Patent ID: 9715887
Date: 2017-07-25
CPC Classifications: G11B

Claim:
1. A storage system, comprising: a magnetic write head; a magnetic storage medium; a channel circuit comprising a write data output, wherein the channel circuit is operable to process write data to be recorded on the magnetic storage medium by the magnetic write head; and a preamplifier operable to receive the write data from the channel circuit, wherein the preamplifier comprises a plurality of register pages configured to store pattern dependent write current characteristics for a plurality of magnet lengths, and wherein the preamplifier is operable to retrieve the write current characteristics based on magnet lengths and to record data bits on the magnetic storage medium using the write current characteristics, wherein the channel circuit and the preamplifier operate in a plurality of operating modes, comprising a clocked mode wherein the magnet lengths are determined based on the write data and on a clock signal from the channel circuit, and a channel mode wherein the magnet lengths are determined based on a pattern dependent write page selection signal from the channel circuit.