Patents by Inventor Dong Hyuck Shin
Dong Hyuck Shin 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: 10121511Abstract: Systems and methods for forward corrupted track detection and by-pass are described. In one embodiment, a storage system comprising a storage controller performs a read operation for a target track of a shingled magnetic recording (SMR) disk drive and detects a read operation failure of the read operation for the target track. The storage controller also performs a boundary track read operation on one or more tracks including or adjacent to the target track and detect a forward corruption area based on the boundary track read operation. In another embodiment, a method is provided that includes detecting a read operation failure of a read operation for a track of a disk drive and performing a boundary track read operation on one or more tracks including or adjacent to the target track. The method also includes detecting a forward corruption area based on the boundary track read operation.Type: GrantFiled: February 2, 2018Date of Patent: November 6, 2018Assignee: SEAGATE TECHNOLOGY LLCInventors: Junghwan Shin, Jae Ik Song, Dong Hyuck Shin, Eun Yeong Hong
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Publication number: 20180182433Abstract: Systems and methods for forward corrupted track detection and by-pass are described. In one embodiment, a storage system comprising a storage controller performs a read operation for a target track of a shingled magnetic recording (SMR) disk drive and detects a read operation failure of the read operation for the target track. The storage controller also performs a boundary track read operation on one or more tracks including or adjacent to the target track and detect a forward corruption area based on the boundary track read operation. In another embodiment, a method is provided that includes detecting a read operation failure of a read operation for a track of a disk drive and performing a boundary track read operation on one or more tracks including or adjacent to the target track. The method also includes detecting a forward corruption area based on the boundary track read operation.Type: ApplicationFiled: February 2, 2018Publication date: June 28, 2018Applicant: SEAGATE TECHNOLOGY LLCInventors: JUNGHWAN SHIN, JAE IK SONG, DONG HYUCK SHIN, EUN YEONG HONG
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Patent number: 9916859Abstract: Systems and methods for forward corrupted track detection and by-pass are described. In one embodiment, a storage system comprising a storage controller performs a read operation for a target track of a shingled magnetic recording (SMR) disk drive and detects a read operation failure of the read operation for the target track. The storage controller also performs a boundary track read operation on one or more tracks including or adjacent to the target track and detect a forward corruption area based on the boundary track read operation. In another embodiment, a method is provided that includes detecting a read operation failure of a read operation for a track of a disk drive and performing a boundary track read operation on one or more tracks including or adjacent to the target track. The method also includes detecting a forward corruption area based on the boundary track read operation.Type: GrantFiled: June 6, 2017Date of Patent: March 13, 2018Assignee: SEAGATE TECHNOLOGY LLCInventors: Junghwan Shin, Jae Ik Song, Dong Hyuck Shin, Eun Yeong Hong
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Publication number: 20170364304Abstract: Methods, apparatuses, systems, and devices are described for determining use of areas of a disk drive. In one method, a score of an area node of the disk drive may be increased each time the area node is accessed during a time interval of a series of time intervals. When each time interval elapses, each existing score of the area nodes (e.g., scores of area nodes that have non-zero scores) may be decreased. Further, after being decreased, each existing score may be saved. In such a manner, a time series analysis of data accesses may be implemented. The increases in score may account for the number of accesses during a given interval, and the decreases in score may account for time passage (e.g., time-weighting the scores). Thus, more frequent accesses and more recent accesses result in higher accumulated scores for the corresponding area nodes.Type: ApplicationFiled: September 7, 2017Publication date: December 21, 2017Applicant: SEAGATE TECHNOLOGY LLCInventors: JUNGHWAN SHIN, SUHWAN KIM, DONG HYUCK SHIN
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Publication number: 20170352377Abstract: Systems and methods for forward corrupted track detection and by-pass are described. In one embodiment, a storage system comprising a storage controller performs a read operation for a target track of a shingled magnetic recording (SMR) disk drive and detects a read operation failure of the read operation for the target track. The storage controller also performs a boundary track read operation on one or more tracks including or adjacent to the target track and detect a forward corruption area based on the boundary track read operation. In another embodiment, a method is provided that includes detecting a read operation failure of a read operation for a track of a disk drive and performing a boundary track read operation on one or more tracks including or adjacent to the target track. The method also includes detecting a forward corruption area based on the boundary track read operation.Type: ApplicationFiled: June 6, 2017Publication date: December 7, 2017Applicant: SEAGATE TECHNOLOGY LLCInventors: JUNGHWAN SHIN, JAE IK SONG, DONG HYUCK SHIN, EUN YEONG HONG
