L2P table management method, data reading method, device and equipment

Abstract

The invention discloses an L2P table management method, a data reading method, device and equipment thereof. The method comprises the following steps of when storing the target data, determining a corresponding logical address and a corresponding physical address; buffering a mapping between the logical address and the physical address to a secondary table in an SRAM; judging whether the actual content size of the current secondary table is consistent with the storage size of the physical page; if so, migrating the secondary table is to a memory for storage, and recording the storage positionof the secondary table in the memory in the form of a table in the SRAM to obtain a primary table. In the case of SSD without DRAM, only SRAM and the memory can be used to store L2P table reasonably and efficiently through reasonable hierarchical management of L2P table.

Description

technical field [0001] The present application relates to the technical field of data access, and in particular to an L2P table management method, data reading method, device and equipment. Background technique [0002] At present, SSD (that is, Solid State Drives) is a widely used storage hard disk, which has a relatively fast data access speed. The basic unit for users to access the SSD is called a logical page, and the corresponding address is called a logical address (LBA, Logical Block Address). Inside the SSD, the SSD master reads and writes based on the flash page as the basic unit. In flash memory, the flash memory page can also be called a physical page (Physical page). Every time a user writes a data page, the SSD master will find a physical page to write the user data in, and record this mapping relationship for use in the next SSD read. [0003] For a 256GB SSD, if 4KB is used as the logical page size, and the mapping table uses 4 bytes to store the physical ad...

AI Technical Summary

Problems solved by technology

[0005] However, in the prior art, due to cost considerations, some manufacturers did not add DRAM to the SSD. In this case, it is difficult for the SSD to meet the requirements for storing the L2P table, thus affecting the normal reading and writing of data.

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