US 12,283,292 B2
Hard disk drive idle sweep for thermal asperity avoidance
Shuntaro Takeuchi, Fujisawa (JP); Masaki Otsuka, Odawara (JP); and Toshiya Shiramatsu, Ebina (JP)
Assigned to Western Digital Technologies, Inc., San Jose, CA (US)
Filed by Western Digital Technologies, Inc., San Jose, CA (US)
Filed on Aug. 1, 2023, as Appl. No. 18/229,144.
Claims priority of provisional application 63/523,073, filed on Jun. 24, 2023.
Prior Publication US 2024/0428829 A1, Dec. 26, 2024
Int. Cl. G11B 33/14 (2006.01); G11B 5/60 (2006.01); G11B 25/04 (2006.01)
CPC G11B 33/1406 (2013.01) [G11B 5/6029 (2013.01); G11B 25/043 (2013.01); G11B 2220/2516 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of avoiding thermal asperities in a hard disk drive wherein a band spans the data storage area of a disk medium, the method comprising:
while in an idle state not performing a data operation,
performing a first seek operation from a particular first one-fifth sub-band position that a head slider is flying over the disk medium to an adjacent second one-fifth sub-band position over the disk medium; and
performing a second seek operation from the second one-fifth sub-band position to an adjacent third one-fifth sub-band position over the disk medium.