Peter Alcibiades wrote:
Question: is there any software which will do a diff at a low level on two cards, the one he sends me, and a new one I generate using Wine? If they are different, we could tell how and maybe even hex edit and correct it. Or I could take an image of both, and is there any way of doing a diff on images?
There will be lots of differences in the images, even between two working cards with the same files due to fragmentation and things like volume ID's. So I am not sure what that would achieve and how you would easily see any corruption to correct.
Is there a specific reason you are using mtools to create the volume rather than mkfs ? Although why there is still an issue after a windows reformat, it does seem to point to a faulty card.