As I mentioned, the Ubuntu box had been running all day without a reboot. The Firewire drive has been turned off most of the day. (I used it earlier, umounted the partitions, and turned it off. When I turned it on tonight, it would not mount.)
I just rebooted the Ubuntu box (without powering it down) and when I turned on the Firewire drive all the partitions mounted correctly.
As I mentioned, the Ubuntu box had been running all day without a reboot. The Firewire drive has been turned off most of the day. (I used it earlier, umounted the partitions, and turned it off. When I turned it on tonight, it would not mount.)
I just rebooted the Ubuntu box (without powering it down) and when I turned on the Firewire drive all the partitions mounted correctly.