Seagate Technology Incorporated

Seagate Technologies, Inc.

David Loh

Myint Ngwe

Ming Jin

Quek Leong Choo

FongKheon Chong

Djohni Chandra

SanYuan Liew

EngHock Lim

MingYou Hu

Chew WengKhin Victor

Gan Kah Liang

A method for monitoring a data storage medium is provided in which a virtual head fly profile is measured. In addition, a data storage device for implementing the monitoring method is provided.

Virtual head fly profile measurement

A motion control system has an enclosed assembly that encloses moving parts. A controller controls a motion of the moving parts and has an inhibit input that inhibits the motion. A sensor provides sensor outputs that depend on an assembly temperature and an assembly humidity in the enclosed assembly. A circuit provides a condensing condition output as a function of the sensor outputs. The condensing condition output couples to the inhibit input to inhibit the motion as a function of the sensor outputs.

Condensation compensation in a motion control system

A method is disclosed for detecting defects in a recordable medium such as a hard disc drive based on error energy. The method may include the steps of writing test data to the medium and reading back the test data. The method may also include the steps of computing an error energy based on the square of the difference between the read back data and an ideal version of the test data and comparing the error energy with an energy threshold. The method generates a defect signal when the error energy exceeds the energy threshold. The method may also be used to identify the media defect according to its error energy profile. An apparatus for detecting defects in a recordable medium is also disclosed.

Method and apparatus for detecting media defects

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Singapore, Singapore

David Loh