Power-down data protection method and device of storage system

Abstract

The invention discloses a power-down data protection method and device of a storage system. The method includes the steps of detecting whether power-down occurs in the storage system occurs in real time; if yes, controlling a power supply of the storage system to switch from a main supply to a standby supply; controlling effective data, located in a cache of the storage system, to be all stored to a nonvolatile memory medium. After the power-down of the storage system is detected, the standby supply is used to power the storage system, and the effective data in the cache of the storage system is controlled and all stored to the nonvolatile memory medium; thus, security and persistence of the effective data in the cache is guaranteed. The standby supply is a power type battery low in cost; the problem that the existing storage system power-down data protection mode has high software and hardware costs is effectively solved.

Description

technical field

[0001] The invention relates to the field of computer storage, in particular to a method and device for protecting data from power failure of a storage system. Background technique

[0002] With the advent of the era of big data, the data demand of enterprises is increasing, and the requirements for data security are getting higher and higher. Generally, the process of storing data in a storage system is as follows: the data is first written to the memory, becomes the system cache, and then written from the memory to the hard disk. Since the memory where the cache is located is a volatile storage medium, during the process of writing data to the hard disk through the memory, if the system suddenly loses power, all the data in the memory that has not been written to the hard disk will be lost. When an unexpected power failure occurs, the storage system must write the valid data in the memory to the hard disk for storage to ensure data security.

[0003] At p...

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