Compensation for track misalignment due to degradation of HAMR write head

摘要

An offset from track center of data is determined in a data storage device. The data is written to a heat-assisted magnetic recording medium of the device, and the offset compensates for degradation of an optical component of a read/write head when writing the data. The offset is stored in a memory of the storage device. Using the offset, a track alignment is changed during subsequent writes via the read/write head.

主权项

1. A method comprising:
repeatedly determining an offset from track center of data written to a heat-assisted magnetic recording medium of a data storage device via a read/write head of the data storage device, the offset compensating for degradation of an optical component of the read/write head when writing the data, the degradation not affecting a reader of the read/write head; storing each repeatedly determined offset in a micro-jog table that includes parameters to compensate for the effects of skew, a non-volatile memory of the storage device comprising the micro-jog table and a write jog table; during writing, determining a track-specific or zone-specific offset from the write jog table to change a track alignment during subsequent writes via the read/write head using the track-specific or zone-specific offset; and during reading, adjusting a read track alignment based on the micro-jog table and not the write jog table.