Hewlett-packard Development Company, L.P.

Hewlett-packard Company

Hewlett Packard Enterprise Development LP

Steven L Brittenham

Mike Alan Holmberg

Geoff Spratt

Brian Brong

Paul W Poorman

Bruce W Schober

Lawrence A Hansen

William P Proctor

Michael Anthony Ellis

Scott A Swanbeck

Eric Petersen

Mike Sharrock

Saiman Kusin

Mark A Rau

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

Techniques to use a model associating condition of a tape head with tape head usage are described. The tape head is for use in a magnetic tape drive. In examples, a condition of the tape head is determined using a model. In examples, the model fits determined values of the condition parameter.

Determining tape head condition

A medium dependent write equalization method is disclosed. The method includes identifying a trait of a magnetic medium. A characteristic of a write equalization signal is then defined according to the identified trait of the magnetic medium.

Medium dependent write equalization

Determining an error in position of at least two heads coupled to a piezoelectric material, and changing a potential applied to a piezoelectric material to reduce the error in position of the at least two heads.

Transducing head

A pattern dependent write equalization method is disclosed. The method includes identifying a trait of a data pattern in a stream of write data. A characteristic of a write equalization signal is then defined according to the identified trait for the data pattern.

Pattern dependent write equalization

A communication channel that is accessible when the product is entirely assembled, but appears to be, and functions like, configuration jumpers to the end user. The communication channel utilizes the terminals of a configuration jumper block as communication paths to an interface device. The terminals of the configuration jumper block may be wired differently depending on the desired function (i.e. send data, receive data, etc.) of the terminals. The configuration information needed by the device is read from the terminals of the configuration block when the communication channel is not active. Switches on the interface device are used to set the configuration information. Configuration jumpers that can be used are the Master, Slave, and Cable Select signals for an ATAPI interface.

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Boise, ID, United States of America

Steven L Brittenham