ARCHIMEDES ADFS DISC ERRORS FLOPPY 08 CRC error in data 10 sector not found 18 CRC error in sector header HARD DISC 06 unit selected signal has not been returned by drive 07 write fault signal from drive 08 drive not ready 09 seek complete has not been returned 10 data error has been detected by ECC (error correction code) 13 a fatal ECC error has occurred in DATA area 16 sector ID has not been found 17 an ID area that begins with an improper address mark has been detected 18 the address mark in DATA area has not been detected