I think that "disk2s1" is the partition's label. Usually the partition gets a mount point in the directory /media and that mount point is named after the device name. In the PCMan File Manager the partitions are often identified by their label. You might try
Code:
ls -l /dev/disk/by-label/disk2s1
to get the device name. Execution of the command
Code:
mount
delivers information about the partition's mount point if it's already mounted. Afterwards you might execute
Code:
ls -la "mount point"
Example: The partition has got the label "Cruzer1" and the device name is /dev/sda1. The mount command delivers the mount point /media/sda1. Thus I would execute
Code:
ls -la /media/sda1
in order to see the owner, group and permissions.

If the partition has not yet been mounted then the mount command won't show you a mount point, but
you might try
Code:
sudo mkdir /media/macdisk
sudo mount -o gid=1000,uid=1000 /dev/disk/by-label/disk2s1 /media/macdisk
ls -la /media/disk2s1
If this does not work then mount will give you an error message.