The invention concerns a data storage method enabling error detection and
correction in an organized storage for reading and writing words of a
first number (m) of bits and optionally for modifying only part of such a
word, comprising the following steps which consist in: associating an
error detection and correction code with a group of a second number
(k.gtoreq.1) of words; and at each partial writing in the group of words,
calculating a new code of the modified group of words; performing a
verification operation and, if an error occurs, carrying out an error
correction of the modified word and/or of the new code.