I have an external hard drive, formatted as ext2, which I can use fine on my laptop. When I plug it into my desktop however I can cd to the disk, I can 'ls' see the list of directories and files, but I cannot descend into directories or read the files.
The permissions are set to:
drwxr-xr-x 3 500 mysql 4096 Feb 9 17:31 usb0
When I plug it back into my laptop I can access it fine as before.
(I dont have root on the desktop so cannot chown)