Data storage system for highly frequent repetitive data writing

摘要

A data storage system has a data storage device comprising an electrically erasable programmable read-only memory which has an array of data storage areas for storing supplied data therein. Supplied data may be written successively in the data storage areas again and again until any one of the data storage areas becomes unusable. Supplied data may also be written repeatedly in each of the data storage areas until each data storage area becomes unusable, and the writing of supplied data may be stopped when all the data storage areas become unusable. Alternatively, supplied data may be written successively in the data storage areas except any one or more of the data storage areas which have become unusable, and the writing of supplied data may be stopped when all the data storage areas become unusable.