Data storage method, device, storage medium, and system

An electronic device, comprising:

• a memory, a processor, and a communication interface, wherein the memory stores an executable code which, when executed by the processor, causes the processor to:
• determine, in response to a data write task, a target magnetic tape group from a plurality of magnetic tape groups, wherein a quantity of magnetic tapes comprised in the target magnetic tape group is a first quantity that is set based on erasure coding configuration information;
• obtain a group of data blocks corresponding to the data write task and generate a group of parity blocks based on the group of data blocks, wherein the group of data blocks comprises a second quantity of data blocks, the group of parity blocks comprises a third quantity of parity blocks, and the first quantity is a sum of the second quantity and the third quantity;
• determine, from the target magnetic tape group, target magnetic tapes and first physical storage spaces in the target magnetic tapes corresponding to the group of data blocks and target magnetic tapes and first physical storage spaces in the target magnetic tapes corresponding to the group of parity blocks, wherein each data block in the group of data blocks and each parity block in the group of parity blocks respectively correspond to different target magnetic tapes, and an offset of the first physical storage spaces corresponding to the group of data blocks is the same as an offset of the first physical storage spaces corresponding to the group of parity blocks;
• store the group of data blocks to the first physical storage spaces in the target magnetic tapes corresponding to the group of data blocks and store the group of parity blocks to the first physical storage spaces in the target magnetic tapes corresponding to the group of parity blocks.

A data storage system, comprising:

• a management server, a plurality of magnetic tapes, and a plurality of magnetic tape drives;
• wherein the management server is configured to:
• determine, in response to a data write task, a target magnetic tape group from a plurality of magnetic tape groups, wherein a quantity of magnetic tapes comprised in the target magnetic tape group is a first quantity that is set based on erasure coding configuration information;
• obtain a group of data blocks corresponding to the data write task and generate a group of parity blocks based on the group of data blocks, wherein the group of data blocks comprises a second quantity of data blocks, the group of parity blocks comprises a third quantity of parity blocks, and the first quantity is a sum of the second quantity and the third quantity;
• determine, from the target magnetic tape group, target magnetic tapes and first physical storage spaces in the target magnetic tapes corresponding to the group of data blocks and target magnetic tapes and first physical storage spaces in the target magnetic tapes corresponding to the group of parity blocks, wherein each data block in the group of data blocks and each parity block in the group of parity blocks respectively correspond to different target magnetic tapes, and an offset of the first physical storage spaces corresponding to the group of data blocks is the same as an offset of the first physical storage spaces corresponding to the group of parity blocks;
• store the group of data blocks to the first physical storage spaces in the target magnetic tapes corresponding to the group of data blocks and store the group of parity blocks to the first physical storage spaces in the target magnetic tapes corresponding to the group of parity blocks.