Gregory Colpart's blog

% mv /usb/foo /tmp/
mv: cannot remove `/usb/foo': Read-only file system

% mount | grep sdb
/dev/sdb1 on /usb type ext3 (rw)

% cat /proc/mounts | grep sdb
/dev/sdb1 /usb ext3 ro,data=ordered 0 0

“cat /proc/mounts” vainqueur.