LVM

[root@localhost ~]# ls -l /dev/sd*

[root@localhost ~]# pvcreate /dev/sdb

[root@localhost ~]# pvcreate /dev/sdc

[root@localhost ~]# vgcreate xiaoguo /dev/sdb /dev/sdc

[root@localhost ~]# lvcreate -n haha -l 100 xiaoguo

[root@localhost ~]# mkfs.ext4 /dev/xiaoguo/haha

[root@localhost ~]# mkdir /haha

[root@localhost ~]# mount /dev/xiaoguo/haha /haha/

[root@localhost ~]# vim /etc/fstab

[root@localhost ~]# df -h

扩容：

[root@localhost ~]# umount /haha

[root@localhost ~]# lvextend -L 800M /dev/xiaoguo/haha

[root@localhost ~]# e2fsck -f /dev/xiaoguo/haha

[root@localhost ~]# resize2fs /dev/xiaoguo/haha

[root@localhost ~]# mount -a

[root@localhost ~]# df –h

缩容：

[root@localhost ~]# umount /haha

[root@localhost ~]# e2fsck -f /dev/xiaoguo/haha

[root@localhost ~]# resize2fs /dev/xiaoguo/haha 300M

[root@localhost ~]# lvreduce -L 300M /dev/xiaoguo/haha

[root@localhost ~]# mount -a

[root@localhost ~]# df –h

快照：

[root@localhost ~]# cd /haha/

[root@localhost haha]# cp -rf /etc/* ./

[root@localhost haha]# ls

[root@localhost haha]# lvcreate -L 300M -s -n SNAP /dev/xiaoguo/haha

[root@localhost haha]# lvdisplay

[root@localhost haha]# ls

[root@localhost haha]# rm -rf *

[root@localhost haha]# ls

[root@localhost haha]# cd ~

[root@localhost ~]# umount /haha

[root@localhost ~]# lvconvert --merge /dev/xiaoguo/SNAP

[root@localhost ~]# mount -a

[root@localhost ~]# ls

删除：

[root@localhost ~]# umount /haha

[root@localhost ~]# vim /etc/fstab

[root@localhost ~]# lvremove /dev/xiaoguo/haha

[root@localhost ~]# vgremove xiaoguo

[root@localhost ~]# pvremove /dev/sdb

[root@localhost ~]# pvremove /dev/sdc

LVM

原文：https://www.cnblogs.com/dinghailong128/p/12178405.html