I just formatted my PC and decided to install a dual boot of Windows 7 and Ubuntu 14.04LTS following this answer I set the partitions.
But somehow in the last step I couldn't format the partition using gparted.
I want to have 2 system partitions 50GB each, 1 for windows and 1 for ubuntu, and the rest will be shared.
I mounted them this way.
The partition sda5 should be ntfs for using with windows too, but it's locked and I can't unmount. I get
Could not unmount /dev/sda5 umount: /home: device is busy. (In some cases useful info about processes that use the device is found by lsof(8) or fuser(1))