Magnetic disk drive and read/write method to reduce read...

Details Magnetic disk drive and read/write method to reduce read... Magnetic disk drive and read/write method to reduce read...

2008-05-06

2008-05-06

Sniezek, Andrew L. (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C360S077020, C360S053000

Reexamination Certificate

active

07369351

ABSTRACT:
Embodiments of the invention reduce the error rate of a read error that is caused by a spacing interval between a write head and a read head, which are formed on a slider. In one embodiment, a write head writes user data, which is placed at a position, on a magnetic disk when a read head is placed at a target position in accordance with a head spacing interval and yaw angle. DHO adjustment data is written at a second position, which is obtained by subjecting the read head to DHO correction in order to read the user data written at the target position. When the user data is to be read, a processor reads the DHO adjustment data, changes the read head position to the first position, and controls the operation of a magnetic disk drive to read the user data.

REFERENCES:
patent: 6687078 (2004-02-01), Kim
patent: 2003/0156347 (2003-08-01), Ishii
patent: 2005/0002121 (2005-01-01), Allen et al.
patent: 11-191274 (1999-07-01), None
patent: 2000-322848 (2000-11-01), None

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