Storage unit management method and system

Abstract

The present invention discloses a management method and a system for a storage unit. The method and the system are used for managing a storage unit comprising a plurality of entity blocks. Each entity block is provided with one of a plurality of block type definitions. Firstly, at least one first writing command which is required, corresponding to at least one logic page of at least one logic block, to carry out data writing operation, is obtained. The fact that whether a candidate block provided with a first block definition of the plurality of block type definitions is existed in the storage unit is judged and the logic page of the first block definition logic block can not be mapped to the candidate block. If the candidate block is existed, the first block definition is converted into a second block definition of the block type definitions. Data is written into a special page of a candidate block having the second block definition. A mapping relationship is recorded between the logic page of the logic block and the special page of the candidate block. The method and the system are capable of carrying out classification management for the entity blocks of the storage unit, thereby more effectively utilizing the storage unit.

Description

technical field [0001] The present invention relates to a storage unit management method and system, and in particular to a storage unit management method and system capable of classifying and managing physical blocks of a storage unit. Background technique [0002] When performing storage management on a storage unit, such as a non-volatile memory, data is usually stored and located according to modes such as Page Mapping and Block Mapping. [0003] In the page mapping mode, the data in the storage unit is stored in units of logical pages and has a corresponding page mapping table. In the page mapping table, a logical page is used as an index, and a physical page is used as an entry (item content). When a storage system using page mapping is used to process read and write commands, the page mapping table can be directly searched and updated to complete the location of relevant data pages. In the block mapping mode, the data in the storage unit is stored in units of logica...

AI Technical Summary

Problems solved by technology

Although the storage management system with hybrid mapping mode can provide greater flexibility to store data, however, in actual use, there will still be many unused entities in the corresponding block mapping and page mapping physical blocks in the storage unit page, which makes the distribution of data in the storage unit very complex and messy

Similarly, the performance burden of the system will also be caused when related data is merged

Images