Data storage system and operation method thereof

Abstract

A data storage system includes a disk array including a plurality of disks storing original data and redundant data that may be used to recover the original data. The data storage system further includes an interface circuit configured to receive a read request for the original data; an input/output (I/O) control circuit configured to provide the disk array with a read request received via the interface circuit; and a redundant data management circuit configured to manage information of the original data and the redundant data. The redundant data management circuit causes parity data, duplicate data, or both to be stored as the redundant data according to a first attribute of the original data, and determines a number of duplicate data according to a second attribute of the original data.

Dependencies are inferred from the claim text.