By the way, be sure to put an ACTIVITY FREEZE on the switch, then partition the system before attempting a hard drive copy.
Partition the ACTIVE plane first, then do the inactive. If you can't partition the Inactive plane then issue the command BUSY MATE on the inactive side and try to PARTITION again. If still no go then give the command FILE DISABLE RED to the inactive side and answer "yes" to the question that follows.
Remember to also set the active plane HD to read only (VOL SET SYSUSER R O) before issuing the VOL RESTORE SYSUSER FROM OTHER on the inactive plane.
Once you've done an HD copy then push the button to load the inactive plane from the newly copied drive.
While that's loading go back to the active plane and give the command VOL SET SYSUSER R W
Now go back to the inactive.. Once it comes up with a "desktop" screen go ahead and log in (default PW likely at this point) and issue the command JOIN. Wait for it to occur (it will ask for confirmation that both planes are at the same release.... they are because you just copied the drive so say yes and wait for the SYSTEM JOIN COMPLETED response.
Finally go back to the ACTIVE plane and issue the JOIN command here as well. Once again wait for it to happen.
Next the inactive plane will spontaneously reload. This is normal.
Remember to remove the Activity Freeze.