Storage system

Abstract

The invention is a storage system, comprising a UPS, a storage device and an external power supply; wherein, the UPS is electrically connected with the storage device and the external power supply; the external power supply is used for charging the UPS and supplying power for the storage device; the UPS supplies power for the storage device when the external power supply does not supply power for the storage device any more; the storage device is used for storing data, is provided with two data write modes, namely a write-back mode and a write-through mode when writing data and contains a monitoring module for monitoring the power supply state of the UPS; the monitoring module sends information corresponding to the UPS power supply state to the storage device after receiving the UPS power supply information; and the storage device selects one mode as the data write mode when receiving the information from the monitoring module. The invention can improve safety and efficiency of data writing.

Description

technical field [0001] The invention relates to a storage system, in particular to a storage system related to the safety and efficiency of data writing. Background technique [0002] General storage devices including CPU, MEMORY, HARD DISK, etc. have two data writing modes, one is WRITEBACK, that is, write back, that is, when writing data, it is written to the DISK CACHE storage device, and then the write action returns, when writing to DISKCACHE When the data in DISK CACHE reaches a certain amount or the data in DISK CACHE is TIME OUT, the data in DISK CACHE is written to the storage device such as HARD DISK at one time; the other is WRITE THROUGH, that is, write through, that is, when writing data Write to DISK CACHE, and at the same time, the write action returns after actually writing to the storage device. Among the above two data writing modes, the data writing efficiency of the WRITE BACK mode is higher, but if the system is abnormally powered off, the data in the D...

AI Technical Summary

Problems solved by technology

Among the above two data writing modes, the data writing efficiency of the WRITE BACK mode is higher, but if the system is abnormally powered off, the data in the DISK CACHE will be lost. At this time, because the data has not been written In the storage device, it will be difficult to retrieve or be lost forever if lost; and the WRITE THROUGH data writing mode can ensure that the data in DISK CACHE is synchronized to the storage device. Therefore, when the system is abnormally powered off, The data in the storage device will not be lost due to the loss of data in the DISK CACHE, but the efficiency of data writing is very low if the data is written in the WRITE THROUGH mode

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