| US 7,593,178 B2 | ||
| Method of reducing abrasion of disk by using dithering process and disk drive using the same | ||
| Kyoung-whan Oh, Gwanak-gu (Korea, Republic of); and Bong-jin Lee, Tongyeong-si (Korea, Republic of) | ||
| Assigned to Samsung Electronics Co., Ltd., Suwon-si, Gyeonggi-do (Korea, Republic of) | ||
| Filed on Mar. 07, 2008, as Appl. No. 12/44,173. | ||
| Claims priority of application No. 10-2007-0024677 (KR), filed on Mar. 13, 2007. | ||
| Prior Publication US 2008/0225429 A1, Sep. 18, 2008 | ||
| Int. Cl. G11B 21/02 (2006.01) | ||
| U.S. Cl. 360—75 | 18 Claims |
| 1. A method for controlling a magnetic head of a disk drive, comprising:
determining whether the disk drive is switched to a spindle motor driving mode;
determining whether a spindle velocity is within a predetermined velocity range; and
activating a dithering mode if it is determined that the disk drive is switched to the spindle motor driving mode and if it
is determined that the spindle velocity is within the predetermined velocity range, the dithering mode alternatively driving
the magnetic head in an inner direction and an outer direction with respect to a disk of the disk drive;
determining whether the magnetic head is unlatched from a parking zone of the disk while executing the dithering mode; and
if the magnetic head is unlatched from the parking zone, deactivating the dithering mode and driving the magnetic head to
the parking zone.
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