Magnetic recording system using pattern dependent writer having register pages for storing write currents

A method of writing data to a magnetic storage device, the method comprising:

• receiving write data to be recorded on a magnetic storage device;
• determining magnet lengths in the write data based on the write data and a clock signal or based on a pattern dependent write register page selection signal depending on an operating mode of the magnetic storage device;
• retrieving pattern dependent write current characteristics from one of a plurality of register pages in a writer based on the magnet lengths in the write data;
• and
• recording the write data on the magnetic storage device according to the pattern dependent write current characteristics retrieved from the register pages.

A data processing system comprising:

• means for determining magnet lengths in write data to be stored on a magnetic storage device, wherein the magnet lengths are determined using a clock signal and the write data in a first mode and the magnet lengths are determined using a selection signal in a second mode;
• means for storing pattern dependent write current characteristics organized by the magnet lengths;
• means for retrieving the pattern dependent write current characteristics based on the magnet lengths;
• and
• means for recording the write data on the magnetic storage device based at least in part on the pattern dependent write current characteristics.