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Patent number: 9785377Abstract: Methods, apparatuses, systems, and devices are described for determining use of areas of a disk drive. In one method, a score of an area node of the disk drive may be increased each time the area node is accessed during a time interval of a series of time intervals. When each time interval elapses, each existing score of the area nodes (e.g., scores of area nodes that have non-zero scores) may be decreased. Further, after being decreased, each existing score may be saved. In such a manner, a time series analysis of data accesses may be implemented. The increases in score may account for the number of accesses during a given interval, and the decreases in score may account for time passage (e.g., time-weighting the scores). Thus, more frequent accesses and more recent accesses result in higher accumulated scores for the corresponding area nodes.Type: GrantFiled: November 5, 2014Date of Patent: October 10, 2017Assignee: SEAGATE TECHNOLOGY LLCInventors: Junghwan Shin, Suhwan Kim, Dong Hyuck Shin
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Patent number: 9711177Abstract: Systems and methods for forward corrupted track detection and by-pass are described. In one embodiment, a storage system comprising a storage controller performs a read operation for a target track of a shingled magnetic recording (SMR) disk drive and detects a read operation failure of the read operation for the target track. The storage controller also performs a boundary track read operation on one or more tracks including or adjacent to the target track and detect a forward corruption area based on the boundary track read operation. In another embodiment, a method is provided that includes detecting a read operation failure of a read operation for a track of a disk drive and performing a boundary track read operation on one or more tracks including or adjacent to the target track. The method also includes detecting a forward corruption area based on the boundary track read operation.Type: GrantFiled: June 1, 2016Date of Patent: July 18, 2017Assignee: SEAGATE TECHNOLOGY LLCInventors: Junghwan Shin, Jae Ik Song, Dong Hyuck Shin, Eun Yeong Hong
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Patent number: 9373347Abstract: Implementations disclosed herein provide systems and methods for data write management in a storage device responsive to detection of a disturbance. Responsive to the detection of the disturbance, a write operation is paused and a transducer head is moved from a first position on the target data track to a second position separated from the first position by at least one data track. At the second position, the write operation is resumed.Type: GrantFiled: March 28, 2014Date of Patent: June 21, 2016Assignee: SEAGATE TECHNOLOGY LLCInventors: Daniel Suhwan Kim, Jae Ik Song, Dong Hyuck Shin
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Publication number: 20160124681Abstract: Methods, apparatuses, systems, and devices are described for determining use of areas of a disk drive. In one method, a score of an area node of the disk drive may be increased each time the area node is accessed during a time interval of a series of time intervals. When each time interval elapses, each existing score of the area nodes (e.g., scores of area nodes that have non-zero scores) may be decreased. Further, after being decreased, each existing score may be saved. In such a manner, a time series analysis of data accesses may be implemented. The increases in score may account for the number of accesses during a given interval, and the decreases in score may account for time passage (e.g., time-weighting the scores). Thus, more frequent accesses and more recent accesses result in higher accumulated scores for the corresponding area nodes.Type: ApplicationFiled: November 5, 2014Publication date: May 5, 2016Applicant: SEAGATE TECHNOLOGY LLCInventors: JUNGHWAN SHIN, SUHWAN KIM, DONG HYUCK SHIN
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Publication number: 20150279395Abstract: Implementations disclosed herein provide systems and methods for data write management in a storage device responsive to detection of a disturbance. Responsive to the detection of the disturbance, a write operation is paused and a transducer head is moved from a first position on the target data track to a second position separated from the first position by at least one data track. At the second position, the write operation is resumed.Type: ApplicationFiled: March 28, 2014Publication date: October 1, 2015Applicant: Seagate Technology LLCInventors: Daniel Suhwan Kim, Jae Ik Song, Dong Hyuck Shin