US 12,347,455 B2
Dynamic track pitch in shingled magnetic recording hard disk drive
David R. Hall, Rochester, MN (US); Andrew Larson, Rochester, MN (US); and Zarko Popov, Mission Viejo, CA (US)
Assigned to Western Digital Technologies, Inc., San Jose, CA (US)
Filed by Western Digital Technologies, Inc., San Jose, CA (US)
Filed on Dec. 4, 2023, as Appl. No. 18/528,686.
Prior Publication US 2025/0182791 A1, Jun. 5, 2025
Int. Cl. G11B 20/12 (2006.01); G11B 5/596 (2006.01); G11B 20/18 (2006.01)
CPC G11B 20/1217 (2013.01) [G11B 5/59627 (2013.01); G11B 2020/1238 (2013.01)] 25 Claims
OG exemplary drawing
 
1. A shingled magnetic recording (SMR) data storage device comprising an electronic controller comprising one or more sequences of instructions which, when executed by one or more processors, cause performance of:
writing to a first track of a recording disk at a first track position corresponding to a nominal track width, wherein the recording disk comprises a plurality of zones with each zone pre-sized to a same zone memory size based on the nominal track width based on an expected mean track width across an entire zone of the recording disk;
based on a positional accuracy of the first track writing, determining a second track position corresponding to an adjacent second track of the recording disk; and
writing the second track at the determined second track position.