1.Install XenServer 6.0.2 on /dev/sda and do NOT configure any local storage
2./dev/sda should containt three partitions, please verify with the following command:
sgdisk -p /dev/sda
3.The first partition is used for XenServer installation, the second one is used for backups during XenServer upgrades. If third partition is not created? create it with following command:
sgdisk --new=3:16779264:3907029134 /dev/sda &&
sgdisk --typecode=3:fd00