There is provided a disc array control method and apparatus for controlling access to a disc drive consisting of a plurality of second data obtained by dividing a first data and a plurality of discs for storing the error correction data for the second data. Particularly, the disc array control method and apparatus of the present invention determines the information consisting of disc storing a plurality of the second data and address on the disc, data size of a plurality of second data and disc storing the error correction data and address on the disc to make equal the time required for access to a plurality of second data and error correction data and executes the access to the disc drive on the basis of the determined information. Thereby, the time required for access to the error correction data and sub-blocks can be set to equal time and the real-time property can be assured while maintaining high reliability.