Invention Grant
- Patent Title: Storage system having RAID stripe metadata
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Application No.: US17153219Application Date: 2021-01-20
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Publication No.: US11593207B2Publication Date: 2023-02-28
- Inventor: Yosef Shatsky , Doron Tal , Rivka Matosevich
- Applicant: EMC IP Holding Company LLC
- Applicant Address: US MA Hopkinton
- Assignee: EMC IP Holding Company LLC
- Current Assignee: EMC IP Holding Company LLC
- Current Assignee Address: US MA Hopkinton
- Agency: Ryan, Mason & Lewis, LLP
- Main IPC: G06F11/00
- IPC: G06F11/00 ; G06F11/10 ; G06F11/30 ; G06F11/14

Abstract:
A processing device obtains a write operation which comprises first data and second data to be stored in first and second strips of a given stripe. The processing device stores the first data in the first strip and determines that the second strip is unavailable. The processing device determines a parity based on the first data and the second data and stores the parity in a parity strip. The processing device updates metadata to indicate that the second data was not stored in the second strip. In some embodiments, the updated metadata is non-persistent and the processing device may be further configured to rebuild the given stripe, update persistent metadata corresponding to a sector of stripes including the given stripe and clear the non-persistent metadata based at least in part on a completion of the rebuild.
Public/Granted literature
- US20220229730A1 STORAGE SYSTEM HAVING RAID STRIPE METADATA Public/Granted day:2022-07-21
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