公开(公告)号：US09916859B2

公开(公告)日：2018-03-13

申请号：US15614903

申请日：2017-06-06

Applicant: SEAGATE TECHNOLOGY LLC

Inventor： Junghwan Shin ,  Jae Ik Song ,  Dong Hyuck Shin ,  Eun Yeong Hong

IPC: G11B27/36 ,  G11B5/02 ,  G11B20/18

CPC classification number: G11B20/1816 ,  G11B2020/1823 ,  G11B2020/1826 ,  G11B2020/183

Abstract: 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.

公开(公告)号：US09711177B1

公开(公告)日：2017-07-18

申请号：US15170762

申请日：2016-06-01

Applicant: SEAGATE TECHNOLOGY LLC

Inventor： Junghwan Shin ,  Jae Ik Song ,  Dong Hyuck Shin ,  Eun Yeong Hong

IPC: G11B27/36 ,  G11B5/09 ,  G11B20/18

CPC classification number: G11B20/1816 ,  G11B2020/1823 ,  G11B2020/1826 ,  G11B2020/183

Abstract: 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.

公开(公告)号：US10121511B2

公开(公告)日：2018-11-06

申请号：US15887338

申请日：2018-02-02

Applicant: SEAGATE TECHNOLOGY LLC

Inventor： Junghwan Shin ,  Jae Ik Song ,  Dong Hyuck Shin ,  Eun Yeong Hong

IPC: G11B27/36 ,  G11B20/18

Abstract: 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.

公开(公告)号：US09785377B2

公开(公告)日：2017-10-10

申请号：US14533891

申请日：2014-11-05

Applicant: SEAGATE TECHNOLOGY LLC

Inventor： Junghwan Shin ,  Suhwan Kim ,  Dong Hyuck Shin

IPC: G06F12/00 ,  G06F3/06

CPC classification number: G06F3/0653 ,  G06F3/0604 ,  G06F3/0674

Abstract: 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.