METHOD FOR DATA STORAGE IN REDUNDANT ARRAY OF INDEPENDENT DISKS WITH INCREASED FAULT TOLERANCE Russian patent published in 2021 - IPC G06F11/10 G06F11/16 

FIELD: data storage systems.

SUBSTANCE: invention relates to data storage systems. The method comprises the following steps: writing data blocks to the cache of the controller of the first disk group, writing the data blocks as part of a strip to the disks of the first disk group, grouping the written data blocks into local groups, calculating the checksums of local groups, writing the checksums of local groups to the cache of the controller of the second group disks, writing checksums to disks of the second group of disks, and in case of failure of one or more disks of the first group, the lost data blocks are restored from the checksums written on the disks of the second group of disks, and recording the recovered data blocks to the controller cache of the first disk group, and in case of failure of one or more disks of the second disk group, the lost checksums are restored from the remaining checksums written on the disks of the second disk group, and the recovered checksums are written to the controller cache of the second disk groups.

EFFECT: invention increases the fault tolerance of the storage system while minimizing the impact of the processes that ensure the fault tolerance of the system on the performance of the processes of reading and writing data by the user.

1 cl, 18 dwg