The Terminal is drag-and-drop aware; you could open a terminal window and drag the mounted drive in question to a terminal window where it's UNIX path will be displayed.
For a removable drive, a disk would have to be inserted for you to see the pathname.
By the way, this will work with any file as well. Drag it to the open terminal window and it's path is displayed.
You can also see the pathname displayed with Disk Utility when you select a disk. More information can be found with Disk Utility by selecting the disk and using the Info button.
System Folder Icons:
You may need to "bless" the OS9 System folder; it doesn't matter on OSX. You might want to go to Control Panel: Startup Disk and select the system folder you want to start from normally.
If Startup Disk finds all the System Folders (assuming your backup is mounted) then you should be able to start from them (it "should" only recognize valid System Folders).
If you need to be sure, you might try starting up with the Option key pressed to go into Open Firmware (there is a text and a graphical version, this keystroke gives you the graphical one).
After a fairly good wait with a watch icon, the pointer icon will appear and there should be buttons for every OS it thinks it can boot from. Select one and click the right arrow button to boot.
You could test any System Folder that way; just be sure to select the one you want normally with either Open Firmware or Startup Disk once you're done testing.
[ November 16, 2004, 07:58 PM: Message edited by: gordguide ]