Patents by Inventor Kevin D. Butt
Kevin D. Butt has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11741992Abstract: A method for characterizing a magnetic recording tape, according to one approach, includes measuring, using a magnetic head having servo readers of known pitch, a servo band difference at various locations along a length of a magnetic recording tape. The servo band difference measurements and/or derivatives thereof are stored in association with the magnetic recording tape. This procedure creates a characterization of the magnetic recording tape that is useful for assessing aging of the magnetic recording tape, as well as improving subsequent reading and/or writing operations.Type: GrantFiled: July 31, 2019Date of Patent: August 29, 2023Assignee: International Business Machines CorporationInventors: Kevin B. Judd, Randy C. Inch, Eiji Ogura, Ernest S. Gale, Pamela R. Nylander-Hill, Dale A. Christiansen, Paul M. Greco, Kevin D. Butt, Steven M. Wallace
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Patent number: 10832722Abstract: An apparatus, according to one embodiment, includes a magnetic head having servo readers of known pitch, a drive mechanism for passing a magnetic recording tape over the magnetic head, and a controller electrically coupled to the magnetic head. The controller is configured to measure, using signals from the magnetic head, a servo band difference at various locations along a length of the magnetic recording tape. The controller is also configured to cause storage of servo band difference information about the servo band difference measurements in association with the magnetic recording tape.Type: GrantFiled: October 23, 2019Date of Patent: November 10, 2020Assignee: International Business Machines CorporationInventors: Kevin B. Judd, Randy C. Inch, Eiji Ogura, Ernest S. Gale, Pamela R. Nylander-Hill, Dale A. Christiansen, Paul M. Greco, Kevin D. Butt, Steven M. Wallace
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Patent number: 10691376Abstract: A computer-implemented method according to one embodiment includes identifying code word interleaved (CWI)-4 entries to be re-written to a data storage cartridge, selecting a subset of the CWI-4 entries to be included within a first CWI-4 set, where a plurality of the CWI-4 entries within the subset are associated with a single sub data set (SDS), and re-writing the first CWI-4 set to the data storage cartridge.Type: GrantFiled: August 29, 2018Date of Patent: June 23, 2020Assignee: International Business Machines CorporationInventors: Kevin D. Butt, Roy D. Cideciyan, Simeon Furrer, Mark A. Lantz
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Publication number: 20200143830Abstract: A method for characterizing a magnetic recording tape, according to one approach, includes measuring, using a magnetic head having servo readers of known pitch, a servo band difference at various locations along a length of a magnetic recording tape. The servo band difference measurements and/or derivatives thereof are stored in association with the magnetic recording tape. This procedure creates a characterization of the magnetic recording tape that is useful for assessing aging of the magnetic recording tape, as well as improving subsequent reading and/or writing operations.Type: ApplicationFiled: July 31, 2019Publication date: May 7, 2020Inventors: Kevin B. Judd, Randy C. Inch, Eiji Ogura, Ernest S. Gale, Pamela R. Nylander-Hill, Dale A. Christiansen, Paul M. Greco, Kevin D. Butt, Steven M. Wallace
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Publication number: 20200143831Abstract: An apparatus, according to one embodiment, includes a magnetic head having servo readers of known pitch, a drive mechanism for passing a magnetic recording tape over the magnetic head, and a controller electrically coupled to the magnetic head. The controller is configured to measure, using signals from the magnetic head, a servo band difference at various locations along a length of the magnetic recording tape. The controller is also configured to cause storage of servo band difference information about the servo band difference measurements in association with the magnetic recording tape.Type: ApplicationFiled: October 23, 2019Publication date: May 7, 2020Inventors: Kevin B. Judd, Randy C. Inch, Eiji Ogura, Ernest S. Gale, Pamela R. Nylander-Hill, Dale A. Christiansen, Paul M. Greco, Kevin D. Butt, Steven M. Wallace
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Patent number: 10600443Abstract: A system includes, according to one embodiment, a magnetic head having a plurality of write transducers configured to store data to tracks of a sequential access medium and a plurality of read transducers. Each read transducer is configured to read data from the sequential access medium after being written thereto by a corresponding write transducer. A first of the read transducers is aligned with a first of the write transducers, wherein the output of the first read transducer is produced during read-while-write. The system also includes a controller and logic integrated with and/or executable by the controller. The logic is configured to read, using the plurality of read transducers, encoded data from a plurality of tracks of the sequential access medium simultaneously.Type: GrantFiled: March 19, 2019Date of Patent: March 24, 2020Assignee: International Business Machines CorporationInventors: Kevin D. Butt, Roy D. Cideciyan, Simeon Furrer, Mark A. Lantz
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Publication number: 20200073587Abstract: A computer-implemented method according to one embodiment includes identifying code word interleaved (CWI)-4 entries to be re-written to a data storage cartridge, selecting a subset of the CWI-4 entries to be included within a first CWI-4 set, where a plurality of the CWI-4 entries within the subset are associated with a single sub data set (SDS), and re-writing the first CWI-4 set to the data storage cartridge.Type: ApplicationFiled: August 29, 2018Publication date: March 5, 2020Inventors: Kevin D. Butt, Roy D. Cideciyan, Simeon Furrer, Mark A. Lantz
