Filesystem      Size  Used Avail Use% Mounted on
/cow            7.9G   97M  7.8G   2% /
udev            7.8G   12K  7.8G   1% /dev
tmpfs           1.6G  1.3M  1.6G   1% /run
/dev/sdb1       7.2G  964M  6.2G  14% /cdrom
/dev/loop0      923M  923M     0 100% /rofs
none            4.0K     0  4.0K   0% /sys/fs/cgroup
tmpfs           7.9G  1.1M  7.9G   1% /tmp
none            5.0M  4.0K  5.0M   1% /run/lock
none            7.9G   80K  7.9G   1% /run/shm
none            100M   84K  100M   1% /run/user