It is generally known that an alignment diskette does not contain data in the true sense of the word, but rather very specific information (signals) to calibrate a faulty drive.

While working with my KryoFlux a thought came to me by chance. How does the data flow of an alignment disk with the KryoFlux actually look like?

The special information is located on tracks 1, 38 and 76 (side 0).

With the KryoFlux these are the tracks 00, 37 and 75.

This test is not intended to be an exact science, I just want to show what the flux looks like on the respective tracks. It is also astonishing that on the CDC disk the shapes look similar. Even the tracks are the same!

All other tracks have the following appearance.

And here for comparison a normal data track of a 360 KByte DOS MFM diskette.