Magnetic Peripherals Inc.

Robert A Bremmer

Vladimir Kovner

Dennis C Stone

A method and apparatus for increasing the amount of data capable of being stored in a magnetic storage device is disclosed. Basically, a magnetic characteristic of the disk to head interface is measured at several locations on the disk. The frequency for writing and reading the data is optimized in terms of the required resolution and the magnetic measurement. The read and write modes are then varied, based upon the optimized frequency, such that data is written on the disk at a frequency substantially equal to the optimized frequency and read from a disk having data recorded at the optimized frequency.

Method and apparatus for recording data

A system and method of accurately locating the center of a previously recorded magnetic track on a rotating magnetic storage disk and moving a transducer to the center of the track. The system measures in increments the amplitude of the feedback signal as the transducer is moved to each side of the recorded track and compares the signal amplitude measured with a predetermined reference level. Through the use of an offset measuring system connected to a computer processor the number of increments moved in each direction is recorded and a simple calculation is made to determine the center of the magnetic track. The transducer for recording and replaying information on the disk is then moved to the center of the track.

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Oklahoma City, OK, United States of America

Robert A Bremmer