./mfm_read --format WD_1006 --sectors 17,1 --heads 6 --cylinders 820 --header_crc 0xffff,0x1021,16,0 --data_crc  0xffffffff,0x140a0445,32,6 --sector_length 512 --retries 50,4 --drive 1 -e ams1100.ex -t ams1100.tr
Board revision B detected
Bad block set on cyl 622, head 1, sector 1                                     
ECC Corrections on cylinder 622 head 1: 9(5)
Found cyl 0 to 819, head 0 to 5, sector 1 to 17                                
Expected 83640 sectors got 83639 good sectors, 0 bad header, 0 bad data
1 sectors marked bad or spare
1 sectors corrected with ECC. Max bits in burst corrected 5
Track read time in ms min 24.602750 max 1418.947958 avg 40.663255