Method, equipment and memory system for guaranteeing data security

Abstract

The embodiment of the invention discloses a method, equipment and storage system that can guarantee the data security. The method includes the steps of: acquiring the current storage capacity of a power supply unit; and controlling the cache data quantity of a cache memory device according to the current storage capacity of the power supply unit. The equipment includes: a control device and the cache memory device, wherein the control device is utilized to acquire the current storage capacity of the power supply unit which supplies electricity to the equipment, and control the cache data quantity of the cache memory device according to the current storage capacity of the power supply unit; and the cache memory device is utilized to cache data according to the control of the control device. The embodiment of the invention can avoid the influence on the data security caused by the aged power supply unit under abnormal power failure.

Description

technical field [0001] The invention relates to the technical field of data storage, in particular to a method, device and storage system for ensuring data security. Background technique [0002] As a storage device, a solid state disk (SSD, Solid State Disk) is composed of a control unit and a storage unit. SSD does not have a mechanical rotating device, and has the characteristics of high read and write performance, strong shock resistance, and low power consumption. It is widely used in automotive, video surveillance, electric power, aviation and other technical fields. [0003] Taking the control unit as a flash memory (Flash) controller and the storage unit as a non-volatile Flash chip or Flash chip array as an example, SSD data writing is generally divided into two methods, namely: direct writing and cache writing Way. The direct write method is generally based on an SSD without a cache device (Cache). Data enters through the interface of the SSD, is scheduled, allo...

AI Technical Summary

Problems solved by technology

[0006] During the research process, the inventor found that the above-mentioned existing SSD has both faster speed and higher security when writing data into SSD. The implementation scheme has at least the following disadvantages: In the case of abnormal power failure, the impact of the aging of the power supply device on data security cannot be avoided

Specifically, after the power supply device has been used for a period of time, the power storage capacity is reduced, and in the event of an abnormal power failure, it is impossible to ensure that the data cached in the cache device is completely written into the Flash chip or the corresponding Flash chip in the Flash chip array, and data security is at risk.

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