Patents by Inventor Ajaykumar Rajasekharan
Ajaykumar Rajasekharan 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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Publication number: 20190042744Abstract: A method of detecting the onset of a ransomware attack is presented. In an example embodiment, file backup metadata for each of a plurality of computing devices is accessed and analyzed to detect anomalous file backup activity of individual ones of the computing devices. A determination is made as to whether the detected anomalous file backup activity of at least some of the computing devices is correlated in time. File description metadata for each of the computing devices is also accessed and analyzed to identify files in the computing devices that are anomalous to other files in the computing devices. A determination whether a ransomware attack has begun is based on a determination that the detected anomalous file backup activity of at least some of the computing devices is correlated in time, as well as on the identified anomalous files.Type: ApplicationFiled: August 2, 2017Publication date: February 7, 2019Inventors: Ajaykumar Rajasekharan, Matthew Mills Parker, Daniel L. Sullivan
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Publication number: 20170308429Abstract: Methods, systems, and devices are described for providing proactive cloud orchestration services for a cloud hardware infrastructure. A health management system may monitor component(s) of the cloud hardware infrastructure. The health management system may determine a failure probability metric for the component(s) based on the monitoring of the component and in consideration of historical information associated with the component, or similar components. The health management system may determine an optimization strategy for the component and, when an optimization decision has been reached, initiate a reconfiguration procedure to implement the optimization strategy. The optimization strategy may provide for mitigating or eliminating the consequences of the component failure associated with data loss, downtime, and the like.Type: ApplicationFiled: July 11, 2017Publication date: October 26, 2017Applicant: SEAGATE TECHNOLOGY LLCInventors: AJAYKUMAR RAJASEKHARAN, CHRISTIAN BRUNN MADSEN, Andrei KHURSHUDOV
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Patent number: 9727432Abstract: Apparatus and method for accelerated testing of a multi-device storage system. In some embodiments, the storage system includes a server adapted to communicate with a user device, and a plurality of data storage devices adapted to store and retrieve data objects from the user device. The server maintains a map structure that describes the data objects stored on the data storage devices. A fault injection module is adapted to induce simulated failures of selected data storage devices in relation to a time-varying failure rate distribution associated with the data storage devices that indicates an observed failure rate over a first time interval. The simulated failures are induced by the fault injection module over a second time interval shorter than the first time interval. The server operates to modify the map structure responsive to the simulated failures.Type: GrantFiled: October 9, 2014Date of Patent: August 8, 2017Assignee: Seagate Technology LLCInventors: Craig F. Cutforth, Ajaykumar Rajasekharan, Rajaram Singaravelu
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Patent number: 9720763Abstract: Methods, systems, and devices are described for providing proactive cloud orchestration services for a cloud hardware infrastructure. A health management system may monitor component(s) of the cloud hardware infrastructure. The health management system may determine a failure probability metric for the component(s) based on the monitoring of the component and in consideration of historical information associated with the component, or similar components. The health management system may determine an optimization strategy for the component and, when an optimization decision has been reached, initiate a reconfiguration procedure to implement the optimization strategy. The optimization strategy may provide for mitigating or eliminating the consequences of the component failure associated with data loss, downtime, and the like.Type: GrantFiled: March 9, 2015Date of Patent: August 1, 2017Assignee: SEAGATE TECHNOLOGY LLCInventors: Ajaykumar Rajasekharan, Christian Brunn Madsen, Andrei Khurshudov
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Publication number: 20170032809Abstract: A slider that includes a leading edge surface; a trailing edge surface; and an air bearing surface (ABS) positioned between the leading edge surface and the trailing edge surface, wherein the trailing edge surface includes a read-write element, at least one low surface energy region and at least one high surface energy region.Type: ApplicationFiled: September 19, 2016Publication date: February 2, 2017Inventors: Ajaykumar Rajasekharan, Gary Kunkel, David J. Ellison, Narayanan Ramakrishnan
