Magnetic disk array system and power-down data protection system and method for the same

Abstract

The embodiment of the invention discloses a system for protecting the power-fail data of a disk array. The system comprises a power input module, a battery electricity preparation module, a control module and a storing module. The power input module is used for converting the input alternating current to the DC current when the power supply is normal, supplying power to the control module and the storing module, and charging the battery electricity preparation module; the battery-prepared module is used for directly supplying the power to preset disk arrays in the control unit and the storing module when the input of the power supply is abnormal; the control module is used for writing the data cached above onto the storing module; the storing module is used for finally storing data. The embodiment of the invention further discloses a method for protecting the power-fail data and a disk array system. With the adoption of the scheme, the power can be directly supplied to the preset disk arrays arranged in the control unit and the storing module through the battery electricity preparation module, so that the voltage conversion is unnecessary, and the electricity preparation volume and the data lost are reduced.

Description

technical field [0001] The invention relates to the field of data storage, in particular to a disk array system and a power-down data protection system and method for the disk array. Background technique [0002] With the development of information technology, the amount of data is increasing, which requires large-capacity storage devices. A disk array is a storage device that places several disks together, which can improve the storage of massive data. Disk array devices generally have a large-capacity cache (that is, high-speed cache memory). The host data is cached in the cache first, and the system is abnormally powered off. If the data in the cache is not written to the disk in time, it will be lost. Therefore, how to effectively ensure that the data in the disk array Cache will not be lost in the event of an abnormal input power failure, and what method to adopt for powering the disk array is particularly important. [0003] In order to ensure that the data in the di...

AI Technical Summary

Problems solved by technology

[0004] However, the above two methods have the following defects: in the first method, the buffer memory unit (generally cache) is powered in the disk array, and the power supply time is limited due to the limitation of the battery capacity. The buffer storage unit (usually cache) will lose data due to battery energy depletion

Images