You could try dd'ing a few blocks from /dev/zero onto it.

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On 23 May 2022, 18:56, at 18:56, Chris Bell via GLLUG 
<gllug@mailman.lug.org.uk> wrote:
>Hello,
>I have a MicroSD card that has been used in a RaspbrryPi that appears
>to have
>been corrupted in an attempt to re-use it, and now shows as read only.
>No
>great monetary value, but I could not find any software that appears
>able to
>re-partition any device, whatever its value, once set to read only. Is
>that
>correct, or is this just a dead device?
>--
>Chris Bell
>Website chrisbell.org.uk
>
>
>
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