Patent ID: 8699162
Filing Date: 2014-04-15
Classification: G11B

Abstract:
1. A shingled magnetic recording disk drive comprising: a magnetic recording disk having a recording surface arranged in a plurality of annular zones, each zone having a plurality of concentric shingled data tracks containing data sectors, the recording surface also having a plurality of servo sectors containing position error signal (PES) fields extending generally radially across the shingled data tracks; wherein each zone has a unique number of error correction code (ECC) sectors associated with a block of data sectors; 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 and for detecting the PES fields; an actuator for moving the write head and read head to selected tracks; servo electronics for decoding the PES fields into PES values; 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 determining the zone in which to write data, the program of instructions undertaking the method acts comprising: