Dynamic magnetic information storage or retrieval – Monitoring or testing the progress of recording
Reexamination Certificate
2011-08-23
2011-08-23
Tzeng, Fred (Department: 2627)
Dynamic magnetic information storage or retrieval
Monitoring or testing the progress of recording
Reexamination Certificate
active
08004783
ABSTRACT:
A method for testing a magnetic recording medium includes positioning second magnetic heads in an inspected region of a testing subject medium based on servo information signals. A signal generating step generates a magnetic recording/reproducing signal by making the second magnetic heads to conduct a magnetic recording/reproducing process of the inspected region. A signal processing step inspects the magnetic recording/reproducing signal. A master medium includes a servo information region where servo information is recorded radially from the center in a continuous manner. The inspected region corresponds to regions in the master medium including two or more data information regions adjacent to each other in the same track position via the servo information region. The position of one of the inspected regions in the radial direction is arranged at a different position from that of another of the adjacent inspected regions arranged at a different track position.
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Fujimoto Satoshi
Fujita Jun-ichi
Showa Denko K.K.
Sughrue & Mion, PLLC
Tzeng Fred
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