| 摘要 |
<P>PROBLEM TO BE SOLVED: To inhibit write performance of a storage system from gradually deteriorating because the size of a spare area to be used for stored data update control gradually reduces in accordance with an increase in the number of defective blocks of a flash memory in the storage system using a flash memory as a storage medium. <P>SOLUTION: The storage system includes the flash memory; a cache memory; a controller for controlling the reading, writing and erasure of data of the flash memory and the reading and writing of data of the cache memory, and detecting the occurrence of a defective block in the flash memory; and a host computer for issuing a command for requesting data write processing. When a controller detects the occurrence of a the defective block in the flash memory, the controller transfers prescribed data stored in the flash memory to the cache memory, and inhibits data based on a command from being written in the flash memory even in the case of receiving the command for updating the transferred data from the host computer. <P>COPYRIGHT: (C)2008,JPO&INPIT |
