Method to avoid contact between the head and disk protrusions

Details Method to avoid contact between the head and disk protrusions Method to avoid contact between the head and disk protrusions

2008-06-03

2008-06-03

Tzeng, Fred (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

Reexamination Certificate

active

07382565

ABSTRACT:
A hard disk drive with a controller that controls a movement of a head relative to a disk. The controller causes the head to avoid a defect on the disk during a seek routine. The location of the defect is previously identified and stored in the drive. The drive may create a “no-fly” zone about the defect to insure no contact with the head. The no-fly zone can be avoided by delaying the start of a seek routine, varying the displacement profile of the head or other techniques.

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