Loss equalizing method, apparatus and system for hard disc

Abstract

The embodiment of the invention discloses a method for averaging the abrasion of a hard disk, a device of the method and a system thereof; wherein, the method for averaging the abrasion of the hard disk comprises: the threshold values of service life and write operation times of a memory system are obtained; the service life value of the hard disk where a data unit is arranged and the write operation times of the data unit are obtained; the data unit is moved onto the hard disk which is related to a first comparative result according to the first comparative result between the service life value and the threshold value of service life of the hard disk where the data unit is arranged and a second comparative result between the write operation times and the threshold value of write operation times of the data unit. The technical proposal of the embodiment of the invention realizes average abrasion among a plurality of solid state hard disks and avoids the situation that one hard disk is broken down earlier than other hard disks caused by excessive erasing aiming at the storage system.

Description

technical field [0001] The invention relates to the technical field of data storage, in particular to a wear leveling method of a hard disk, a storage system control device and a storage system. Background technique [0002] A solid state disk (Solid State Disk, SSD) is a hard disk composed of a control unit and a solid state storage unit. Its interface specifications, functions, and usage methods are the same as ordinary hard disks. Since the solid-state hard disk does not have the mechanical rotation device of the ordinary hard disk, it has the characteristics of fast reading and writing speed, low working noise, good shock resistance, and wide operating temperature range. [0003] At present, most of the storage units of solid-state hard drives use non-volatile flash memory (flash) chips, which have the advantages of not being controlled by the power supply for data protection, easy to move, and can be adapted to various environments. The disadvantage is that there is a p...

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Problems solved by technology

[0005] In the process of realizing the present invention, the inventor found that there are at least the following problems in the prior art: due to the wide application of multi-hard disk storage technology, for a certain system, there are often multiple hard disks working at the same time, and the data stored in these hard disks are still There may be correlation, that is, when a hard disk fails, the related data stored in other hard disks will also fail

The existing consumption leveling technology, whose operating unit is a flash memory block, can only perform wear leveling of storage media within the scope of a single solid state hard disk, which may lead to the fact that in a system that uses multiple solid state hard disks, a certain hard disk will The write frequency is high and the failure occurs before other hard disks, which may also lead to the failure of related data stored in other hard disks

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