Method for recovering data from disk with magneto-resistive head

Details Method for recovering data from disk with magneto-resistive head Method for recovering data from disk with magneto-resistive head

1996-10-15

1999-06-29

Faber, Alan

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data verification

360 65, 360 46, 360 67, 360 66, 360 51, 360 7708, 360 25, G11B 509

Patent

active

059176709

ABSTRACT:
Momentary contact with a defect site of a data storage disk or free particle by a magnetoresistive read element of a flying head causes momentary heating and unwanted increase in element resistance (thermal asperity) which can disrupt hard disk drive data reading operations. Since the disk carries a predetermined data format, the disk drive controller correlates location of a thermal asperity to the format and thereupon selects from several available thermal asperity recovery methods a method most likely to minimize thermal asperity effect upon disk drive operation during rereading of data at the thermal asperity location.

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Data Sheet, VM6130 Magneto-Resistive Head, High Performance, Read/Write Preamplifier, VTC Inc., Aug. 1996.
Data Sheet, SSI 32R1510BR MR Head Read/Write Device, Silicon Systems, Dec. 1993, copyright 1994.
"Disk Drive Interface Guide", Mass Storage Handbook, Chapter 9, pp. 9-3 through 9-158, National Semiconductor Corporation, copyright 1989.

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