Frank Hintsch (f.hintsch@mac.com) has a convergent technologies system sold as 
OEM Motorola 6300 Workstation and put some questions on the german classic computer
forum. 
He is the first owner of the system and lost his login password so we had to
crack the login pw. 

We helped him with a MFM Emulator/reader so he could find the PW hash in the 
saved emulator file  and one from the CCForum was the fastetst of all.
So Frank got his PW and successfully logged in.

The password was found and Frank got a correct login. ## Password = 7236039 ##

Here is the threat in German language of course but with some interesting 
pictures to look.

http://forum.classic-computing.de/index.php?page=Thread&threadID=12141 

Other informations (info from vfced) are at www.bitsavers.org/pdf/convergent/68K


Analysing the harddisk with mfm_emulator gave following log:

root@beaglebone:~/mfm# ./setup_mfm_read 
Rev B Board
root@beaglebone:~/mfm# ./mfm_read -a -e s6300_ext -m s6300_emu -t s6300_tra
Board revision B detected
Found drive at select 1
Drive RPM 3580.4
Matches count 34 for controller WD_1006
Header CRC: Polynomial 0x1021 length 16 initial value 0xffff
Sector length 512
Data CRC: Polynomial 0x1021 length 16 initial value 0xffff
Number of heads 4 number of sectors 17 first sector 0
Interleave (not checked): 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Drive supports buffered seeks (ST412)
No sectors readable from cylinder 640                                          
Stopping end of disk search due to two unreadable tracks in a row
Number of cylinders 640, 22.3 MB

Command line to read disk:
--sectors 17,0 --heads 4 --cylinders 640 --header_crc 0xffff,0x1021,16,0 --data_crc  0xffff,0x1021,16,0 --format WD_1006 --sector_length 512 --retries 50 --drive 1 
Found cyl 0 to 639, head 0 to 3, sector 0 to 16                                
Expected 43520 sectors got 43520 good sectors, 0 bad header, 0 bad data
0 sectors corrected with ECC. Max bits in burst corrected 0
Track read time in ms min 29.487041 max 1450.497916 avg 43.445303
