RAID6 data recovery method, device and system based on data matrix

The invention provides an RAID6 data recovery method, device and system based on a data matrix and a storable medium, and the method comprises the steps: randomly selecting one physical disk from RAID6 composed of N physical disks, searching a file, recording the initial position of a keyword, recording the recording number of the file, transversely comparing whether the keyword exists in the corresponding positions of other physical disks or not, and if yes, recovering the data matrix. If the file record number exists, recording the file record number, when the number of the file record number is larger than or equal to N-2, subtracting every two adjacent file records after sorting, selecting a difference value with the highest occurrence frequency, multiplying the difference value by the size of one file record to obtain the strip size of the RAID6, and distributing a logic number and a verification block of a strip block according to the file record number, randomly selecting one physical disk to longitudi