Patents by Inventor Kris Schouterden
Kris Schouterden 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: 11768701Abstract: A Data Storage Device (DSD) includes a memory for storing data, and a controller configured to execute firmware or code to perform a task. While performing the task, the controller is further configured to assign unique identifiers to respective firmware or code portions that are executed to perform the task, and create a list or data structure including the unique identifier assigned to the firmware or code portion that created the task. A unique identifier is added to the list or data structure for each firmware or code portion executed for the task. The list or data structure indicates the order in which the firmware or code portions are executed.Type: GrantFiled: September 17, 2019Date of Patent: September 26, 2023Assignee: Western Digital Technologies, Inc.Inventors: Bernd Lamberts, Remmelt Pit, Cory J. Peterson, Kris Schouterden, David Hall, Shad Thorstenson, Andy Larson
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Publication number: 20210081238Abstract: A Data Storage Device (DSD) includes a memory for storing data, and a controller configured to execute firmware or code to perform a task. While performing the task, the controller is further configured to assign unique identifiers to respective firmware or code portions that are executed to perform the task, and create a list or data structure including the unique identifier assigned to the firmware or code portion that created the task. A unique identifier is added to the list or data structure for each firmware or code portion executed for the task. The list or data structure indicates the order in which the firmware or code portions are executed.Type: ApplicationFiled: September 17, 2019Publication date: March 18, 2021Inventors: Bernd Lamberts, Remmelt Pit, Cory J. Peterson, Kris Schouterden, David Hall, Shad Thorstenson, Andy Larson
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Patent number: 9368137Abstract: Cleaning a recording head slider in-drive during operation is accomplished by periodically performing a series of full stroke seek operations, whereby liquid contaminants that may have migrated to the head slider are flung from the slider and liquid from the disk surface may be adsorbed onto the slider for removal by way of flinging. Consequently, head-disk spacing may be stabilized and data write operations improved. Furthermore, the series of full stroke seek operations may be performed at predetermined intervals, and for a predetermined period of time. However, the series may be interrupted by a client request, and continued thereafter, so as not to affect the operational status of the recording system.Type: GrantFiled: October 17, 2014Date of Patent: June 14, 2016Assignee: HGST Netherlands B.V.Inventors: Annamica Bhan, Jorge F. Escobar, David H. Jen, Scott McCoy, Thomas Nguyen, Vedantham Raman, Kris Schouterden
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Publication number: 20160111114Abstract: Cleaning a recording head slider in-drive during operation is accomplished by periodically performing a series of full stroke seek operations, whereby liquid contaminants that may have migrated to the head slider are flung from the slider and liquid from the disk surface may be adsorbed onto the slider for removal by way of flinging. Consequently, head-disk spacing may be stabilized and data write operations improved. Furthermore, the series of full stroke seek operations may be performed at predetermined intervals, and for a predetermined period of time. However, the series may be interrupted by a client request, and continued thereafter, so as not to affect the operational status of the recording system.Type: ApplicationFiled: October 17, 2014Publication date: April 21, 2016Inventors: Annamica Bhan, Jorge F. Escobar, David H. Jen, Scott McCoy, Thomas Nguyen, Vedantham Raman, Kris Schouterden
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Patent number: 9047921Abstract: Approaches for adjusting the recording density of a recording medium in a circumferential direction are disclosed. A hard-disk drive includes one or more electronic components configured to divide a track, of a plurality of concentric tracks on a magnetic-recording disk, into a plurality of portions, and write data to each of the plurality of portions at a recording density that is independent of the recording density used for any of the other portions. Data may be written to a first portion of a track at a different frequency than to a second portion of the same track. The frequency at which data is written may be adjusted for different portions of the same track to allow the frequency to be reduced at certain portions shown to have relatively higher soft error rate while increasing the frequency for other portions to achieve a desired average error rate for the track.Type: GrantFiled: November 19, 2009Date of Patent: June 2, 2015Assignee: HGST Netherlands B.V.Inventors: David Jen, Indukumar Kalahasthi, Kris Schouterden, Douglas Zuercher
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Patent number: 8169730Abstract: A hard disk drive (HDD) comprising a magnetic disk that includes a data storage surface and an external magnetic field parallel to the data storage surface for suppressing track interference.Type: GrantFiled: December 17, 2009Date of Patent: May 1, 2012Assignee: Hitachi Global Storage Technologies, Netherlands, B.V.Inventors: Nelson Cheng, Lakshmi Ramamoorthy, Kris Schouterden, Masayoshi Shimokoshi
