| 摘要 |
PURPOSE:To execute the processing speed of a device as a whole at a high speed by replacing a lock to an alternate block in a corresponding buffer size with a defect when the defect is detected at the time of writing the data to a user area. CONSTITUTION:When an abnormality is detected in a writing processing, into an alternate header part 34 of a defective block to generate the abnormality, the block address of an alternate destination, namely, an address to designate a block SB for an alternate processing in a buffer size area, in which a self- block is included, is written. Continuously, the data written into the defective block are read again by a buffer memory 11, and the data are written into a block SB for alternate processing designated by the alternate header 34 of the defective block are written. When the writing of the data to the block SB is completed, the writing checking to confirm whether or not the processing is normally completed is executed, the writing processing to the block is completed and preparations of the next block writing are executed.
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