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Patent number: 10566022Abstract: An apparatus configured to characterize a magnetic recording tape of a tape cartridge, according to one embodiment, includes a magnetic head having servo readers of known pitch, a drive mechanism for passing a magnetic recording tape over the magnetic head, and a controller electrically coupled to the magnetic head. The controller is configured to measure, using signals from the magnetic head, a servo band difference at various locations along a length of the magnetic recording tape of a tape cartridge. The controller is also configured to store the servo band difference measurements and/or derivatives thereof in association with the tape cartridge.Type: GrantFiled: July 31, 2019Date of Patent: February 18, 2020Assignee: International Business Machines CorporationInventors: Kevin B. Judd, Randy C. Inch, Eiji Ogura, Ernest S. Gale, Pamela R. Nylander-Hill, Dale A. Christiansen, Paul M. Greco, Kevin D. Butt, Steven M. Wallace
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Patent number: 10460757Abstract: A method for characterizing a magnetic recording tape of a tape cartridge, according to one approach, includes measuring, using a magnetic head having servo readers of known pitch, a servo band difference at various locations along a length of a magnetic recording tape of a tape cartridge. The servo band difference measurements and/or derivatives thereof are stored in association with the tape cartridge. This procedure creates a characterization of the magnetic recording tape that is useful for assessing aging of the magnetic recording tape, as well as improving subsequent reading and/or writing operations.Type: GrantFiled: November 5, 2018Date of Patent: October 29, 2019Assignee: International Business Machines CorporationInventors: Kevin B. Judd, Randy C. Inch, Eiji Ogura, Ernest S. Gale, Pamela R. Nylander-Hill, Dale A. Christiansen, Paul M. Greco, Kevin D. Butt, Steven M. Wallace
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Publication number: 20190214053Abstract: A system includes, according to one embodiment, a magnetic head having a plurality of write transducers configured to store data to tracks of a sequential access medium and a plurality of read transducers. Each read transducer is configured to read data from the sequential access medium after being written thereto by a corresponding write transducer. A first of the read transducers is aligned with a first of the write transducers, wherein the output of the first read transducer is produced during read-while-write. The system also includes a controller and logic integrated with and/or executable by the controller. The logic is configured to read, using the plurality of read transducers, encoded data from a plurality of tracks of the sequential access medium simultaneously.Type: ApplicationFiled: March 19, 2019Publication date: July 11, 2019Inventors: Kevin D. Butt, Roy D. Cideciyan, Simeon Furrer, Mark A. Lantz
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Patent number: 10339971Abstract: In one embodiment, a system includes a magnetic head having a plurality of write transducers and a plurality of read transducers. Each read transducer is configured to read data from a sequential access medium after being written thereto by a corresponding write transducer. The system also includes a controller and logic integrated with and/or executable by the controller. The logic is configured to read, using the plurality of read transducers, encoded data from a plurality of tracks of the sequential access medium simultaneously. The logic is also configured to determine that one or more tracks of the sequential access medium are dead within a sliding window. Moreover, the logic is configured to rewrite a set of encoded data from the one or more dead tracks to live tracks in a rewrite area of the sequential access medium. Other systems, methods, and computer program products are described according to more embodiments.Type: GrantFiled: December 19, 2017Date of Patent: July 2, 2019Assignee: International Business Machines CorporationInventors: Kevin D. Butt, Roy D. Cideciyan, Simeon Furrer, Mark A. Lantz
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Publication number: 20190189156Abstract: In one embodiment, a system includes a magnetic head having a plurality of write transducers and a plurality of read transducers. Each read transducer is configured to read data from a sequential access medium after being written thereto by a corresponding write transducer. The system also includes a controller and logic integrated with and/or executable by the controller. The logic is configured to read, using the plurality of read transducers, encoded data from a plurality of tracks of the sequential access medium simultaneously. The logic is also configured to determine that one or more tracks of the sequential access medium are dead within a sliding window. Moreover, the logic is configured to rewrite a set of encoded data from the one or more dead tracks to live tracks in a rewrite area of the sequential access medium. Other systems, methods, and computer program products are described according to more embodiments.Type: ApplicationFiled: December 19, 2017Publication date: June 20, 2019Inventors: Kevin D. Butt, Roy D. Cideciyan, Simeon Furrer, Mark A. Lantz
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Patent number: 9285996Abstract: Various embodiments for improving tape drive efficiency using a processor device are provided. In one embodiment, a method comprises aggregating one of records and filemarks, the aggregating restricted to being performed only on read operations, from a plurality of data segments into at least one single data segment, including sequentially aggregating the one of the records and filemarks into the at least one single data segment.Type: GrantFiled: October 5, 2015Date of Patent: March 15, 2016Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Kevin D. Butt, Paul M. Greco, Takashi Katagiri, Yuhko Mori
