Data storage device extending servo burst field by alternating servo field processing during writes

A data storage device comprising:

• a disk comprising a plurality of servo tracks and a plurality of data tracks defined by the servo tracks, wherein:
• each servo track is defined by a first set of servo sectors interleaved with a second set of servo sectors;
• each servo sector comprises a servo burst field;
• and
• the servo burst field of the first set of servo sectors has a first length and the servo burst field of the second set of servo sectors has a second length longer than the first length;
• a head actuated over the disk;
• and
• control circuitry configured to write data to a first data track by:
• reading at least one of the second set of servo sectors and skipping the read of at least part of one of the first set of servo sectors;
• servoing the head over the first data track in response to reading the second set servo sector;
• and
• writing the data to the first data track.