Method for writing data in solid-state hard-disk and device thereof

Abstract

The embodiment of the invention relates to a method for writing data in solid-state hard-disk and a device thereof. The method comprises the following steps: updating count values, and using the updated count values for identifying logical block address information which corresponds with current data to be written; and writing the current data to be written, the logical block address information and the updated count values into a target physical block. The embodiment of the invention maintains the logical block address information and the count values, and writes the data, the logical block address information and the updated count values into the target physical block after the count values are updated. If a mapping table is lost or damaged, the fact that the pages corresponding to the logical block address information of the updated count values or section data is effective can be learnt in a data reconstructing process, so that data reconstruction of the whole disk can be realized, and the reliability of SSD can be improved.

Description

technical field [0001] The invention relates to the technical field of data storage, in particular to a method and device for writing data into a solid-state hard disk. Background technique [0002] At present, the mainstream Solid State Disk (SSD) uses NAND flash memory (NAND FLASH) chips as the storage medium, which has the advantages of fast access speed, shockproof and drop resistance, low heat generation, zero noise and small size. The mapping relationship between Logical Block Address (LBA for short) and Physical Block Address (PBA for short) is recorded in SSD, and the data stored in SSD is meaningful only when the mapping relationship is known. . Unlike traditional mechanical hard disks, which usually use a fixed mapping relationship, the mapping relationship of SSDs has certain rules, but it is not fixed. Generally, SSD maintains the mapping relationship between LBA and PBA through a mapping table. When the mapping table is lost or damaged due to some abnormal co...

AI Technical Summary

Problems solved by technology

[0004] However, when the data management unit of SSD manages data in smaller units such as more than one page or more than one sector (sector), the existing method of writing data in NAND FLASH determines that within a certain period of time, SSD There may be multiple pages or sectors corresponding to the same LBA on the storage medium. In this way, it is impossible to distinguish which page or sector data corresponding to the LBA is valid during the data reconstruction process, so that the reconstruction of the entire disk data cannot be realized. structure

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