Actually, I was trying to install Debian 7.0 wheezy. But I had a trouble with /boot partition even though it’s not a problem on upgrading. And the partitioner corupted the old partition table with making a GPT partition. Mistaking it for the trouble by a Debian installer, I tried to install Ubuntu 12.04 LTS Server Edition many times. After that, I succeeded to install it when I make the 711MB base partition as / volume and LVM Physical Volume with /usr, /tmp, /var, /home, and swap.