On the screen that gives you the result of the Automatic Repair, click on Advanced Options. Do not format it. When booting Linux installation and continuing with just a console, I can see my disks with their size. When the system reboots, third-party drivers signed by the MOK just enrolled will be loaded as necessary. As the writes add up, eventually the storage cells are degraded to the point that they can no longer accept data, and no more writes are possible.
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