A disk drive is disclosed including a disk having a plurality of tracks, and a head actuated over the disk. A refresh monitor is maintained for refreshing data stored on the disk. A need for a refresh operation is detected when the refresh monitor exceeds a first threshold, wherein the refresh operation is deferred based on an environmental condition.

 
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< Multi-ridged subwavelength aperture for optical transmission and thermally assisted magnetic recording

> Temperature-adaptive open-loop control of active latch

> Data read retry with read timing adjustment for eccentrity of disc in data storage device
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