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公开(公告)号：US11133032B1
公开(公告)日：2021-09-28
申请号：US17075354
申请日：2020-10-20
Applicant: Seagate Technology LLC
Inventor： Jung Wook Hur , Lin Thi Lin , Kang Hai Lim , Teng Hou Chua , XueYi Miao , Zhi Ye
Abstract: A method includes detecting a read error during a first read operation by a read sensor on a first track on a data storage medium. The method also includes, after the read error is detected, performing a second read operation by the read sensor on the first track, carrying out bit error value (BEV) measurements for the second read operation, and determining, from the BEV measurements, whether the read sensor produces a marginal BEV, which is between first and second predetermined BEV thresholds. In response to determining that the read sensor produces the marginal BEV, a third read operation by the read sensor on the first track is carried out, and BEV measurements for the third read operation are performed. When the BEV measurements from the second and third read operations meet at least one predetermined read sensor instability criterion, it is concluded that the read sensor is unstable.
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公开(公告)号：US10896091B2
公开(公告)日：2021-01-19
申请号：US16426773
申请日：2019-05-30
Applicant: Seagate Technology LLC
Inventor： Wei Zhang , Xiong Liu , Choon Wei Ng , Zhi Ye
Abstract: A method includes storing a superset of data on a data storage medium along with a corresponding superset superparity. The superset of data includes multiple sets of data, and the corresponding superset superparity is calculated based on all of the multiple sets of data. The method also includes updating at least one subset of the superset of data. The subset has a subset superparity. The superset superparity is updated with the subset superparity, and the subset superparity and a location of the subset within the superset are employed to carry out error correction operations.
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公开(公告)号：US20200379845A1
公开(公告)日：2020-12-03
申请号：US16426773
申请日：2019-05-30
Applicant: Seagate Technology LLC
Inventor： Wei Zhang , Xiong Liu , Choon Wei Ng , Zhi Ye
Abstract: A method includes storing a superset of data on a data storage medium along with a corresponding superset superparity. The superset of data includes multiple sets of data, and the corresponding superset superparity is calculated based on all of the multiple sets of data. The method also includes updating at least one subset of the superset of data. The subset has a subset superparity. The superset superparity is updated with the subset superparity, and the subset superparity and a location of the subset within the superset are employed to carry out error correction operations.
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