Writable servo overlap zones

摘要

Systems and methods are disclosed for writable servo zone overlap regions on a disc memory. An apparatus may comprise a controller configured to determine a servo gate (sgate) timing for an overlap zone including servo patterns of a first servo super zone and a second servo super zone of a disc memory, the sgate timing based on servo pattern timing for the first servo super zone and the second servo super zone. The controller may initiate writing to the overlap zone based on the sgate timing. The controller may also reduce the impact of servo pattern frequency change between zones by calculating a trajectory error prior to the crossing, and providing 1/X of the trajectory error into a servo feedback loop for a following X servo sampling points.

主权项

1. An apparatus comprising:
a controller configured to:
determine a first servo gate (sgate) timing for a first overlap zone including servo patterns of a first servo super zone and servo patterns of a second servo super zone of a data storage medium, the first sgate timing based on servo pattern timing for the first servo super zone and the second servo super zone; andinitiate writing user data to the first overlap zone based on the first sgate timing.