centos7 磁盘刷新容量

1、添加一块新的硬盘sdb，40G
	# lsblk
	# mkdir /test
	# mkfs.ext4 /dev/sdb 
	# blkid | grep sdb
	# echo `blkid | grep sdb` >> /etc/fstab 
	# vim /etc/fstab
		UUID=6f515da7-181d-4974-8134-86e43cfb40f6 /test ext4 defaults 0 0
	# mount -a
	# lsblk
	# df -hT
	# cp /etc/host* /test/
	# ls /test/
	# init 0
2、将sdb从40G扩到50G
	# lsblk
	# df -hT
	# parted /dev/sdb print free
	# resize2fs /dev/sdb
	# lsblk
	# df -hT
	# ls /test/
	# init 0

3、添加一个新的硬盘sdc，30G
	# lsblk
	# mkdir /data
	# fdisk /dev/sdc
	# lsblk
	# mkfs.xfs /dev/sdc1 
	# lsblk
	# blkid | grep sdc1
	# echo `blkid | grep sdc1` >> /etc/fstab 
	# vim /etc/fstab
		UUID=7b5d4f30-6940-48a2-b4db-e660a128b3a7 /data xfs defaults    0   0
	# mount -a
	# cp -r /etc/pa* /data/
	# ls /data/
	# lsblk
	# df -hT
	# init 0
4、将sdc从30G扩到45G
	# lsblk
	# df -hT
	# parted /dev/sdc print free
	# xfs_growfs /dev/sdc1
	# df -hT
	# umount /dev/sdc1
	# parted /dev/sdc1 print
	# parted /dev/sdc print free
	# parted /dev/sdc resizepart 1 100%
	# xfs_growfs /dev/sdc1
	# mount -a
	# df -hT
	# lsblk
	# ls /data/