Working on a "learner" drive Maxtor with MX15 Firmware.
Just discovered that for my particular drive I had to power off the drive, disconnect from terminal and then reconnect terminal to allow the instructions for Partition regeneration:
F3 T>m0,2,2,,,,,22 to be entered.
Prior to the above terminal would just hang after the command was entered.
You all probably know this but I've now got a working drive from my stack of testers.

Just a little bit of info that might help someone.
Cheers
Logical.
(If it had been a customers, my success rate would now be 66.666%

)