RHEL v7: create xfs

Create a xfs file system on a new logical volume of 100MB called lv_xfs.
Mount it permanently with uuid under /xfs.

 # lvcreate –size 100M –name lv_xfs /dev/vg
# mkfs.xfs /dev/vg/lv_xfs
# mkdir /xfs
# blkid | grep lv_xfs >> /etc/fstab
# vi /etc/fstab
UUID=… /xfs xfs defaults 1 2
# mount -a