US 12,266,388 B1
Magnetic recording and reproducing device and adjustment method of the same
Takao Furuhashi, Kanagawa (JP); and Kaori Kimura, Kanagawa (JP)
Assigned to Kabushiki Kaisha Toshiba, Tokyo (JP); and Toshiba Electronic Devices & Storage Corporation, Tokyo (JP)
Filed by Kabushiki Kaisha Toshiba, Tokyo (JP); and Toshiba Electronic Devices & Storage Corporation, Tokyo (JP)
Filed on Mar. 4, 2024, as Appl. No. 18/594,478.
Claims priority of application No. 2023-158269 (JP), filed on Sep. 22, 2023.
Int. Cl. G11B 5/60 (2006.01); G11B 5/012 (2006.01); G11B 5/02 (2006.01); G11B 5/455 (2006.01); G11B 5/00 (2006.01)
CPC G11B 5/607 (2013.01) [G11B 5/012 (2013.01); G11B 5/02 (2013.01); G11B 5/455 (2013.01); G11B 2005/0021 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method of adjusting a magnetic recording and reproducing device incorporating a heat-assisted magnetic recording head and a magnetic disk, the method comprising:
performing a first write operation by the heat-assisted magnetic recording head, at a first position on a recording surface of the magnetic disk;
seeking the heat-assisted magnetic recording head to a second position different in radial position from the first position on the recording surface, and measuring a first error rate;
performing a second write operation at the second position and then measuring a second error rate at the second position;
calculating a first difference between the first error rate and the second error rate;
seeking the heat-assisted magnetic recording head to the first position and measuring a third error rate;
performing a third write operation at the first position and then measuring a fourth error rate at the first position;
calculating a second difference between the third error rate and the fourth error rate; and
comparing the first difference with the second difference and determining a change in flying height between the first position and the second position.