i had in mind something that would make the drive look as much like an old drive as possible, including lying about simply everything, including the underlying physical sector size. surely that's suitable for the PC heritage. On 4 October 2011 13:17, erik quanstrom wrote: > On Tue Oct 4 08:09:55 EDT 2011, charles.forsyth@gmail.com wrote: > > > no, i meant to select what the drive advertises. it would be a bit > > disconcerting if flipping a bit had to reformat a drive! > > well they advertize *two* different sector sizes, a logical size and a > physical size. the drive never changes the physical format, but may > do read/modify/write cycles in the case of writes that don't cover a > full physical sector. > > - erik > >