!til how to create a list of bad blocks, and how to write all over a disk surface (usually to 'scrub' it, so it's called scrub) which *might* 'refresh magnetisation of bad blocks (I'll create another list after that so I can compare); the first test is 25% done now :(. I also sorted out the 'clone' of the disk with the bad blocks (and Photos backup WIP), and have gone bac…