alexis@ccnysci.UUCP (Alexis Rosen) (04/14/89)
What is write precompensation? is it some sort of offset used when seeking?
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Alexis Rosen
alexis@ccnysci.{uucp,bitnet}johne@hpvcfs1.HP.COM (John Eaton) (04/18/89)
<<<< < < What is write precompensation? is it some sort of offset used when seeking? ---------- Very simple. Magnetic media systems will distort the signal so that you don't always get back what you put in. If you store a pattern with a narrow pulse of flux in one direction in between two wide pulses of the opposite polarity then the narrow pulse will tend to shrink when it is read. Since this is predictable you can prevent it by writing a much larger pulse than you really want because you know it will shrink down to the proper size when read. John Eaton !hpvcfs1!johne