Patent ID: 11869546
Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A data storage device comprising:
a disk;
a plurality of read/write heads, each read/write head having a read portion configured to read data from the disk and a write portion configured to write data to the disk, each read/write head comprising:
a read heater disposed proximate to the read portion and configured to thermally adjust a read spacing of the read portion from a surface of the disk;
a write heater disposed proximate to the write portion and configured to thermally adjust a write spacing of the write portion from the surface of the disk; and

a controller configured to:
for each read/write head, control power applied to the read heater and power applied to the write heater based on a dual heater power ratio (DHR) of the respective power applied to each of the read heater and the write heater,
wherein the DHR is set based on a point during touchdown at which a reader shield and a writer shield have maximum contact with the surface of the disk (DHRmax), and wherein DHRmax is determined on a per-head basis.