Filesystem      Size  Used Avail Use% Mounted on
udev            989M  4.0K  989M   1% /dev
tmpfs           201M  1.3M  199M   1% /run
/dev/sdb1       3.8G 1020M  2.8G  27% /cdrom
/dev/loop0      976M  976M     0 100% /rofs
/cow           1001M   69M  933M   7% /
none            4.0K     0  4.0K   0% /sys/fs/cgroup
tmpfs          1001M  1.1M 1000M   1% /tmp
none            5.0M     0  5.0M   0% /run/lock
none           1001M  208K 1001M   1% /run/shm
none            100M   80K  100M   1% /run/user
/dev/sda1       150G  136G   14G  91% /media/ubuntu/Preload