/dev/sda1 5.5G 428M 4.9G 9% /target
/dev/sda5 276M 34M 229M 13% /target/boot
/dev/sda10 153G 204M 145G 1% /target/home
/dev/sda8 184M 5.6M 169M 4% /target/tmp
/dev/sda7 56G 2.7G 50G 6% /target/usr
/dev/sda9 1.1G 576M 404M 59% /target/var
If you are doing partitioning, make sure your /var has more than 576M of space, this was the space used during Mint 12 installation, also your /usr must be more than 2.7G. If your / is less than 5.8G Mint installation will complain and will not proceed.