Patents by Inventor KEVIN B. JUDD
KEVIN B. JUDD 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: 10515663Abstract: A determination is made whether read/write is enabled within the tape drive storage unit. In response to determining that read/write is enabled, a determination is made whether a temperature within the tape drive storage unit exceeds a threshold value. In response to determining that the temperature within the tape drive storage unit exceeds the threshold value, a determination is made of a direction of travel of a tape media within the tape drive storage unit. In response to determining that the direction of travel is a forward direction, a first cooling device is powered on. The first cooling device lowers the temperature of a first guide roller and the tape media coming off a first tape storage reel prior to the tape media passing by a read/write head within the tape drive storage unit.Type: GrantFiled: June 17, 2019Date of Patent: December 24, 2019Assignee: International Business Machines CorporationInventors: Nhan X. Bui, Kevin B. Judd, Randy C. Inch, Mark A. Lantz, David H. F. Harper
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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: 20190325910Abstract: A tape drive-implemented method, according to one embodiment, includes: detecting a read error, and sending one or more instructions to perform a first re-read attempt on a portion of a magnetic tape corresponding to the read error. In response to determining that the first re-read attempt was unsuccessful, a range of tension settings is selected. A range of lateral offsets is also selected. Moreover, one or more instructions are sent to apply each unique combination of a tension setting from the range of tension settings and a lateral offset from the range of lateral offsets. For each of the unique combinations applied, one or more instructions are sent to perform a second phase re-read attempt on the portion of the magnetic tape corresponding to the read error. Furthermore, a determination is made as to whether the second phase re-read attempt was performed successfully for any of the unique combinations.Type: ApplicationFiled: February 5, 2019Publication date: October 24, 2019Inventors: Kevin B. Judd, Ernest S. Gale, Randy C. Inch, Eiji Ogura, Kazuhiro Tsuruta, Pamela R. Nylander-Hill, Tsuyoshi Miyamura
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Publication number: 20190311738Abstract: An apparatus, according to one embodiment, includes: a support plate, a stator, a rotor sub-assembly, and at least one isolation mount coupled between the support plate and the stator. The isolation mount is for reducing transfer of vibration from the stator to the support plate. Moreover, the stator is coplanar with the support plate. The rotor sub-assembly includes a magnet, and a hub rotatably fixed relative to the magnet. The rotor sub-assembly is also configured to rotate relative to the support plate and the stator. Other systems, methods, and computer program products are described in additional embodiments.Type: ApplicationFiled: June 21, 2019Publication date: October 10, 2019Inventors: David H. F. Harper, Kevin B. Judd, Armando Argumedo
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Publication number: 20190311739Abstract: An apparatus, according to one embodiment, includes: a support plate, a stator, and a stator support arm. The stator support arm has a first end that is coupled to the support plate, and extends from the support plate to the stator. Moreover, the stator is coplanar with the support plate. The apparatus further includes at least one isolation mount, and a rotor sub-assembly. The isolation mount is coupled between a second end of the stator support arm and the stator for reducing transfer of vibration from the stator to the stator support arm. The rotor sub-assembly includes a magnet, and a hub rotatably fixed relative to the magnet. Furthermore, the rotor sub-assembly is configured to rotate relative to the support plate and the stator. Other systems, methods, and computer program products are described in additional embodiments.Type: ApplicationFiled: June 25, 2019Publication date: October 10, 2019Inventors: David H. F. Harper, Kevin B. Judd, Armando Argumedo
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Publication number: 20190304500Abstract: A determination is made whether read/write is enabled within the tape drive storage unit. In response to determining that read/write is enabled, a determination is made whether a temperature within the tape drive storage unit exceeds a threshold value. In response to determining that the temperature within the tape drive storage unit exceeds the threshold value, a determination is made of a direction of travel of a tape media within the tape drive storage unit. In response to determining that the direction of travel is a forward direction, a first cooling device is powered on. The first cooling device lowers the temperature of a first guide roller and the tape media coming off a first tape storage reel prior to the tape media passing by a read/write head within the tape drive storage unit.Type: ApplicationFiled: June 17, 2019Publication date: October 3, 2019Inventors: Nhan X. Bui, Kevin B. Judd, Randy C. Inch, Mark A. Lantz, David H.F. Harper
