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公开(公告)号：US20180188981A1
公开(公告)日：2018-07-05
申请号：US15394560
申请日：2016-12-29
Applicant: Western Digital Technologies, Inc.
Inventor： Parvaneh Alavi , Hung-min Chang , Haining Liu , Jerry Lo , Hung-Cheng Yeh
CPC classification number: G06F3/0679 , G06F3/0616 , G06F3/064 , G06F11/004 , G06F2201/81 , G06F2201/88 , G11C16/0483 , G11C16/08 , G11C16/26 , G11C16/3418 , G11C16/3427 , G11C16/3431 , G11C16/349
Abstract: Aspects of the disclosure provide methods and apparatus that monitor and mitigate Read Disturb errors in non-volatile memory (NVM) devices such as NAND flash memories. The disclosed methods and apparatus determine which logical block addresses (LBAs) in the NVM device are frequently accessed by a host, rather than looking a physical address accesses. The potential Read Disturb errors may then be mitigated by triggering Read Disturb mitigation when the numbers of access of one or more of the frequently accessed LBAs exceeds a predefined number of accesses.
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Patent Agency Ranking
公开(公告)号：US10372382B2
公开(公告)日：2019-08-06
申请号：US15394560
申请日：2016-12-29
Applicant: Western Digital Technologies, Inc.
Inventor： Parvaneh Alavi , Hung-min Chang , Haining Liu , Jerry Lo , Hung-Cheng Yeh
Abstract: Aspects of the disclosure provide methods and apparatus that monitor and mitigate Read Disturb errors in non-volatile memory (NVM) devices such as NAND flash memories. The disclosed methods and apparatus determine which logical block addresses (LBAs) in the NVM device are frequently accessed by a host, rather than looking a physical address accesses. The potential Read Disturb errors may then be mitigated by triggering Read Disturb mitigation when the numbers of access of one or more of the frequently accessed LBAs exceeds a predefined number of accesses.
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公开(公告)号：US20180181300A1
公开(公告)日：2018-06-28
申请号：US15388603
申请日：2016-12-22
Applicant: Western Digital Technologies, Inc.
Inventor： Richard David Barndt , Hung-min Chang , Aldo Giovanni Cometti , Jerry Lo , Hung-Cheng Yeh
Abstract: Aspects of the disclosure provide a method and an apparatus that perform a background media scan (BGMS) with improved efficiency. In particular, the disclosed BGMS processes can monitor data retention performance of a large capacity solid state drive (SSD) without significantly increasing scanning overhead by scanning only some sample pages of a memory block.
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4.发明授权公开(公告)号：US10545810B2
公开(公告)日：2020-01-28
申请号：US15388603
申请日：2016-12-22
Applicant: Western Digital Technologies, Inc.
Inventor： Richard David Barndt , Hung-min Chang , Aldo Giovanni Cometti , Jerry Lo , Hung-Cheng Yeh
Abstract: Aspects of the disclosure provide a method and an apparatus that perform a background media scan (BGMS) with improved efficiency. In particular, the disclosed BGMS processes can monitor data retention performance of a large capacity solid state drive (SSD) without significantly increasing scanning overhead by scanning only some sample pages of a memory block.
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公开(公告)号：US09971515B2
公开(公告)日：2018-05-15
申请号：US15264391
申请日：2016-09-13
Applicant: Western Digital Technologies, Inc.
Inventor： Hung-Min Chang , Haining Liu , Yuriy Pavlenko , Hung-Cheng Yeh
IPC: G06F3/06
CPC classification number: G06F3/061 , G06F3/0616 , G06F3/064 , G06F3/0655 , G06F3/0688
Abstract: In general, a storage device may perform an incremental background media scan. The storage device includes a data storage portion comprising a plurality of blocks. The storage device also includes a controller configured to perform the scan to determine whether to perform maintenance on the page. As such, the controller may scan a first page of a first block of a set of blocks. Each block has multiple pages. The controller may, for each respective remaining block of the set, scan a respective first page of the respective remaining block, the first page having a same first index as the respective first page. The controller may further scan a second page of the first block. The controller may then, for each respective remaining block of the set, scan a respective second page of the respective remaining block, the second page having a same second index as the respective second page.
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公开(公告)号：US20180074701A1
公开(公告)日：2018-03-15
申请号：US15264391
申请日：2016-09-13
Applicant: Western Digital Technologies, Inc.
Inventor： Hung-Min Chang , Haining Liu , Yuriy Pavlenko , Hung-Cheng Yeh
IPC: G06F3/06
CPC classification number: G06F3/061 , G06F3/0616 , G06F3/064 , G06F3/0655 , G06F3/0688
Abstract: In general, a storage device may perform an incremental background media scan. The storage device includes a data storage portion comprising a plurality of blocks. The storage device also includes a controller configured to perform the scan to determine whether to perform maintenance on the page. As such, the controller may scan a first page of a first block of a set of blocks. Each block has multiple pages. The controller may, for each respective remaining block of the set, scan a respective first page of the respective remaining block, the first page having a same first index as the respective first page. The controller may further scan a second page of the first block. The controller may then, for each respective remaining block of the set, scan a respective second page of the respective remaining block, the second page having a same second index as the respective second page.
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