Oracle International Corporation

Oracle America, Inc.

Faramarz Mahnad

Scott David Wilson

Joseph J Kozak

Dwayne Edling

John L Ritter

Lingtao Wang

Matthew C Fienberg

Paul Coles

Michael Kearnan

Makoto Miyamoto

Charles R Watt

Satya Mallick

Joseph M Panish

Timothy J Frey

Tzuo-Chang Lee

Forrest Lundstrom

Dennis Lauze

George Raniuk

Fred Ross Hansen

Carl A Maietta

Steve Ray

Scott Wilson

A method is provided for making stamper plates for an embossing drum for embossing tape media. At least one first stamper plate is formed using a master template. The at least one first stamper plate includes first land and groove patterns that are an inverse of the master template land and groove patterns. At least one second stamper plate is formed from the at least one first stamper plate. The at least one second stamper plate includes second land and groove patterns that are an inverse of the first land and groove patterns. Furthermore, the first stamper plates and the second stamper plates have four sections arranged in a travel direction of the tape media, a first and a fourth of the four sections having land and groove patterns that are laterally mirrored with respect to each other. A first stamper plate is coupled to a second stamper plate to form part of the drum for embossing tape media.

Optical tape embosser drum with shim identification

Amplitude or phase modulated uncompensated wobble patterns representing address patterns for track addresses of optical media are generated or applied to the media. A filter is applied to the un-compensated wobble patterns to detect a threshold value to signal the existence of a synchronization pattern. A pair of filters can be used to detect the threshold and a zero-crossing. This methodology can detect the existence and timing of the wobble pattern. This can eliminate the need for a timing recovery subfield in the wobble pattern of the prior art.

Storage tape wobble decoder and method

A method for providing tracking error signals in an optical data storage system includes a step of receiving a wobble signal having a first frequency from the wobble detection system. The wobble detection system includes an optical pick up unit that detects positions of the head relative to lands and grooves. Characteristically, the wobble signal is amplitude modulated for positions intermediate between the land and the groove. The method further includes a step of receiving a primary tracking error signal from the wobble detection system. The wobble signal is multiplied with a synchronous signal to about a product signal. The product signal is positive for a first direction of motion and negative for a second direction of motion that is opposite that of the first direction. The product signal is integrated to obtain a quadrature track error signal.

Quadrature track error signal for optical recording media and devices

A method is provided for making an embossing drum that is useable to emboss tape media. The method includes assembling together multiple stamper plates that each have embossing features for embossing tape media, and the stamper plates include at least one first plate and at least one second plate. Furthermore, the embossing features of each first plate are inverted with respect to the embossing features of each second plate.

In at least one embodiment, an optical data storage tape is provided. The optical data storage tape includes a read/write data area including a plurality of writeable tracks for storing data thereon, each writeable track having a first track width. The optical data storage tape further includes a seam area positioned proximate to the read/write data area. The seam area including a plurality of non-writeable tracks, each non-writeable track including a second track width that is greater than the first track width for each writeable track.

Optical tape with an increased track pitch for improvement of tracking performance after seam

In at least one embodiment, an optical data storage tape including a plurality of tracks is provided. The plurality of tracks include a first track having a plurality of first informational fields configured to store one of first positional information indicative of a location on an optical tape and a first predetermined sequence of data. The plurality of tracks further include a second track located adjacent to the first track and having a plurality of second informational fields configured to store one of second positional information indicative of the location on the optical tape and a second predetermined sequence of data. The first positional information is located adjacent to the second predetermined sequence of data on the optical tape to minimize cross track interference during a read operation.

Apparatus for minimizing cross track interference for optical tape

An optical storage system includes an optical head and controller arrangement. The arrangement is configured to write data to an optical medium via a higher power main beam, to read, directly after writing, feedback from the medium containing the written data and noise resulting from the higher power main beam, to remove the noise from the feedback by dividing the feedback with data indicative of the higher power main beam, and to generate output indicative of the written data.

Optical storage system divider based draw verification

Various embodiments herein include utilities for generating embosser drums that are used to pre-format optical media such as optical tape with a pattern of nanostructures such as wobbled grooves. One utility includes generating a plurality of replicas from an embossing master, bonding the replicas together to form a bonded replica structure having a surface with the nanostructure pattern imprinted therein, creating a replica of the bonded replica structure and electroforming a metallic layer onto the bonded replica structure replica to create a single, one piece, metallic shim which can be used to create a weld-less embosser drum.

Methods for manufacturing an embosser drum for use in pre-formatting optical tape media

A nano-imprinting system may be configured to at least one of transport, emboss, coat and slit an optical media according to operational parameters. A control system may be configured to detect one or more attributes of the optical media that result from at least one of the embossing and coating of the optical media, and to adjust at least one of the operational parameters based on the detected one or more attributes.

Optical media production system and method for controlling same

A method of making stamper plates for an embossing drum for embossing tape media is provided. The method includes forming one or more first stamper plates using a master template, and forming a second stamper plate from one of the one or more first stamper plates such that the second stamper plate and the one first stamper plate have inverse land and groove patterns. Furthermore, the second stamper plate and the one first stamper plate or another of the one or more first stamper plates are useable on the drum to emboss tape media.

An optical data storage tape includes more than one segment, with each segment divided into multiple zones, which include multiple data tracks. The layout of the logical zones in one segment is in a different order than those of another segment. In an example, the tape includes at least N physical segments, at least M physical zones in each segment, at least M logical zones assigned to the M physical zones, and wherein logical zones of adjacent physical segments are in a different order than an adjacent physical segment.

Distributed logical track layout in optical storage tape

A system and method for controlling positioning of an optical pickup unit relative to at least one track of an optical data storage medium include an adaptive track position feedback controller that compensates for defocus of an optical beam relative to the optical data storage medium associated with movement across the medium and/or disturbances in distance between a lens of the optical pickup unit relative to the optical data storage medium. A track position feedback controller may include an adaptive term or parameter based on a focus (or defocus) error signal generated by a focus position feedback controller and associated sensors or detectors of a quadrature photodiode integrated circuit (PDIC).

Adaptive control of tracking servo system of optical heads in optical storage devices

Amplitude or phase modulated un-compensated wobble patterns representing address patterns for track addresses of optical media are generated. A filter is applied to the un-compensated wobble patterns to pre-compensate the un-compensated wobble patterns. When an inverse of the filter is applied to a signal representing the pre-compensated wobble patterns in the presence of noise, the noise is suppressed and the un-compensated wobble patterns are substantially recovered.

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Brookline, MA, United States of America

Faramarz Mahnad