Method and apparatuses for synchronizing writing of data with a pattern of bit islands of media

Abstract

A system includes a detection module, an adjustment module, a phase shifter module, and a write module. The detection module: samples a sensor signal to generate a digital signal; based on the digital signal, detects a pattern of first bit islands on media; and based on the pattern, determines a phase error of the digital signal. The adjustment module generates a second clock signal based on the phase error and a first clock signal. The second clock signal is synchronized with start or end times of the first bit islands. The phase shifter module, based on a predetermined value, adjusts a phase of the second clock signal. The detection module samples the sensor signal based on the second clock signal with the adjusted phase. The write module, based on the second clock signal prior to being phase adjusted, writes data to the first bit islands or second bit islands.