METHOD FOR DETECTING AND RECOVERING ERROR WHEN DATA IS WRITTEN IN COMPUTER SYSTEM AND FLOPPY (REGISTERED TRADEMARK) DISK DEVICE

摘要

PROBLEM TO BE SOLVED: To detect a writing error due to DMA underrun as suppressing increase of loads of a system and to guarantee data of following sectors. SOLUTION: When a writing request to a floppy disk device is generated, writing is executed after the data of a sector to follow the last sector of writing to be a writing object is read (S2, S3) and after that, a writing result of the requested data is verified by reading the written data and comparing it with original data (S5, S6). In addition, the next sector to the last sector of writing is verified whether it is destroyed or not by reading the data of the sector and comparing it with the original data of the sector (S8), when the sector is destroyed, it is restored by the original data (S9), when the sector is restored here and the next sector further exists, verification in S8 is further performed for the sector (S10, S11).