./mfm_read -a -t ev346.tr -e ev346.ex
Board revision B detected
Found drive at select 1
Drive RPM 3602.2
Matches count 34 for controller WD_1006
Header CRC: Polynomial 0x1021 length 16 initial value 0xffff
Sector length 512
Data CRC: Polynomial 0x140a0445 length 32 initial value 0xffffffff
Selected head 8 found 0, last good head found 5
Read errors trying to determine sector numbering, results may be in error
Number of heads 6 number of sectors 17 first sector 1
Interleave (not checked): 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
Drive supports buffered seeks (ST412)
No sectors readable from cylinder 820                                          
Disk has recalibrated to track 0
Stopping end of disk search due to recalibration
Number of cylinders 820, 42.8 MB

Command line to read disk:
--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 
Bad block set on cyl 622, head 1, sector 1                                     
Bad block set on cyl 622, head 1, sector 1
Bad block set on cyl 622, head 1, sector 1
Bad block set on cyl 622, head 1, sector 1
All sectors recovered after 3 retries cyl 622 head 1
ECC Corrections on cylinder 622 head 1: 9(6)
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 6
Track read time in ms min 30.307542 max 2282.577041 avg 41.702324