On 13/09/20 13:26, Peter Humphrey wrote: > So I'm still left wondering what to do. I'm happy that the hardware isn't on > the blink, anyway.
Can you use gdisk to create a new partition in some empty space on the disk, delete it again, and write a partition table? Basically anything to get gdisk or gparted to actually write a new partition table (that should be the same as the old one, of course). If there are hidden problems that udisk or whatever is picking up on - garbage data somewhere most likely - that's the most likely way of clearing it. Cheers, Wol