I would like to gather a bit more data on this. Can you attach the output of "sudo fdisk -l /dev/sdb" (given sdb is the iPod)? In general, I see unsuccessful mounts of the first partition, which might not be the one containing the data (thus the question for the fdisk data). And you might verify directly whether "sudo mount /dev/sdb2 /mnt" works and yields the data under /mnt.
I would like to gather a bit more data on this. Can you attach the output of "sudo fdisk -l /dev/sdb" (given sdb is the iPod)? In general, I see unsuccessful mounts of the first partition, which might not be the one containing the data (thus the question for the fdisk data). And you might verify directly whether "sudo mount /dev/sdb2 /mnt" works and yields the data under /mnt.