NAND flash device, storage table management method and device and storage medium

Abstract

The embodiment of the invention discloses an NAND flash device, a storage table management method and device thereof, equipment and a storage medium. The NAND flash device comprises a physical block and a storage table stored in the physical block. The storage table comprises a first-level table, a second-level table, a third-level table and a fourth-level table according to the updating frequencyof an information table from low to high. The first-level table is a system table, the second-level table comprises a root table and a metadata table, and the third-level table at least comprises anidle table and a section table. The four-level table comprises a plurality of zone tables, and only the system table is stored in a plurality of physical blocks specified by the boot rule. The systemtable is used for recording and storing the block address of the physical block of the secondary table, the root table is used for recording and storing the block address of the physical block of thesection table, the section table is used for recording the page address of the storage page of the storage area table, and the metadata table is used for recording and storing the block address of thephysical block of the idle table. According to the invention, the updating frequency of the system table is reduced, and the consumption of storage blocks of the system table is reduced.

Description

technical field [0001] The embodiments of the present invention relate to the field of storage technology, and in particular, to a NAND flash device, a storage table management method, equipment and a storage medium. Background technique [0002] The system table is very important system data in the NAND firmware (Firmware, FW), which records the physical addresses of all system data storage blocks. When the storage device is powered on, it is first necessary to rebuild the system table into the Random Access Memory (RAM) through the function of the Rebuild module. Subsequent updates and normal operation of the firmware must be based on the information guidance of the system table. The system table records the physical block information of the root table, firmware code and metadata table. In addition to recording some important system configuration information, the root table also records the physical block address information of the section table; the section table records...

AI Technical Summary

Problems solved by technology

[0004] However, there are the following defects in the prior art: 1. The block addresses of each table are managed uniformly in the system table, the logic is simple and easy to implement, but due to the frequent updates of the area table and the free table, the corresponding table block addresses are frequently changed Writing to the system block, and the rules of the NAND controller have been solidified. During the entire life of the NAND storage device, at the beginning of power-on, the physical storage blocks specified in the rules must be scanned to obtain the system table, and frequently written The system table consumes a lot of physical storage blocks stipulated in the startup rules, which can easily cause damage to physical storage blocks, thus affecting the service life of NAND storage devices

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