A method for backing up ssd user data in internal cache
By introducing SRAM and DDR cache unit initialization and DMA operations into the SSD, efficient backup of SSD user data in the internal cache is achieved, solving sequential write performance and consistency issues and improving the overall performance stability of the SSD.
CN119718208BActive Publication Date: 2026-03-27SHANDONG SINOCHIP SEMICON CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2026-03-27
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Figure CN119718208B_ABST
Abstract
The application provides a backup method of SSD user data in internal cache, which can ensure that the sequential write performance average and performance consistency are not affected after the data backup function of the SSD is started. The method needs to increase a DMA hardware module in the SSD. After the host computer sends a write command to the SSD, SRAM user data cache units and associated DDR user data backup cache units are allocated for the write command. After the host computer completes data transmission to the SSD, the data in the SRAM user data cache units is transmitted to the DDR user data backup cache units, and the data in the SRAM user data cache units is written into a flash memory grain. After the data is transmitted to the flash memory grain data register, the SRAM user data cache units are released and the DDR user data backup cache set information associated with the SRAM user data cache units is updated. When the data is written into the flash memory grain storage medium, the DDR user data backup cache units are released.
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Citation Information
Patent Citations
Solid state disk and write operation method
CN112947869A