Quote:
Originally Posted by demolition
The head on an HD drive is narrower than the one in a DD drive so alignment needs to be more accurate for the head to hit the track. This also means that a HD drive will have a hard time rewriting/formatting a disk which was previously formatted in a pure DD drive since it will not be able to overwrite the previous track completely. I am not sure whether this is what you are experiencing though since you seem to have the opposite problem.
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Are you sure you're not thinking about 5.25" DD and HD drives here? There the DD drives were often 40 track with a wider track width..
However 3.5" DD and HD drives are all 80 track, so the track width/density is the same.