Floppy Disk Servo Using Opposite Side Tracking
Original Publication Date: 1985-Jun-01
Included in the Prior Art Database: 2005-Feb-18
To achieve significantly higher track densities in floppy disk drive systems, a servo system is required. The ideal servo system would be one which did not add any additional hardware to the existing floppy disk system, and which used the existing diskette. Other than the addition of servo electronics, the disclosed system accomplishes this. It utilizes the conventional floppy disk drive and the conventional floppy disk. A standard floppy disk and a standard two-sided floppy head are used. The basic concept is that as one of the heads is reading and writing data, the head on the opposite side of the disk is being used as a servo head. See Fig. 1A. The servo information is not a special field laid down just for servo control but uses the existing bit pattern from those areas on each track which are never rewritten, i.e.