Impossible to read microSD card

djtech@lemmy.world to Linux@lemmy.ml – 33 points –

Hello everybody,

I'm trying to read a (probably damaged) microSD card from my computer (tried with two different computers, both Arch Linux, which can read other card without any problems). There isn't any singal of life (no /dev/sdX, nothing with GParted, testdisk, ...); the only thing that I found was in dmesg. Here's the output of sudo dmesg | rg "mmc0":

Any idea on how to resolve?

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mmc0: cannot verify signal voltage switch suggests something is wrong with the hardware (either SD card or card reader). -110 is a timeout error, and -123 generally indicates a problem with media hardware.

You're not gonna fix this with software. Try a different card reader, or if you think it's the SD card, put a bit of alcohol on a cotton swab and gently clean the contacts. Let the card fully dry, then try again.

Obviously this is a hail-merry shot, but your card is likely physically done for