Lubricant depletion detection in a self-healing disk drive

Details Lubricant depletion detection in a self-healing disk drive Lubricant depletion detection in a self-healing disk drive

2005-05-31

2005-05-31

Tran, Sinh (Department: 2651)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

C360S075000

Reexamination Certificate

active

06900957

ABSTRACT:
A method and apparatus for detecting lubricant depletion in a disk drive is provided. Disk operation performance parameters are monitored for each of a plurality of zones on the surface of the disk and stored. Examples of performance parameters include dwell time, flying height changes, and data recovery measurements. The performance parameters are compared against predetermined threshold values. If the performance parameters exceed the predetermined threshold values for any of the zones, a potential lubricant depletion or other general degradation problem is flagged for the corresponding zone. Optionally, when a potential lubricant depletion problem is flagged for a particular zone, corrective action is taken. Examples of corrective action include moving recently accessed data from the flagged zone to a zone not identified as having a lubricant depletion problem, moving older archival data to the flagged zone, and/or removing access to the flagged zone.

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