[greenbit]

There were those double high density disks that never quite caught on, but one fun thing was having the double hd drive (2.8M) and doing anything that would write to an existing 'regular' (1.4M) floppy -- the drive would write narrower tracks than the existing data, and then when you went to read that sector back, the head would pick up both the new narrow track and the adjacent remainder of the wider track, hilarity ensuing. This led to a certain amount of cursing cheap floppies that weren't really to blame.