On 08/12/2017 05:30 PM, Richard Cini via cctalk wrote: > OK, so this is interesting. Since the CW was working using the test > previously described, > > I tried imaging the non-critical disks. None would read successfully. So, I > moved > > everything to the other machine with the better floppy controller and IMD > couldn’t > > do much with them either using the “analyze” option. It read some tracks, but > not all, > > and I got bored after about 30 tracks. They definitely are 512b sectors but > the gap > > lengths were crazy (G1=210 and G2=255).
This is where I'd suspect that the originals were written with a mis-aligned drive. I've run into this myself and have a drive reserved for "tweaking" the alignment. That is, it's not suitable for writing disks as the alignment is fiddled with, depending on requirements. Of course, disks written with a mis-aligned drive will read just fine on the same drive. --Chuck
