Detection of asperities in recording surface of storage medium

Details Detection of asperities in recording surface of storage medium Detection of asperities in recording surface of storage medium

1996-06-03

1999-05-04

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

Checking record characteristics or modifying recording...

360 31, G11B 502, G11B 2736

Patent

active

059010010

ABSTRACT:
A tester for use in detecting asperities in a disc surface of a storage system includes a load arm having a proximal end and a distal end. The distal end of the load arm is positioned adjacent the disc surface. A slider is carried on the distal end of the load arm adjacent the disc surface. A thermal sensor is coupled to the slider and provides an electrical output in response to a thermal input due to interaction between the thermal sensor and asperity on the disc surface. Detection circuitry coupled to the thermal sensor detects the electrical output from the thermal sensor and responsively provides a detection output indicating the occurrence of an asperity on the disc surface.

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