SSD data physical backup method and device, electronic device and storage medium

Abstract

The invention relates to an SSD data physical backup method and device, an electronic device and a storage medium. The method comprises: acquiring a first command; returning physical composition information of the SSD according to the first command; obtaining a second command; processing the internal data of the SSD according to the second command to obtain to-be-backed-up data; feeding back the to-be-backed-up data to a file corresponding to the host; judging whether the internal data of the SSD is backed up or not; and if not, returning to obtain the second command. According to the method, physical backup is carried out on the internal data of the SSD, so that the requirement of a special scene is met, fault analysis or debugging can be carried out, subsequent failure analysis, fault reproduction and other applications can be carried out based on the backup data, and the reliability of the SSD is greatly improved.

Description

technical field [0001] The present invention relates to a solid-state hard disk, and more specifically refers to an SSD data physical backup method, device, computer equipment and storage medium. Background technique [0002] SSD (Solid State Drive) has been widely used in various occasions, and is gradually replacing traditional hard disks due to its excellent performance, power consumption, and environmental adaptability. [0003] Due to the erase and write characteristics of NAND, the data cannot be directly modified at the saved physical address, and the NAND address needs to be reassigned to write new data. In order to track the latest data written by the host, a logic-to-physical address table is required to maintain this mapping. relation. The flow of the whole read command is as follows figure 1 As shown, the host submits the read command to the front-end module of the SSD; the SSD front-end module divides the command into mapping units; submits the operation reque...

AI Technical Summary

Problems solved by technology

[0005] The host accesses the internal data of the SSD based on the logical address, and the SSD converts it into a physical address according to the mapping table relationship for data access. In addition to user data, NAND also stores some system data, which cannot be accessed. In special scenarios , in order to perform fault analysis or debugging, it is necessary to deeply analyze all the data on the NAND, that is, when the host accesses through the logical address, it can only access part of the data area, if and only if it stores the latest valid user data; Information data and error correction data cannot be accessed, and fault analysis or scene reconstruction cannot be performed

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