A storage method, device, equipment and storage medium for ssd bad block table

Abstract

The invention discloses a storage method for an SSD bad block table. When it is detected that an increasing bad block occurs during the operation of the SSD, the increasing bad block is added to the sub-bad block table to which it currently belongs; triggering all the sub-bad blocks The sub-bad block table is stored; wherein, the sub-bad block table is obtained by splitting the global bad block table according to the space partition. The table is saved. This application manages and saves the bad block table according to the method of space partitioning, and can add the growing bad block to the sub-bad block table of each space partition in time when an increasing bad block is detected, and trigger all sub-bad blocks The table is saved. This application avoids the possibility of unsuccessfully fetching the bad block table in the DDR when abnormal power failure occurs, and enhances the stability and reliability of the SSD. In addition, the present application also provides a storage device, equipment and computer-readable storage medium of an SSD bad block table having the above-mentioned technical effects.

Description

technical field [0001] The present invention relates to the field of storage technology, in particular to a storage method, device, equipment and computer-readable storage medium of an SSD bad block table. Background technique [0002] Bad block (abbreviated as bad block) is a block in SSD that has been damaged and can no longer be read and written. There are two types of factory bad blocks and growth bad blocks. The factory bad block is the bad block that comes with the NAND particle when it leaves the factory, and the manufacturer will make a special mark. Growth bad block refers to the block that loses read and write functions due to excessive wear and tear of normal block during the use of SSD. SSDs need to avoid bad blocks for reading and writing during use, so bad blocks need to be managed and saved. When the SSD is powered on for the first time, the entire disk block is in the factory erased state, and all the blocks are scanned in the entire disk, and the bad block...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a storage method, device, equipment and computer-readable storage medium for an SSD bad block table, so as to solve the problem that the existing bad block table does not write the latest bad block table before the power is exhausted, which affects the SSD. problem of use

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