US Patent 11275531 Storage system, management apparatus and storage medium

A management apparatus, includes a memory; and a processor coupled to the memory and configured to: manage a library device including one or more drive devices, an accommodation shelf in which accommodation cells that accommodate a plurality of tape media are arranged, and a robot that performs conveyance operation to convey the tape media between the accommodation cells and the drive devices, receive an instruction to write a plurality of pieces of writing data, set, as an erasure coding set, two or more pieces of writing data having a data size less than a threshold among the plurality of pieces of writing data, and allocate the two or more pieces of writing data to one of the plurality of tape media.