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AssigneeInternational Business Machines Corporation
InventorsHal Hjalmar Ottesen, Gordon James Smith
Estimating the term…
Embodiments of systems, methods and article of manufacture provide for readback signal detection and analysis. One embodiment provides an in-situ system to detect envelope traces of a readback signal. Using the envelope data, the presence of undesirable activity and/or storage medium surface conditions may be determined. For example, head modulation may be determined. Upon detection of a modulation event in a sector or a track, the compromised data may be recovered using a signal processing system. Another embodiment provides for detection of a thermal signal component in a readback signal. The thermal signal is processed for surface information indicative of the surface condition. Information indicating a defect may then be used to avoid storage areas having the defects.
A method, comprising:
A signal bearing medium, comprising a sorting program for determining values of a readback signal envelope in order to determine head modulation activity of a head assembly in a disk drive facility wherein the sorting program, when executed by a processor, performs a method, comprising:
An apparatus configured to determine head modulation activity of a head assembly in a disk drive facility, comprising:
Dependencies are inferred from the claim text.