i have now tried writing to this SD card with dd from two devices, and no matter what I do it doesn’t erase/replace what’s on it??? i am so confused no read-only errors, just… writes disappear
TIL this MAY be a designed-in failure mode of SD cards — after a certain error threshold, they discard new writes to preserve any extant data
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I've seen this before, and I think this may be the case. Possibly through the SD Card's onboard controller detecting the flash is worn out.
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