Memory management and write-in method, memory controller and storage system

Abstract

The invention provides a memory management and write-in method, a memory controller and a storage system. The memory management and write-in method is used for managing a plurality of entity units of a memory chip. The method comprises the following steps of: grouping the entity units into first and second entity unit groups, and recording and calculating the first erasing times corresponding to the first entity unit group and the second erasing times corresponding to the second entity unit group; and calculating the erasing times difference between the first erasing times and the second erasing times. The method also comprises a step of judging whether the erasing times difference is greater than the erasing times difference threshold value when a host write-in instruction is received. Moreover, when the average erasing times difference is greater than the erasing times difference threshold value is judged, the method also comprises a step of executing a switching write-in program to write the data corresponding to the host write-in instruction to the memory chip. Therefore, the service life of the memory chip can be effectively prolonged.

Description

technical field [0001] The invention relates to a storage management and writing method, a rewritable non-volatile storage controller and a rewritable non-volatile storage system using the method. Background technique [0002] The rapid growth of digital cameras, mobile phones, and MP3 players has led to a rapid increase in consumer demand for storage media. Because rewritable non-volatile memory (rewritable non-volatile memory) has the characteristics of data non-volatility, power saving, small size, and no mechanical structure, it is suitable for portable applications, and is most suitable for this type of portable battery. powered product. A solid state drive is a storage device that uses a rewritable non-volatile memory as a storage medium. Due to its small size and large capacity, the rewritable non-volatile memory has been widely used for storing important personal data. Therefore, the rewritable non-volatile memory industry has become a very popular part of the ele...

AI Technical Summary

Problems solved by technology

[0006] The writing and erasing times of the physical unit (or physical block) of the rewritable non-volatile memory are limited (for example, 10,000 times). In particular, since the physical unit stores data in a rotating manner, when After some physical units are worn out, even other physical units can still be used, but this rewritable non-volatile memory s

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