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Patent number: 9263092Abstract: A method according to one embodiment includes monitoring a plurality of parameters relating to operation of a tape drive to collect data from the operation of the tape drive. A specification of one or more of the parameters to log during one or more collection windows is received. At least some of the data collected from the operation of the tape drive is logged to a memory during the one or more collection windows, where the at least some of the data collected is stored in a plurality of fields. The method further includes dynamically overlaying one or more of the fields with data corresponding to the one or more specified parameters.Type: GrantFiled: November 19, 2014Date of Patent: February 16, 2016Assignee: International Business Machines CorporationInventors: Kevin D. Butt, Ernest S. Gale, Pamela R. Nylander-Hill
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Publication number: 20160026389Abstract: Various embodiments for improving tape drive efficiency using a processor device are provided. In one embodiment, a method comprises aggregating one of records and filemarks, the aggregating restricted to being performed only on read operations, from a plurality of data segments into at least one single data segment, including sequentially aggregating the one of the records and filemarks into the at least one single data segment.Type: ApplicationFiled: October 5, 2015Publication date: January 28, 2016Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Kevin D. BUTT, Paul M. GRECO, Takashi KATAGIRI, Yuhko MORI
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Patent number: 9244628Abstract: In one embodiment, a tape drive includes a drive buffer, a processor, and logic integrated with and/or executable by the processor, the logic being configured to cause the processor to: receive a list including: user data segments recorded on tape media, wherein the user data segments are arranged in the list according to a predetermined order, and information associated with each user data segment, wherein the information includes a description of a physical location of each of the user data segments on the tape media. The logic is further configured to cause the processor to locate each of the user data segments on the tape media according to the order in the list, read each of the user data segments from the tape media according to the order in the list, and write each of the user data segments to a buffer according to the order in the list.Type: GrantFiled: October 17, 2013Date of Patent: January 26, 2016Assignee: GLOBALFOUNDRES Inc.Inventors: Kevin D. Butt, Paul M. Greco, James M. Karp, Takashi Katagiri
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Patent number: 9201724Abstract: A technique for providing end-to-end data protection while supporting multiple cyclic-redundancy-check (CRC) algorithms includes receiving a data block protected by a first CRC. The first CRC is generated using a first CRC algorithm. The integrity of the data block is checked using the first CRC and the first CRC algorithm. A second CRC for the data block is then computed using a second CRC algorithm different from the first CRC algorithm. The data block, first CRC, and second CRC are stored on a storage medium, such as magnetic tape.Type: GrantFiled: April 30, 2012Date of Patent: December 1, 2015Assignee: International Business Machines CorporationInventors: Kevin D. Butt, Paul J. Seger
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Patent number: 9189162Abstract: Records or filemarks read from data segments are aggregated into at least one single data segment. The records and the filemarks are padded at an end of the one single data segment, such that the padding of the end of the one single data segment is less than padding of the one of the records and filemarks in the plurality of data segments.Type: GrantFiled: January 23, 2015Date of Patent: November 17, 2015Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Kevin D. Butt, Paul M. Greco, Takashi Katagiri, Yuhko Mori
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Publication number: 20150138662Abstract: Records or filemarks read from data segments are aggregated into at least one single data segment. The records and the filemarks are padded at an end of the one single data segment, such that the padding of the end of the one single data segment is less than padding of the one of the records and filemarks in the plurality of data segments.Type: ApplicationFiled: January 23, 2015Publication date: May 21, 2015Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Kevin D. BUTT, Paul M. GRECO, Takashi KATAGIRI, Yuhko MORI
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Patent number: 9021175Abstract: A method, system and computer-usable medium are disclosed for reordering User Data Segment (UDS) lists to reduce seek times when accessing data stored on tape media. A host application sends a list of UDSs to a target tape drive and requests the tape drive to reorder the list to provide better performance. An ordered list of target User data Segments to retrieve from a target tape media is received. Information related to the location of each UDS on the target media is processed to determine its corresponding physical position on the tape media. The resulting physical positions are then processed to generate a reordered UDS list, where the order of the User Data Segments is reordered according to their physical location on the target tape media. The reordered list of User Data Segments is then used to perform seek, reposition and read operations to read User Data Segments from the tape media.Type: GrantFiled: August 24, 2010Date of Patent: April 28, 2015Assignee: International Business Machines CorporationInventors: Kevin D. Butt, Scott M. Fry, Paul M. Greco, Takashi Katagiri, Yutaka Oishi