Patent ID: 8593748
Filing Date: 2013-11-26
Classification: G11B

Abstract:
1. A shingled magnetic recording disk drive comprising: a magnetic recording disk having a recording surface with a plurality of concentric shingled data tracks arranged in annular bands separated by annular inter-band gaps, each band having a boundary region of tracks adjacent a gap, whereby each gap is located between adjacent boundary regions, the recording surface also having an extended cache region comprising a plurality of concentric data tracks separated from the data bands; a write head associated with said disk surface for generating a magnetic write field to write data to the tracks; a read head for reading data written in the tracks; a controller for controlling the writing of data by the write head to the tracks; and memory coupled to the controller and containing a program of instructions readable by the controller for minimizing the effect of encroachment of the write field on tracks in a band when data is being written outside the band, the program of instructions undertaking the method acts comprising: