Patent ID: 9177598
Filing Date: 2015-11-03
Classification: G11B

Abstract:
1. A device comprising: a recording medium comprising a servo layer and a data recording layer, wherein the servo layer comprises a first recording head comprising a first side, wherein the first side faces the servo layer and has a first width and a first length, wherein the first width is sized for producing a magnetic field to write servo information on the servo layer, wherein the servo layer comprises a first servo track, a second servo track and a third servo track, wherein a portion of the first servo track is overlapped by the second servo track, and wherein a portion of the second servo track is overlapped by the third servo track; and a second recording head configured to produce a magnetic field to write data on the data recording layer, wherein the second recording head has a second side facing the data recording layer, wherein the second side has a second width and a second length, wherein (i) the second width of the second side is less than the first width of the first side, or (ii) the second length of the second side is less than the first length of the first side.