Method for realizing wear-leveling in storage equipment as well as the storage equipment

Abstract

The invention discloses a method for realizing wear-leveling in storage equipment as well as the storage equipment. The method comprises the following steps: determining that a storage unit has a bad block, recording the corresponding logic address when the bad block occurs in the storage unit which has the bad block, or after the number of recorded erasing times is cleared each time, starting torecord the number of erasing times of the storage unit identified by a physical address corresponding to the logic address currently, wherein the current corresponding relationship between the physical addresses of the storage unit and the logic addresses is stored in the storage equipment; selecting a storage unit from the storage units which do not have bad blocks when the number of recorded erasing times reaches a set threshold, updating the physical address corresponding to the logic address currently into the physical address of the storage unit selected from the storage units which do not have bad blocks; and clearing the number of recorded erasing times. The storage unit with excessive erasing times is effectively prevented from being broken by recording the number of erasing timesof the logic storage unit which has the bad block, so that the service life of the storage equipment is improved.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method for realizing wear balance in a storage device and the storage device. Background technique [0002] NOR Flash technology is a commonly used flash memory technology at present. With this technology, it can be read and written quickly by byte. However, after each byte is written, it cannot be written again directly, but the previously written data must be first written. erase. When using NOR Flash technology for erasing, the erasing operation can only be performed in units of pages, and the general page size is 256 bytes. From the perspective of the upper layer, the function of erasing is to reset every bit in the erased page to logic 1. [0003] The service life of NOR Flash is very limited, which is determined by the maximum number of erasable pages in NOR Flash. As the number of erasing increases, the page will eventually become read-only and become a ...

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a method for achieving wear leveling in a storage device and a storage device to solve the problem of some storage units in the prior art due to excessive erasing and writing times. It is easy to be damaged by writing, resulting in a very limited service life of the storage device

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