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Patent number: 10424333Abstract: An apparatus, according to one embodiment, includes: a support plate, a stator, at least one isolation mount coupled between the support plate and the stator for reducing transfer of vibration from the stator to the support plate, and a rotor sub-assembly. Furthermore, the rotor sub-assembly is configured to rotate relative to the support plate and the stator, the rotor sub-assembly including: a magnet, and a hub rotatably fixed relative to the magnet. Other systems, methods, and computer program products are described in additional embodiments.Type: GrantFiled: January 10, 2018Date of Patent: September 24, 2019Assignee: International Business Machines CorporationInventors: David H. F. Harper, Kevin B. Judd, Armando Argumedo
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Patent number: 10424332Abstract: An apparatus, according to one embodiment, includes: a support plate; a stator; a stator support arm having a first end that is coupled to the support plate, the stator support arm extending from the support plate to the stator. The apparatus further includes at least one isolation mount coupled between a second end of the stator support arm and the stator for reducing transfer of vibration from the stator to the stator support arm; and a rotor sub-assembly. The rotor sub-assembly is configured to rotate relative to the support plate and the stator, the rotor sub-assembly including: a magnet; and a hub rotatably fixed relative to the magnet. Other systems, methods, and computer program products are described in additional embodiments.Type: GrantFiled: January 10, 2018Date of Patent: September 24, 2019Assignee: International Business Machines CorporationInventors: David H. F. Harper, Kevin B. Judd, Armando Argumedo
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Patent number: 10410670Abstract: A determination is made whether read/write is enabled within the tape drive storage unit. In response to determining that read/write is enabled, a determination is made whether an absolute value of a channel offset exceeds a threshold value. In response to determining that the absolute value of the channel offset exceeds a threshold value, a direction of travel of the tape media is determined. In response to determining that the direction of travel of the tape media is a forward direction, a determination is made whether the channel offset is positive. In response to determining that the channel offset is positive, a left cooling device within the tape drive storage unit is powered on. The left cooling device lowers the temperature of a left guide roller and the tape media coming off a left tape storage reel prior to the media passing by a read/write head.Type: GrantFiled: February 27, 2019Date of Patent: September 10, 2019Assignee: International Business Machines CorporationInventors: Nhan X. Bui, Kevin B. Judd, Randy C. Inch, Mark A. Lantz, David H. F. Harper
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Publication number: 20190267035Abstract: A determination is made whether read/write is enabled within the tape drive storage unit. In response to determining that read/write is enabled, a determination is made whether an absolute value of a channel offset exceeds a threshold value. In response to determining that the absolute value of the channel offset exceeds a threshold value, a direction of travel of the tape media is determined. In response to determining that the direction of travel of the tape media is a forward direction, a determination is made whether the channel offset is positive. In response to determining that the channel offset is positive, a left cooling device within the tape drive storage unit is powered on. The left cooling device lowers the temperature of a left guide roller and the tape media coming off a left tape storage reel prior to the media passing by a read/write head.Type: ApplicationFiled: February 27, 2019Publication date: August 29, 2019Inventors: Nhan X. Bui, Kevin B. Judd, Randy C. Inch, Mark A. Lantz, David H.F. Harper
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Publication number: 20190267034Abstract: A determination is made whether read/write is enabled within the tape drive storage unit. In response to determining that read/write is enabled, a determination is made whether a temperature within the tape drive storage unit exceeds a threshold value. In response to determining that the temperature within the tape drive storage unit exceeds the threshold value, a determination is made of a direction of travel of a tape media within the tape drive storage unit. In response to determining that the direction of travel is a forward direction, a first cooling device is powered on. The first cooling device lowers the temperature of a first guide roller and the tape media coming off a first tape storage reel prior to the tape media passing by a read/write head within the tape drive storage unit.Type: ApplicationFiled: February 27, 2018Publication date: August 29, 2019Inventors: Nhan X. Bui, Kevin B. Judd, Randy C. Inch, Mark A. Lantz, David H.F. Harper
