My company was burning some microSD cards (4000 of them) and the multi burning machine we were using gives us the option to make the microSD read-only.
I didn't know this was possible, but apparently it flips a binary switch in the microSD card.
We now need to reformat all 4000 of the microSD cards and start fresh. We cannot format them because they are read only. I am not using a SD adapter so the possibility of the lock switch is a non issue.
Gparted cannot format them and running this command:
sudo mount -o remount,rw /media/48EC-B32A
… returns this error:
cannot remount block device /dev/sdb1 read-write, is write-protected
Is there any way to force format these or are they permamantly gone?