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Patent number: 9552836Abstract: The present invention is directed to a slider that includes at least one fluid pathway that is in fluid communication with an air bearing face and/or the trailing edge face of the slider. The at least one fluid pathway is configured to propel/transport a fluid such as a lubricant toward at least one side face via capillary action. The present invention is also directed to related apparatuses and methods.Type: GrantFiled: December 23, 2013Date of Patent: January 24, 2017Assignee: SEAGATE TECHNOLOGY LLCInventors: Narayanan Ramakrishnan, Ajaykumar Rajasekharan
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Patent number: 9449630Abstract: A slider that includes a leading edge surface; a trailing edge surface; and an air bearing surface (ABS) positioned between the leading edge surface and the trailing edge surface, wherein the trailing edge surface includes a read-write element, at least one low surface energy region and at least one high surface energy region.Type: GrantFiled: June 2, 2015Date of Patent: September 20, 2016Assignee: Seagate Technology LLCInventors: Ajaykumar Rajasekharan, Gary J. Kunkel, David J. Ellison, Narayanan Ramakrishnan
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Publication number: 20160266962Abstract: Methods, systems, and devices are described for providing proactive cloud orchestration services for a cloud hardware infrastructure. A health management system may monitor component(s) of the cloud hardware infrastructure. The health management system may determine a failure probability metric for the component(s) based on the monitoring of the component and in consideration of historical information associated with the component, or similar components. The health management system may determine an optimization strategy for the component and, when an optimization decision has been reached, initiate a reconfiguration procedure to implement the optimization strategy. The optimization strategy may provide for mitigating or eliminating the consequences of the component failure associated with data loss, downtime, and the like.Type: ApplicationFiled: March 9, 2015Publication date: September 15, 2016Applicant: SEAGATE TECHNOLOGY LLCInventors: AJAYKUMAR RAJASEKHARAN, CHRISTIAN BRUNN MADSEN, Andrei KHURSHUDOV
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Publication number: 20160019924Abstract: A slider that includes a leading edge surface; a trailing edge surface; and an air bearing surface (ABS) positioned between the leading edge surface and the trailing edge surface, wherein the trailing edge surface includes a read-write element, at least one low surface energy region and at least one high surface energy region.Type: ApplicationFiled: June 2, 2015Publication date: January 21, 2016Inventors: Ajaykumar Rajasekharan, Gary J. Kunkel, David J. Ellison, Narayanan Ramakrishnan
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Patent number: 9214173Abstract: A slider, such as for a data storage system, the slider having a leading edge, a trailing edge, an air-bearing surface, and a transducer proximate the trailing edge. The slider has a low surface energy coating on the air-bearing surface and a high surface energy coating on the transducer. In some embodiments, the high surface energy coating is present on a contact sensor.Type: GrantFiled: October 16, 2013Date of Patent: December 15, 2015Assignee: SEAGATE TECHNOLOGY LLCInventors: Gary J. Kunkel, David J. Ellison, Ajaykumar Rajasekharan
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Patent number: 9202500Abstract: A slider that includes a slider body, the slider body having a trailing edge surface and an opposing leading edge surface; an air bearing surface (ABS) between the trailing edge surface and the leading edge surface; a read/write head located on the trailing edge surface of the slider body; an electrode array located on the trailing edge surface of the slider body, the electrode array including at least a first electrode and at least a second electrode; and first and second bias circuits, wherein the first bias circuit is electrically coupled to the at least first electrode and the second bias circuit is electrically coupled to the at least second electrode.Type: GrantFiled: December 18, 2014Date of Patent: December 1, 2015Assignee: Seagate Technology LLCInventors: Gary J. Kunkel, Ajaykumar Rajasekharan
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Patent number: 9153256Abstract: A slider, having a leading edge, a trailing edge, a working surface, and read/write heads proximate the trailing edge. The slider includes a protective overcoat over the working surface of the slider, and a self-assembled monolayer coating on the working surface of the slider and over the protective overcoat, the coating comprising at least one self-assembled monolayer material.Type: GrantFiled: July 10, 2013Date of Patent: October 6, 2015Assignee: SEAGATE TECHNOLOGY LLCInventors: Ajaykumar Rajasekharan, David J. Ellison, Qian Guo
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Patent number: 9093098Abstract: An apparatus and associated methodology contemplating a slider body defining longitudinal extents at a leading end and a trailing end. A fluid bearing surface is formed in part by a side rail extending substantially longitudinally along the slider body and joined to a cross rail extending substantially laterally along the slider body. The side rail and the cross rail define at least a portion of a positive pressure recess. A vent is defined in the fluid bearing surface that is in fluid communication with ambient pressure fluid on one side of the side rail but is not in fluid communication with the positive pressure recess on the other side of the side rail.Type: GrantFiled: December 7, 2012Date of Patent: July 28, 2015Assignee: Seagate Technology LLCInventors: Ajaykumar Rajasekharan, Narayanan Ramakrishnan, James Ronald Krolnik
