Hewlett-packard Development Company, L.p.

Hewlett-packard Company

Hewlett Packard Enterprise Development LP

Quantum Corporation

Lawrence A Hansen

Paul W Poorman

Ralph F Simmons, Jr

Mike Alan Holmberg

Marc Roman Humann

Geoff Spratt

Brian Brong

Jeffrey S McAllister

Richard H Dee

Michael Clinton Allyn

Steven L Brittenham

Eric Petersen

Scott A Swanbeck

Charles B Gamble

Mike Sharrock

Gary Bartles

A system including a magnetic tape processing system that includes a read/write head to write to a top surface of a magnetic tape. The read/write head provides a write head field gradient of at least 40 Oersteds per nanometer at the top surface of the magnetic tape. The magnetic tape processing system and the read/write head provide a track density of greater than 8000 tracks per inch, a bit density of greater than 440 kilo-bits per inch, and an aspect ratio of less than 70.

Magnetic tape processing

Embodiments of the present invention are directed to the design and implementation of backward-compatible magnetic tape drives () that are read/write compatible with a current magnetic-tape format () as well as one or more previous magnetic-tape formats (and). Embodiments of the present invention include read/write tape-head configurations (-) and corresponding magnetic-tape-drive-component features () that allow a magnetic-tape drive to read and write magnetic tapes formatted according to different formats.

Magnetic-tape drive and magnetic-tape head compatible with multiple tape formats

Methods and apparatus are provided related to magnetic recording tape. Respective voltage sources are coupled to respective magnetic head components of a tape recording apparatus. Circuitry controls each voltage source independently in accordance with identity information for a magnetic tape, relative humidity within the tape recording apparatus, or other factors. Chemical migration from the tape, and/or plating or erosion of elements of the tape recording apparatus are substantially reduced or eliminated according to the present teachings.

Reduction of degradation of magnetic tape apparatus

A flexible circuit having a first end attached to a clamping mechanism and a second end attached to a carriage to move, a magnetic head to read a tape. The clamping mechanism has a curved surface to allow the flexible circuit to maintain an S-shape when the magnetic head moves with respect to the magnetic tape.

Flexible circuit for use with a magnetic head

Various embodiments are disclosed for a flexible circuit. In one embodiment, the flexible circuit bends on a curved surface to form a partial loop.

Tape drive with a clamping mechanism coupled to a flexible circuit

A tape back-up drive having a head assembly. The head assembly includes a head configured to read data from a tape and to write data to the tape. The head assembly also includes at least one tape guide disposed adjacent to the head.

Tape drive

In one embodiment, a magnetic media write signal filter includes a plurality of resistors connected in series across output signal lines of a write driver and a capacitor connected between a junction of resistors and a ground.

Magnetic media write signal filter

An apparatus and method for electrically coupling read elements and write elements of a tape head assembly to another component includes an interconnect structure having plural layers of traces, with the traces comprising write traces electrically connected to respective write elements, and read traces electrically connected to respective read elements. The write traces and read traces are interleaved across a dimension of the interconnect structure.

Interconnect structure having multiple layers of traces for electrical connection to a tape head assembly

A tape head assembly comprises a transducer head having plural arrays of transducing elements, the transducing elements comprising at least one of write elements and read elements. The tape head assembly further comprises a set of conditioning elements, the conditioning elements comprising at least one of write drivers and read amplifiers. Multiplexing circuitry selectively couples the conditioning elements to one of the plural arrays of transducing elements.

Tape head assembly

A data recording system includes media such as a magnetic disk or tape, a read/write head assembly, and a circuit that provides a write signal having edge placement equalization. The circuit responds to a binary serial data signal such as a run length limited signal of the type (1,x) and provides a write signal having data transitions corresponding to one of the two binary data values, the absence of a transition corresponding to the other data value. In addition, the write signal is provided with a pair of equalization transitions during periods of no data transitions. A first data transition is shifted away from the last provided equalization transition by a predetermined offset. A second data transition, provided immediately after the first data transition, may be shifted toward the last provided equalization transition. Timing of the data transitions is derived from a clock used to provide the equalization transitions.

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Meridian, ID, United States of America

Lawrence A Hansen