ext3 has quite unexpected semantics or "ro" and defaults are
not what they are documented to be, due to mkfs override.
Signed-off-by: NPavel Machek <pavel@suse.cz>
Signed-off-by: N"Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>