DSD Diags disk found

[Jules Richardson]

Fred Cisin wrote:
> The Dysan Digital Diagnostic Diskette can not be duplicated with an
> unmodified drive, no matter what software or special controller you might
> use. (dd, rawcopy, option board, Match-Point, etc.)

I believe there's a 5.25" version that has various portions that are pure 
analog waveforms, too - you program your controller to read from those 
particular tracks and then observe the waveforms coming off the read head, 
using them to optimise alignment. The 8" version may not have been that 
"sophisticated"...

Either way, copying / archiving is not really an option. Anyone know what 
machine was used to create such disks in the first place?

cheers

Jules