Invention Grant
- Patent Title: Operation-deterministic write operations for data recovery and integrity checks
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Application No.: US16916019Application Date: 2020-06-29
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Publication No.: US11620234B2Publication Date: 2023-04-04
- Inventor: Mark J. Dancho , Robert Ellis , Kevin O'Toole
- Applicant: WESTERN DIGITAL TECHNOLOGIES, INC.
- Applicant Address: US CA San Jose
- Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
- Current Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
- Current Assignee Address: US CA San Jose
- Agency: ArentFox Schiff LLP
- Main IPC: G06F12/1009
- IPC: G06F12/1009

Abstract:
Aspects of a storage device including a memory and a controller are provided that allow for storage of tags identifying data types and sequence numbers with data to facilitate data recovery and system integrity checks following a power failure or other system failure event. The controller is configured during a write operation to include a tag in the data identifying the data type as a host write, a recycle write, or another internal write. Following a system failure event, the controller is configured to read the tags to identify the data type in the write. Based on the tags, the controller is configured to properly rebuild or update a logical-to-physical (L2P) table of the storage device to assign correct logical addresses to the most recent data during data recovery, as well as to verify correct logical addresses during system integrity checks.
Public/Granted literature
- US20210406193A1 Operation-Deterministic Write Operations For Data Recovery And Integrity Checks Public/Granted day:2021-12-30
Information query
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