International Business Machines Corporation

Diana Joyce Hellman

Glen Alan Jaquette

Brian Gerard Goodman

Michael Philip McIntosh

Shinobu Fujihara

Dylan J Boday

Mark Alfred Lantz

Jason Lee Peipelman

Icko E T Iben

Jeffrey Owen Kephart

Pierre-Olivier Jubert

Wayne B Riley

Josephine F Bayang

Valerio Bellizia

James K MacKenzie

Stephen Viselli

Daniel Charles Estelle

Douglas Wallace Todd

Srinivasarao Siddabattini

Michael Gaertner

Dillon H Ginley

Attila Kollar

Nhan Xuan Bui

Leonard George Jesionowski

Reed Alan Hancock

Mark Edward Dean

Edwin Ralph Childers

Wayne Alan McKinley

Eric Rolf Christensen

Daniel J Moore

Daniel Scott Moore

Mariel Acosta-Geraldino

According to one embodiment, a magnetic recording medium includes: a substrate; an underlayer positioned above the substrate; a magnetic recording layer positioned above the underlayer; and a plurality of conductive polymers dispersed within the substrate, the underlayer, the magnetic recording layer, the substrate and the underlayer, the substrate and the magnetic recording layer, the underlayer and the magnetic recording layer, or the underlayer, the magnetic recording layer, and the substrate. In addition, the conductive polymers are dispersed such that a concentration of the conductive polymers has a gradient in a single one of the layers in a thickness direction.

Conductive polymers for use in magnetic media

According to one embodiment, a multi-layer magnetic nanoparticle includes a core; a first magnetic layer deposited on a surface of the core; a second magnetic layer deposited on a surface of the first magnetic layer, and a third magnetic layer deposited on a surface of the second magnetic layer. The core, the first magnetic layer, the second magnetic layer, and the third magnetic layer comprise different magnetic anisotropies and/or saturation magnetizations with respect to each other.

Multi-layer magnetic nanoparticles for magnetic recording

Power usage is estimated in a computing environment by automatically detecting hardware configuration information by use of a software agent that is translated into power consumption information for implementing a plurality of power estimation models for efficient power consumption and utilization.

Estimating power usage in a computing environment

According to one embodiment, a magnetic recording medium includes a substrate, an underlayer positioned above the substrate, a magnetic recording layer positioned above the underlayer, and a plurality of conductive polymers dispersed within at least one of the substrate, the underlayer and the magnetic recording layer.

According to one embodiment, a multi-layer magnetic nanoparticle includes a core; a first magnetic layer deposited on a surface of the core; and a second magnetic layer deposited on a surface of the first magnetic layer, where the core, the first magnetic layer and the second magnetic layer comprise different magnetic anisotropies and/or saturation magnetizations.

Method, system, and computer program product embodiments for recording data on a contactless integrated circuit (IC) memory associated with a data storage cartridge are provided. In one exemplary embodiment, a consistency is verified between a TOC written to a contactless IC memory and an index, wherein if the TOC and the index are inconsistent, a TOC profile file is refreshed with data from the index. The TOC is written to the contactless IC memory.

Contactless IC memory on removeable media

Method, system, and computer program product embodiments for recording data on a contactless integrated circuit (IC) memory associated with a data storage cartridge are provided. In one exemplary embodiment, subsequent to an insertion of a data storage cartridge, a consistency is verified between a TOC written to a contactless IC memory and an index, wherein if the TOC and the index are inconsistent, a TOC profile file is refreshed with data from the index. The TOC is written to the contactless IC memory.

Method, system, and computer program product embodiments for recording data on a contactless integrated circuit (IC) memory associated with a data storage cartridge are provided. In one exemplary embodiment, an index of a plurality of files to be recorded on a storage media of the data storage cartridge is parsed with a table of contents (TOC) profile file to build a table of contents (TOC) specific to an owning application of the plurality of files. The TOC is written to the contactless IC memory.

Contactless IC memory on removable media

Control of the encryption of data for storage with respect to removable data storage cartridges having a recording media and having cartridge memory with at least a portion lockable to read-only, employs the steps of inspecting the read-only portion of the cartridge memory of the removable data storage cartridge for an 'Encrypt-Only' flag. If the 'Encrypt-Only' flag is present, writes to the recording media of the removable data storage cartridge are limited to data in an encrypted format, if any; and, else, writes to the recording media of the removable data storage cartridge are allowed for data in any of encrypted and unencrypted formats.

Encrypt-only data storage cartridge

Magnetic tape devices encounter read and/or write errors when the tape is not being passed across the head with the proper tension and/or skew angle. According to one embodiment, a system which corrects for these problems comprises a head having an array of at least one of readers and writers, a drive mechanism for passing a magnetic recording tape over the head, a skew-inducing mechanism coupled to the head for adjusting a skew angle of a longitudinal axis of the array relative to a direction normal to a direction of tape travel over the head, and a controller in communication with the head. The system also determines a tape dimensional stability state of the tape and adjust the skew angle away from normal to the direction of tape travel and lowers a tension of the tape across the head if the tape dimensional stability state is in a contracted state.

Systems and methods for correcting magnetic tape dimensional instability

A controller of an automated data storage library is configured to store information regarding operation of the library in a memory; to reserve at least one data storage cartridge; and to operate a data storage drive and the memory to transfer at least a portion of the information stored in the memory to the reserved data storage cartridge. The library controller is configured to maintain an externally available inventory of data storage cartridges of the library, e.g. for a host system, and excludes the reserved data storage cartridge from the inventory.

Storing information regarding operation of an automated data storage library to memory and to a reserved cartridge

A method for monitoring the activity of a tape drive system having one or more electro-mechanical components that receive electrical current from a power supply. The method includes sampling an actual current supplied to an electro-mechanical component of a tape drive system from a power supply during an activity; reading a theoretical current for said activity from a memory; calculating a statistical value for said actual current and said theoretical current; comparing said statistical value to at least one threshold value; and outputting information to at least one of a user, another system, and another process based on said comparison of said statistical value to said at least one threshold value.

Growing community of inventors

Tucson, AZ, United States of America

Diana Joyce Hellman