Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Patent
1986-10-30
1989-03-14
Cardillo, Raymond F.
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
G11B 5596
Patent
active
048129291
ABSTRACT:
A fine position closed loop servo system is disclosed for magnetic disk storage media having a plurality of data storage disks in which a first servo burst is contained on the surface of one of the data storage disks, the servo burst data being spaced at radial positions one-half track displaced from each of the odd-numbered concentric track centerlines and a second servo burst signal is contained on the surface of another of the data storage disks, the second servo burst signal being recorded at radial positions one-half track displaced from the even-numbered concentric track centerlines. Both the first and second servo burst data are read simultaneously utilizing the data transducers associated with the surfaces of the respective data storage disks and the envelopes of each of the servo burst signals are simultaneously, separately detected. The envelope signals thus detected are compared in order to generate a position error signal which is applied to the head actuating mechanism of the disk drive in order to promote and maintain track centerline alignment of an enabled data transducer during operation of the magnetic disk storage means.
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Bhatia Sham P.
Furness Duncan S.
Stewart Alexander
Cardillo Raymond F.
Robertson David L.
Rodime PLC
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