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Patent number: 10395687Abstract: A determination is made whether read/write is enabled within the tape drive storage unit. In response to determining that read/write is enabled, a determination is made whether a temperature within the tape drive storage unit exceeds a threshold value. In response to determining that the temperature within the tape drive storage unit exceeds the threshold value, a determination is made of a direction of travel of a tape media within the tape drive storage unit. In response to determining that the direction of travel is a forward direction, a first cooling device is powered on. The first cooling device lowers the temperature of a first guide roller and the tape media coming off a first tape storage reel prior to the tape media passing by a read/write head within the tape drive storage unit.Type: GrantFiled: February 27, 2018Date of Patent: August 27, 2019Assignee: International Business Machines CorporationInventors: Nhan X. Bui, Kevin B. Judd, Randy C. Inch, Mark A. Lantz, David H. F. Harper
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Patent number: 10366716Abstract: In one general embodiment, a method includes applying a static head skew to a magnetic tape head, positioning the first reader at a first y-position relative to a servo pattern in a servo band, measuring y-positions of the second reader relative to the servo pattern in the servo band while the first reader is at the first y-position, and averaging the measured y-positions. The method further includes repeating the following process several times: moving the first reader to a next y-position, measuring y-positions of the second reader while the first reader is at the next y-position, and averaging the y-positions measured by the second reader while the first reader is at the next y-position. The method further includes calculating a unique nonlinearity value of the servo pattern in the servo band for each of the average y-position values, and storing and/or outputting the calculated nonlinearity values.Type: GrantFiled: July 24, 2018Date of Patent: July 30, 2019Assignee: International Business Machines CorporationInventors: Kevin B. Judd, Simeon Furrer, Angeliki Pantazi, Mark A. Lantz
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Publication number: 20190214049Abstract: An apparatus, according to one embodiment, includes: a support plate; a stator; a stator support arm having a first end that is coupled to the support plate, the stator support arm extending from the support plate to the stator. The apparatus further includes at least one isolation mount coupled between a second end of the stator support arm and the stator for reducing transfer of vibration from the stator to the stator support arm; and a rotor sub-assembly. The rotor sub-assembly is configured to rotate relative to the support plate and the stator, the rotor sub-assembly including: a magnet; and a hub rotatably fixed relative to the magnet. Other systems, methods, and computer program products are described in additional embodiments.Type: ApplicationFiled: January 10, 2018Publication date: July 11, 2019Inventors: David H. F. Harper, Kevin B. Judd, Armando Argumedo
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Publication number: 20190214050Abstract: An apparatus, according to one embodiment, includes: a support plate, a stator, at least one isolation mount coupled between the support plate and the stator for reducing transfer of vibration from the stator to the support plate, and a rotor sub-assembly. Furthermore, the rotor sub-assembly is configured to rotate relative to the support plate and the stator, the rotor sub-assembly including: a magnet, and a hub rotatably fixed relative to the magnet. Other systems, methods, and computer program products are described in additional embodiments.Type: ApplicationFiled: January 10, 2018Publication date: July 11, 2019Inventors: David H. F. Harper, Kevin B. Judd, Armando Argumedo
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Patent number: 10332554Abstract: A determination is made whether read/write is enabled within the tape drive storage unit. In response to determining that read/write is enabled, a determination is made whether an absolute value of a channel offset exceeds a threshold value. In response to determining that the absolute value of the channel offset exceeds a threshold value, a direction of travel of the tape media is determined. In response to determining that the direction of travel of the tape media is a forward direction, a determination is made whether the channel offset is positive. In response to determining that the channel offset is positive, a first cooling device within the tape drive storage unit is powered on. The first cooling device lowers the temperature of a first guide roller and the tape media coming off a first tape storage reel prior to the media passing by a read/write head.Type: GrantFiled: February 27, 2018Date of Patent: June 25, 2019Assignee: International Business Machines CorporationInventors: Nhan X. Bui, Kevin B. Judd, Randy C. Inch, Mark A. Lantz, David H. F. Harper
