On Sun, 2013-04-07 at 16:43 -0400, mark wrote: > On 04/07/13 16:22, Frank Cox wrote: > > Floppy disks have a finite usable life. Depending on where and how you have > > been storing them, they may be shot. > > > Yeah, but.... I tried three of 'em, three different OEM, and three ages, > and they all give me fdisk saying it's not a valid block device. If they were all written with the same drive it's also possible the head alignment had drifted which will make things...interesting. Try formatting a scratch floppy to see if you can write. If that works but you still can't read, evidence that it's indeed an alignment mismatch.