Systems and methods for memory efficient repeatable run out processing

摘要

Various embodiments of the present invention provide systems and methods for low overhead disk wobble compensation. As an example, a method for performing synchronous wobble compensation processing is disclosed. The method includes providing a medium that includes a servo data region and a user data region. The servo data region includes a clock recovery pattern and a location pattern. A detectable pattern is written to the user data region a known number of bit periods from the location pattern. The detectable pattern is read back, and a fractional processing delay is calculated. Based at least on the fractional processing delay and a known number of bit periods from the location pattern to the end of the servo data region, a wobble compensation pattern is written an integral number of bit periods from the location pattern.

主权项

1. A method for performing synchronous wobble compensation processing, the method comprising:
providing a medium including a servo data region and a user data region, wherein the servo data region includes a clock recovery pattern and a location pattern; writing a detectable pattern in the user data region a first known number of bit periods from the location pattern; reading the detectable pattern; calculating a fractional processing delay; and based at least in part on the fractional processing delay and a second known number of bit periods from the location pattern to the end of the servo data region, writing a wobble compensation pattern a whole number of bit periods from the location pattern, wherein the whole number of bit periods corresponds to a single point.