| US 7,525,751 B2 | ||
| Hard disk drive adapted to detect free-fall and perform emergency parking of read/write head prior to impact | ||
| Jae-hyuk Han, Seoul (Korea, Republic of); Cheol-soon Kim, Anyang-si (Korea, Republic of); Gun-hee Jang, Seoul (Korea, Republic of); and Sang-jin Park, Seoul (Korea, Republic of) | ||
| Assigned to Samsung Electronics Co., Ltd., Suwon-si, Gyeonggi-do (Korea, Republic of) | ||
| Filed on Nov. 13, 2006, as Appl. No. 11/598,075. | ||
| Claims priority of application No. 10-2005-0108525 (KR), filed on Nov. 14, 2005; and application No. 10-2006-0029816 (KR), filed on Mar. 31, 2006. | ||
| Prior Publication US 2007/0109679 A1, May 17, 2007 | ||
| Int. Cl. G11B 21/02 (2006.01) | ||
| U.S. Cl. 360—75 | 16 Claims |
| 1. A hard disk drive (HDD) comprising:
a spindle motor comprising a rotary body and adapted to rotate a disk;
an actuator adapted to move a read/write head to a desired position above the disk;
a flying height sensor adapted to measure in real time a flying height of the rotary body;
a monitor adapted to monitor the measured flying height and generate a free-fall signal when the monitoring determines that
the HDD is in a free-fall state based on at least the measured flying height; and
a central controller adapted to initiate an unloading/parking operation for the read/write head in response to the free-fall
signal.
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