ubuntu@ubuntu:~$ df -h | grep Alt_OS
/dev/sda4       3.8G  671M  3.0G  19% /media/Alt_OS
ubuntu@ubuntu:~$ df -h
Filesystem      Size  Used Avail Use% Mounted on
/cow           1009M   90M  919M   9% /
udev           1000M  4.0K 1000M   1% /dev
tmpfs           404M  776K  403M   1% /run
/dev/sr0        707M  707M     0 100% /cdrom
/dev/loop0      676M  676M     0 100% /rofs
tmpfs          1009M  8.0K 1009M   1% /tmp
none            5.0M  4.0K  5.0M   1% /run/lock
none           1009M   80K 1009M   1% /run/shm
/dev/sda2       4.0G  1.4G  2.4G  36% /media/rootfs
/dev/sda1       4.9G  615M  4.3G  13% /media/Nokia N9
/dev/sda3       2.0G  488M  1.4G  26% /media/6fe87ce4-77ce-4528-bc99-884fd8fd551c
/dev/sda4       3.8G  671M  3.0G  19% /media/Alt_OS
ubuntu@ubuntu:~$