US 12,347,453 B1
Wedge repeatable runout correction for interleaved servo patterns in a data storage device
Guoxiao Guo, Irvine, CA (US); Scott A. Ottele, Longmont, CO (US); Richard Conway, San Jose, CA (US); Joey M. Poss, Rochester, MN (US); and Gary Herbst, San Jose, CA (US)
Assigned to Western Digital Technologies, Inc., San Jose, CA (US)
Filed by Western Digital Technologies, Inc., San Jose, CA (US)
Filed on May 1, 2024, as Appl. No. 18/652,260.
Int. Cl. G11B 5/596 (2006.01); G11B 5/55 (2006.01); G11B 17/02 (2006.01)
CPC G11B 17/02 (2013.01) 20 Claims
OG exemplary drawing
 
1. A data storage device, comprising:
a first storage medium surface comprising a first servo pattern;
a second storage medium surface comprising a second servo pattern; and
control circuitry configured to:
apply a first set of wedge repeatable runout correction values to positioning a first head over the first storage medium surface using the first servo pattern; and
apply a second set of wedge repeatable runout correction values to positioning a second head over the second storage medium surface using the second servo pattern, wherein the first set of wedge repeatable runout correction values and the second set of wedge repeatable runout correction values were determined in parallel during a wedge repeatable runout learning operation for corresponding portions of the first servo pattern and the second servo pattern.