firmware... The firmware might not support large file transfers (e.g.: some Android kernels)
SD card "spent"... All current SD cards,only support so many write operations before failing to be able to write any longer. Older cards support fewer writes than more modern cards with modern wear leveling techniques.
Or something else entirely, that I haven't thought of...
I'd think some power issue/power quality. Good case for cheap SD cards (cheap controller). Poor connections. EMI/RFI/poorly or ineffective shielding. Temps of system? Just because you have many boards it could still be that as fault or the OS. Wrong settings on how the SD is mounted or speeds or support like dma.
SD cards are used in millions of small systems.
In an odd way, some sd's could be too fast for some OS choices. Could easily be too slow.
Most of these board makers make claims based on some specs like the type and brand of SD even. Contact them maybe for their supported list.
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