A semiconductor disk wherein a flash memory into which data is rewritten in block unit is employed as a storage medium, the semiconductor disk including a data memory in which file data are stored, a substitutive memory which substitutes for blocks of errors in the data memory, an error memory in which...http://www.google.fr/patents/US7002851?utm_source=gb-gplus-shareBrevet US7002851 - Storage device employing a flash memory
