pvscan
vgscan
lvscan
lvscan
inactive '/dev/centos/swap' [2.00 GiB] inherit
inactive '/dev/centos/home' [17.80 GiB] inherit
inactive '/dev/centos/root' [36.46 GiB] inherit
vgchange -a y centos
https://www.tldp.org/HOWTO/LVM-HOWTO/activatevgs.html
11.3. Activating a volume group
vgchange -an centos
apt
ls /dev/centos
mount /dev/centos/root testmount
mount /dev/centos/home testmount
http://marcustsai.blogspot.com/2010/11/lvm.html
LVM實作
https://wiki.ubuntu.com/Lvm
https://help.ubuntu.com/lts/serverguide/advanced-installation.html.en