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Patent number: 8131920Abstract: A data formatting system and method to improve data efficiency and integrity in a hard disk are disclosed. One embodiment provides a disk drive system having a plurality of lookup tables which store a plurality of randomizer seeds which may be dynamically encoded into the preamble field of a customer data block if the customer data is deemed marginal. Encoding the randomizer seed into the preamble field prevents adjacent data track mis-writes and mis-reads.Type: GrantFiled: December 6, 2007Date of Patent: March 6, 2012Assignee: Hitachi Global Storage Technologies, Netherlands B.V.Inventors: Ryoheita Hattori, David H. Jen, Bernd Lamberts, Remmelt Pit, Kris Schouterden
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Patent number: 8068306Abstract: Approaches for improving the write quality of a hard-disk drive (HDD) head experiencing temporary fly-height problem. When the hard-disk drive is idle and heads are parked on the ramp, fluid, such as a lubricant or the condensation of vapor, may collect between the surface of a platter and the head or a slider, thereby causing the head to temporarily fly higher than normal. An HDD may include electronic component(s) configured to (a) determine whether it is likely that fluid is interposed between the surface of a magnetic-recording disk and the slider or the head, and (b) temporarily adjust one or more of (i) a thermal fly height control setting of the head and (ii) a write parameter of the head to compensate for the head flying higher than normal as a result of the fluid being interposed between the surface of the disk and the slider or the head.Type: GrantFiled: December 14, 2009Date of Patent: November 29, 2011Assignee: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Lakshmi Ramamoorthy, David Jen, Douglas Zuercher, Masayoshi Shimokoshi, Kris Schouterden
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Publication number: 20110149427Abstract: A hard disk drive (HDD) comprising a magnetic disk that includes a data storage surface and an external magnetic field parallel to the data storage surface for suppressing track interference.Type: ApplicationFiled: December 17, 2009Publication date: June 23, 2011Inventors: Nelson Cheng, Lakshmi Ramamoorthy, Kris Schouterden, Masayoshi Shimokoshi
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Publication number: 20110141607Abstract: Approaches for improving the write quality of a hard-disk drive (HDD) head experiencing temporary fly-height problem. When the hard-disk drive is idle and heads are parked on the ramp, fluid, such as a lubricant or the condensation of vapor, may collect between the surface of a platter and the head or a slider, thereby causing the head to temporarily fly higher than normal. An HDD may include electronic component(s) configured to (a) determine whether it is likely that fluid is interposed between the surface of a magnetic-recording disk and the slider or the head, and (b) temporarily adjust one or more of (i) a thermal fly height control setting of the head and (ii) a write parameter of the head to compensate for the head flying higher than normal as a result of the fluid being interposed between the surface of the disk and the slider or the head.Type: ApplicationFiled: December 14, 2009Publication date: June 16, 2011Inventors: Lakshmi Ramamoorthy, David Jen, Douglas Zuercher, Masayoshi Shimokoshi, Kris Schouterden
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Publication number: 20110116186Abstract: Approaches for adjusting the recording density of a recording medium in a circumferential direction are disclosed. A hard-disk drive includes one or more electronic components configured to divide a track, of a plurality of concentric tracks on a magnetic-recording disk, into a plurality of portions, and write data to each of the plurality of portions at a recording density that is independent of the recording density used for any of the other portions. Data may be written to a first portion of a track at a different frequency than to a second portion of the same track. The frequency at which data is written may be adjusted for different portions of the same track to allow the frequency to be reduced at certain portions shown to have relatively higher soft error rate while increasing the frequency for other portions to achieve a desired average error rate for the track.Type: ApplicationFiled: November 19, 2009Publication date: May 19, 2011Inventors: David Jen, Indukumar Kalahasthi, Kris Schouterden, Douglas Zuercher
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Patent number: 7920350Abstract: Data recovery information characterizes data recovery procedure (DRP) steps to be performed within a hard disk drive (HDD) in response to a miss. Particular data recovery information corresponds to a radial position of the actuator and, therefore, the position of the magnetic recording read/write head relative to the associated storage media at the location at which the miss occurred. The data recovery information is based on the physical shape of a write pole and on how the physical shape of the pole inherently affects operational data error associated with the head. Because of the foregoing characteristics of such data recovery information, a more efficient and performant data recovery procedure is performed based thereon.Type: GrantFiled: September 30, 2008Date of Patent: April 5, 2011Assignee: Hitachi Global Storage Technologies, Netherlands, B.V.Inventors: Hoan A. Au, Theofilos G. Fkiaras, David H. Jen, Bernd Lamberts, Kris Schouterden, Douglas M. Zuercher
