Title:
WRITE HOLE PROTECTION METHOD AND SYSTEM FOR RAID, AND STORAGE MEDIUM
Document Type and Number:
WIPO Patent Application WO/2021/072917
Kind Code:
A1
Abstract:
A write hole protection method and system for a RAID, and a storage medium. The method comprises: presetting a log area, and after a RAID is degraded, setting the log area to be in an enabled state; when the log area is in the enabled state, determining, before each stripe write operation, whether a data block of a failed member disk of the RAID in a stripe is a check data block; if the data block is not the check data block, determining whether data blocks to be written of the stripe comprise a data block to be written into the failed member disk; if yes, backing up the data block to be written into the failed member disk in the log area; if not, calculating the data block of the failed member disk and backing up the data block in the log area, or backing up the data blocks to be written in the log area; and when the degraded RAID is started after a failure, performing data recovery using the log area. By using the present solution, the write hole issue of the RAID is avoided.
Inventors:
SHI PEIREN (CN)
Application Number:
PCT/CN2019/121096
Publication Date:
April 22, 2021
Filing Date:
November 27, 2019
Export Citation:
Assignee:
INSPUR SUZHOU INTELLIGENT TECHNOLOGY CO LTD (CN)
International Classes:
G06F3/06; G06F11/10; G06F11/14
Foreign References:
| CN104035830A | 2014-09-10 | |||
| CN106062721B | 2018-11-16 | |||
| CN104881242A | 2015-09-02 | |||
| CN104407821A | 2015-03-11 | |||
| CN109725831A | 2019-05-07 |
Attorney, Agent or Firm:
UNITALEN ATTORNEYS AT LAW (CN)
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