Centos 6.5 root expansion

1. Add a hard disk

2. fdisk -l (view the location of the newly added hard disk)

3. fdisk /dev/sdb (create partition)

4. mkfs -t ext4 -c /dev/sdb1 (format partition)

5. pvcreate /dev/sdb1 (create pv)

6. vgextend /dev/VolGroup /dev/sdb1 (extended vg)

7. lvextend -L +4096M /dev/VolGroup/lv_root (extend the lv where the root partition is located)

8. resize2fs /dev/VolGroup/lv_root (refresh root partition)