Magnetic disk data backup system and method

Abstract

The invention provides a magnetic disk data backup system and a running method thereof. The system comprises a backup control device, a device for reading before writing, a backup reading device, a magnetic disk filter driving device, a page-change device, a backup snapshot table, a memory buffering queue and a hard disk buffering file. The system preferably gains the backup snapshot table which is used for recording whether the magnetic disk sector data requires backup or not; the magnetic disk sector data required for backup are sequentially read in the magnetic disk according to the gained backup snapshot table so as to carry out the backup, meanwhile, the operation of the magnetic disk started to be monitored; the write operation of the magnetic disk is monitored and intercepted; if the write operation signal is intercepted during the backup process, the data is read in the written magnetic disk and memorized to the memory buffering queue, and when the data of the memory buffering queue exceeds the pre-arranged length, the data is moved out to the hard disk buffering file, and a write operation allowance signal is sent so as to complete the operation of reading before writing. The system and the method of the invention can ensure the consistent time of the backup data, avoid the headlock under the situation that the upper-layer service is not interrupted, and has high service application independence.

Description

technical field [0001] The present invention relates to the technical field of information security, in particular to a disaster recovery data backup method, and more specifically, to a disk-level data backup system and method capable of ensuring the state consistency of backup points. Background technique [0002] With the continuous development of computer technology and the continuous improvement of informatization, people's dependence on information is getting higher and higher. The highly centralized storage of information in the IT environment greatly improves the automation of information and data management, improves operational efficiency, and reduces operating costs. But at the same time, the risk is also increasing, and data loss caused by disasters may cause huge losses. [0003] In order to avoid adverse effects caused by disasters, it is necessary to perform regular or real-time backup of data. With the continuous improvement of the degree of informatization ...

AI Technical Summary

Problems solved by technology

[0009] In the above two methods (1) and (2), it is required to effectively lock other applications during data backup, so these two methods cannot support the uninterrupted execution of business applications during backup

As the amount of data increases, the time required for data replication is getting longer and longer, and business data is in constant use and cannot be terminated

Therefore, these two methods cannot meet the disaster recovery requirements of current key information business systems

The above two methods (3) and (4) are proposed for data backup at the file system level, and are related to upper-layer business applications. They are not suitable for data backup at the block device level, and the application range is limited; in addition, using these two methods An additional storage device is also required to realize the simultaneous protection of data by the backup process and the application process; finally, the methods proposed by these two patents are only applicable to Dos, Novell NetWare, OS / 2 or Unix and Macintosh using 6800 and PowerPC series CPUs Realized on the computer, it is not suitable for the existing Windows series operating system

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