Magnetic recording system with ternary pattern dependent write signaling
AssigneeAvago Technologies General IP (Singapore) Pte. Ltd.
InventorsBruce A. Wilson, Ross S. Wilson, Peter J. Windler
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Abstract
A storage system includes a magnetic write head, a magnetic storage medium, a write data circuit having a write data output and a magnet length signal output, and a preamplifier that receives the write data and a magnet length signal from the write data circuit, and sets at least one write current characteristic through the magnetic write head based at least in part on the magnet length signal. The write data circuit processes write data to be recorded on the magnetic storage medium by the magnetic write head. The magnet length signal output communicates magnet lengths in the write data.
Claims20
A storage system, comprising:
- a magnetic write head;
- a magnetic storage medium;
- a write data circuit comprising a write data output to output write data and a magnet length signal output to output a magnet length signal that communicates magnet lengths in the write data, wherein the write data circuit is operable to process the write data to be recorded on the magnetic storage medium by the magnetic write head, and wherein at least some states of the magnet length signal are mapped to the magnet lengths to communicate the magnet lengths;
- and
- a preamplifier operable to receive the write data and the magnet length signal from the write data circuit, and to set at least one write current characteristic through the magnetic write head based at least in part on the magnet length signal.
A method of writing data to a magnetic storage device, the method comprising:
- receiving write data to be recorded on a magnetic storage device;
- identifying magnet lengths in the write data in a write data circuit;
- communicating the magnet lengths from the write data circuit to a preamplifier with a magnet length signal, wherein at least some states of the magnet length signal are mapped to the magnet lengths to communicate the magnet lengths;
- sampling the magnet length signal in the preamplifier to retrieve the magnet lengths;
- selecting at least one write current characteristic in the preamplifier based on the magnet lengths;
- and
- recording the write data on the magnetic storage device according to the at least one write current characteristic.
A data processing system comprising:
- a write data circuit to:
- determine magnet lengths in write data to be stored on a magnetic storage device;
- and
- communicate the magnet lengths with a magnet length signal and at a frequency lower than that of the write data, wherein at least some states of the magnet length signal are mapped to the magnet lengths to communicate the magnet lengths;
- and
- a preamplifier to record the write data on the magnetic storage device based at least in part on the magnet lengths communicated from the write data circuit to the preamplifier by setting at least one write current characteristic based on the magnet lengths.
Dependencies are inferred from the claim text.