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Patent number: 10297280Abstract: A method according to one embodiment includes generating a y-position estimate based on a servo readback signal from a servo reader reading a servo band, retrieving or calculating a nonlinearity-correction value corresponding to the y-position estimate, adjusting the y-position estimate using the nonlinearity-correction value, and outputting the adjusted y-position estimate. A computer program product for compensating for nonlinearity in a timing based servo pattern according to one embodiment includes a computer readable storage medium having program instructions embodied therewith. The computer readable storage medium is not a transitory signal per se. The program instructions are readable and/or executable by a controller to cause the controller to perform the foregoing method.Type: GrantFiled: July 24, 2018Date of Patent: May 21, 2019Assignee: International Business Machines CorporationInventors: Kevin B. Judd, Simeon Furrer, Angeliki Pantazi, Mark A. Lantz
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Patent number: 10276204Abstract: A tape drive-implemented method, according to one embodiment, includes: detecting a read error, determining whether a current tension setting of the magnetic tape is accurate, determining whether the read error is part of an error burst in response to determining that the current tension setting of the magnetic tape is accurate, sending instructions to perform a first re-read attempt in response to determining that the read error is not part of an error burst, determining whether the first re-read attempt was performed successfully, selecting a range of tension settings in response to determining that the first re-read attempt was not performed successfully, selecting a range of lateral offsets, sending instructions to apply each unique combination of tension settings and lateral offsets, for each of the unique combinations applied, sending instructions to perform a second phase re-read attempt, and determining whether the second phase re-read attempt was performed successfully.Type: GrantFiled: April 24, 2018Date of Patent: April 30, 2019Assignee: International Business Machines CorporationInventors: Kevin B. Judd, Ernest S. Gale, Randy C. Inch, Eiji Ogura, Kazuhiro Tsuruta, Pamela R. Nylander-Hill, Tsuyoshi Miyamura
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Patent number: 10242703Abstract: A computer-implemented method includes: determining a reading performance of a head at a commanded lateral reading location; adjusting a location of the head relative to a medium by moving the head in a first lateral direction to an adjusted lateral reading location; determining a reading performance of the head at the adjusted lateral reading location, and determining whether the reading performance at the adjusted lateral reading location is better than the reading performance at the commanded lateral reading location. In response to determining the reading performance is better at the adjusted reading location, the method includes iteratively repeating the adjustment of the location of the head until the reading performance of the head at a current iteration is worse than the reading performance of the head at an immediately previous iteration. Corresponding systems and computer program products are also disclosed.Type: GrantFiled: October 27, 2017Date of Patent: March 26, 2019Assignee: International Business Machines CorporationInventors: Ernest S. Gale, Randy C. Inch, Kevin B. Judd, David L. Swanson
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Publication number: 20180068685Abstract: A computer-implemented method includes: determining a reading performance of a head at a commanded lateral reading location; adjusting a location of the head relative to a medium by moving the head in a first lateral direction to an adjusted lateral reading location; determining a reading performance of the head at the adjusted lateral reading location, and determining whether the reading performance at the adjusted lateral reading location is better than the reading performance at the commanded lateral reading location. In response to determining the reading performance is better at the adjusted reading location, the method includes iteratively repeating the adjustment of the location of the head until the reading performance of the head at a current iteration is worse than the reading performance of the head at an immediately previous iteration. Corresponding systems and computer program products are also disclosed.Type: ApplicationFiled: October 27, 2017Publication date: March 8, 2018Inventors: Ernest S. Gale, Randy C. Inch, Kevin B. Judd, David L. Swanson