FC5: can't mount JFS LVG

[Ben Lancaster <benlanc ster me uk>]

Hey,

I installed FC5 last night using "linux jfs" at the boot prompt, set  
up my partitions but retained my old FC4 jfs LVG, and now the volume  
won't mount:

# mount -t jfs /dev/mapper/MediaGroup-Media /Video
mount: wrong fs type, bad option, bad superblock on /dev/mapper/ 
MediaGroup-Media,
       missing codepage or other error
       In some cases useful info is found in syslog - try
       dmesg | tail  or so

No oopsie in dmesg or messages, what gives? I didn't touch the  
original volume group when playing with the partitions either.

Its worth noting that when I specified a mount path in DiskDruid on  
install, the installation failed because the install was unable to  
mount the LVG due to an "invalid argument" after formatting the other  
partitions.

Thanks,

Ben