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Publication number: 20100079903Abstract: Data recovery information characterizes data recovery procedure (DRP) steps to be performed within a hard disk drive (HDD) in response to a miss. Particular data recovery information corresponds to a radial position of the actuator and, therefore, the position of the magnetic recording read/write head relative to the associated storage media at the location at which the miss occurred. The data recovery information is based on the physical shape of a write pole and on how the physical shape of the pole inherently affects operational data error associated with the head. Because of the foregoing characteristics of such data recovery information, a more efficient and performant data recovery procedure is performed based thereon.Type: ApplicationFiled: September 30, 2008Publication date: April 1, 2010Inventors: Hoan A. Au, Theofilos G. Fkiaras, David H. Jen, Bernd Lamberts, Kris Schouterden, Douglas M. Zuercher
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Patent number: 7643240Abstract: A method for increasing reliability of a hard disk drive (HDD) is disclosed. One of a plurality of magnetic read/write heads in a hard disk drive (HDD) is determined to be disabled, and a fly-height associated with the disabled read/write head is increased with respect to a fly-height associated with the plurality of read/write heads.Type: GrantFiled: August 30, 2007Date of Patent: January 5, 2010Assignee: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Jorge F. Escobar, Steven N. Guilliams, Kris Schouterden
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Publication number: 20090150637Abstract: A data formatting system and method to improve data efficiency and integrity in a hard disk are disclosed. One embodiment provides a disk drive system having a plurality of lookup tables which store a plurality of randomizer seeds which may be dynamically encoded into the preamble field of a customer data block if the customer data is deemed marginal. Encoding the randomizer seed into the preamble field prevents adjacent data track mis-writes and mis-reads.Type: ApplicationFiled: December 6, 2007Publication date: June 11, 2009Inventors: Ryoheita Hattori, David H. Jen, Bernd Lamberts, Remmelt Pit, Kris Schouterden
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Publication number: 20090059413Abstract: A method for increasing reliability of a hard disk drive (HDD) is disclosed. One of a plurality of magnetic read/write heads in a hard disk drive (HDD) is determined to be disabled, and a fly-height associated with the disabled read/write head is increased with respect to a fly-height associated with the plurality of read/write heads.Type: ApplicationFiled: August 30, 2007Publication date: March 5, 2009Inventors: Jorge F. Escobar, Steven N. Guilliams, Kris Schouterden
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Patent number: 7492539Abstract: A method for controlling a burnish cycle to minimize cycle time is disclosed. MR sensor resistance measurements are used to monitor interference with the recording surface and when clearance is not detected, steps are taken to fine tune the interference signal.Type: GrantFiled: March 30, 2004Date of Patent: February 17, 2009Assignee: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Walton Fong, Donald R. Gillis, Vedantham Raman, Kris Schouterden, Mike Suk
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Patent number: 7446966Abstract: A method is presented for writing data to a surface of a magnetic disk in a disk drive. The method includes determining a number of sector groups into which sectors of the data to be written will be grouped, loading registers with current values, kick-latching values, and precompensation values for each of said sector groups, and applying the current values, kick-latching values, and precompensation values for each of the sector groups to the write head while writing data to the sector groups of the recording media.Type: GrantFiled: November 30, 2004Date of Patent: November 4, 2008Assignee: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Indukumar Chenchu Kalahasthi, Quan-chiu Harry Lam, Guo Mian, Kris Schouterden, Joseph Emanuel Silva, Christopher David Wiederholt, Douglas M. Zuercher
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Publication number: 20080151418Abstract: Embodiments of the present invention pertain to a tradeoff between reliability and performance for a disk drive. According to one embodiment, a first measurement at a first thermal fly height control (TFC) heater level that provides low reliability for a parameter and a second measurement at a second TFC heater level that provides low performance for the parameter are determined. The first measurement and the second measurement are used to determine if there is a third TFC heater level that at least satisfies a criteria for the parameter whereby the tradeoff between the reliability and the performance for the disk drive is enabled.Type: ApplicationFiled: December 20, 2006Publication date: June 26, 2008Inventors: Paul Cisewski, Ryohheita Hattori, Kris Schouterden, Jerome Venneman
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Publication number: 20060114587Abstract: A method is presented for writing data to a surface of a magnetic disk in a disk drive. The method includes determining a number of sector groups into which sectors of the data to be written will be grouped, loading registers with current values, kick-latching values, and precompensation values for each of said sector groups, and applying the current values, kick-latching values, and precompensation values for each of the sector groups to the write head while writing data to the sector groups of the recording media.Type: ApplicationFiled: November 30, 2004Publication date: June 1, 2006Inventors: Indukumar Kalahasthi, Quan-chiu Lam, Guo Mian, Kris Schouterden, Joseph Silva, Christopher Wiederholt, Douglas Zuercher