after create a new partition using ‘fdisk /dev/sda‘, you must format it with a file system and mount it, or it can‘t use.
1. fdisk /dev/sda
2. partprobe /dev/sda
3. df -h
4. mkfs -t xfs /dev/sda3
5. mount /dev/sda3 /tmp
6. findmnt
7. umount /dev/sda3 /tmp
原文：http://www.cnblogs.com/bajunma123/p/5636906.html