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Re: SSD Memory Card (was The Raspberry Pi that Took a Day Off.)



On Thu 27 Jan 2022 at 16:58:01 (-0600), Martin McCormick wrote:
> Charles Curley <charlescurley@charlescurley.com> writes:
> > I'm no expert on RPis, but that sounds to me like the SD card is
> > protected against writes. Check for any physical write protection
> > switches on the card itself and the holder.
> 
> Thanks for the suggestion, but this is one of those SSD cards
> that often is found in a camera and resembles a wafer the size of
> a thumbnail.  It has a projection that acts as a key way to keep
> a user from inserting it in the wrong way and there is a groove
> for a fingernail to help pull the chip out of the socket.  This
> particular one was reading and writing just fine until I bricked
> it by the DD that must have overwritten some address which now
> makes it unwritable.  It went from good to bad without my
> removing it from the card reader so there should be some way to
> at least clear it for writing again.
> 
> 	Apparently, it stops being writable if the partition
> table is corrupted.  In my case, I just want to delete both
> partitions and start over.
> 
> 	The OS is debian Buster and has all the tools you can
> expect to find and runs on a 64-bit ARM.  Otherwise, it's pure
> debian Linux.

I've not heard of that problem. You were prevented from zeroing the
entire device, which would have wiped the partition table anyway.

What I would want to check is that the OS isn't doing something
stupid, like trying to automount it, failing, and consequently
setting the device readonly. By OS, I really mean DEs, or
automounters in general.

You could also try zeroing it in another machine, ± any adapters
required. (Bear in mind that adapters do have readonly sliders.)

Cheers,
David.


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