This is my hell:
1º HD 140Gb SATA have a linux sistem 2º HD 140Gb SATA have a extended partition mounted in fstab:
/dev/sdb1 /media/backup ext3 defaults,errors=remount-ro 0 1
The first HD have only 1,2Mb Free and need to move from HD to HD2 data.. ok y execute has root this:
mv /var/www/WORKS /media/backup
This comand execute INSTANT (/var/www/WORKS have aprox 80Gb of data), and /var/www/WORKS DISAPPEAR, but in /media/backup not have nothing...
The case is in /dev/sda1 continue only free 1,2Mb... but directory /var/www/WORKS dosent exists.