Seagate Technology Incorporated

Kurt Wiesen

Joseph Mundenar

Javier Ignacio Guzman

Michael J Conover

Randall Clement Bauck

Peter S Harllee, Iii

A method of forming a recording head for use with a data storage medium in a data storage device. The method includes forming first and second writers of different target geometries. A first recording measurement is performed on one or more storage media using the first writer. A second recording measurement is performed on the one or more storage media using the second writer. Based on a comparison of the first and second recording measurements to a predetermined quantity, either the first writer or the second writer is selected to be operational in the data storage device.

Selectable magnetic writers of different target geometries for reducing performance variance

Multi-writer head with a single operational writer

Systems and methods are disclosed for write fault modulation. In an embodiment, an apparatus may comprise a circuit configured to adjust a write fault value for a data storing system based on a circumferential point of a target data storage location, and write data based on the write fault value. The write fault value may represent an amount of off-track deviation of a data writing system within which data writing operations may be performed. In another embodiment, a memory device may store instructions that cause a processor to perform a method including receiving a write command including write data, determining a write fault threshold for a circumferential point of a target location of the write data, performing, using a transducer, a write operation at the circumferential point based on the write fault threshold, and suspending the write operation when a positional deviation of the transducer exceeds the write fault threshold.

Write fault modulation

Devices including at least one storage disc having a recording surface segmented into a plurality of radial zones, each radial zone having an inner diameter and an outer diameter, each of the plurality of zones having a plurality of concentric tracks; and a track density ramp ratio assigned to each of the plurality of zones, where the track density ramp ratio describes an increase in the track density from the inner diameter of the zone to the outer diameter of the zone.

Controlling track density in storage discs

Systems and methods are disclosed for improving performance in data storage devices, particularly devices employing shingled magnetic recording. In one embodiment, an apparatus may comprise a data storage medium having multiple tracks with multiple track pitches. In another embodiment, a method may comprise formatting a data storage memory with a first track having a first track pitch, and formatting the data storage memory with a second track having a second track pitch. The method may further comprise formatting the computer readable data storage memory with a set of tracks including the first track arranged to store data in a shingled manner where one track at least partially overlaps an adjacent track, and the second track separating the set of tracks from a third track.

Multiple track pitches for SMR

Method and apparatus for identifying the track pitch capability of a recording device, such as but not limited to a recording system and/or a servo control system in a data storage device. In accordance with some embodiments, data are written to first and second tracks at an initial track pitch such that the second track at least partially overlaps the first track. Data are arranged on the first track in code words each having a fixed plurality of bits which are decoded as a group by a data channel. The code words are transferred from the first track to the data channel, and a final track pitch for subsequent tracks is responsive to a distance at which nominally half of the code words are undecodeable by the data channel.

Growing community of inventors

Lyons, CO, United States of America

Kurt Wiesen