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Publication number: 20150179200Abstract: The present invention is directed to a slider that includes at least one fluid pathway that is in fluid communication with an air bearing face and/or the trailing edge face of the slider. The at least one fluid pathway is configured to propel/transport a fluid such as a lubricant toward at least one side face via capillary action. The present invention is also directed to related apparatuses and methods.Type: ApplicationFiled: December 23, 2013Publication date: June 25, 2015Inventors: Narayanan Ramakrishnan, Ajaykumar Rajasekharan
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Publication number: 20150179201Abstract: A slider that includes a slider body, the slider body having a trailing edge surface and an opposing leading edge surface; an air bearing surface (ABS) between the trailing edge surface and the leading edge surface; a read/write head located on the trailing edge surface of the slider body; an electrode array located on the trailing edge surface of the slider body, the electrode array including at least a first electrode and at least a second electrode; and first and second bias circuits, wherein the first bias circuit is electrically coupled to the at least first electrode and the second bias circuit is electrically coupled to the at least second electrode.Type: ApplicationFiled: December 18, 2014Publication date: June 25, 2015Inventors: Gary J. Kunkel, Ajaykumar Rajasekharan
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Publication number: 20150103444Abstract: A slider, such as for a data storage system, the slider having a leading edge, a trailing edge, an air-bearing surface, and a transducer proximate the trailing edge. The slider has a low surface energy coating on the air-bearing surface and a high surface energy coating on the transducer. In some embodiments, the high surface energy coating is present on a contact sensor.Type: ApplicationFiled: October 16, 2013Publication date: April 16, 2015Applicant: Seagate Technology LLCInventors: Gary J. Kunkel, David J. Ellison, Ajaykumar Rajasekharan
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Publication number: 20150015996Abstract: A slider, having a leading edge, a trailing edge, a working surface, and read/write heads proximate the trailing edge. The slider includes a protective overcoat over the working surface of the slider, and a self-assembled monolayer coating on the working surface of the slider and over the protective overcoat, the coating comprising at least one self-assembled monolayer material.Type: ApplicationFiled: July 10, 2013Publication date: January 15, 2015Inventors: Ajaykumar Rajasekharan, David J. Ellison, Qian Guo
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Patent number: 8810968Abstract: A slider that minimizes lubricant accumulation includes bearing surfaces that provide above ambient fluid pressure, a cavity located between two bearing surfaces and at least one step feature that is spaced apart from the bearing surfaces and is located in and protrudes from a floor of the cavity at a height that is less than a height of the bearing surfaces. The at least one step feature includes surfaces configured to diverge and converge airflow in the cavity.Type: GrantFiled: December 17, 2012Date of Patent: August 19, 2014Assignee: Seagate Technology LLCInventors: Ajaykumar Rajasekharan, Gary J. Kunkel
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Patent number: 8810967Abstract: In certain embodiments, a slider includes an air bearing surface having a cavity. The cavity includes transition features at an upstream side of the cavity to mitigate air flow expansion along the cavity. Turbulence-inducing features are positioned on the transition features.Type: GrantFiled: July 19, 2012Date of Patent: August 19, 2014Assignee: Seagate Technology LLCInventors: Narayanan Ramakrishnan, Ajaykumar Rajasekharan
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Publication number: 20140192440Abstract: An apparatus and associated methodology contemplating a slider body defining longitudinal extents at a leading end and a trailing end. A fluid bearing surface is formed in part by a side rail extending substantially longitudinally along the slider body and joined to a cross rail extending substantially laterally along the slider body. The side rail and the cross rail define at least a portion of a positive pressure recess. A vent is defined in the fluid bearing surface that is in fluid communication with ambient pressure fluid on one side of the side rail but is not in fluid communication with the positive pressure recess on the other side of the side rail.Type: ApplicationFiled: December 7, 2012Publication date: July 10, 2014Applicant: SEAGATE TECHNOLOGY LLCInventors: Ajaykumar Rajasekharan, Narayanan Ramakrishnan, James Ronald Krolnik