Abstract: A disk drive is disclosed comprising a disk, and a head actuated over the disk, the head comprising a read element radially offset from a write element. A temperature is measured, and an operating write offset is generated based on the measured temperature. Data is written to a target radial location on the disk by radially offsetting the write element based on the operating write offset. An operating read offset is generated based on the target radial location on the disk, and the data is read from the disk by radially offsetting the read element based on the operating read offset.

Abstract: Determining the extent of thermally-induced expansion of media of a storage device. A controller may write a second signal on a number of ID and OD sideband tracks of the media immediately adjacent to a center track on which a first signal is written; calculate a jog offset range based on the number of ID and OD sideband tracks; over the calculated jog offset range, read the second signal at a first temperature and at a warmer second temperature and determining a jog value for each of the sideband tracks from a quantity related to the read second signal at the first and second temperatures; and compute a jog delta between the jog values at the first and second temperatures for each of the sideband tracks, which indicate the extent to which thermally-induced media expansion affects a position of the sideband tracks relative to the center track.