https://nyanshell.com/lvm/2017/09/24/lvm-snapshot.html
LVM Create Snapshot | Nyanshell Write Works
Sep 24, 2017 - $ lvcreate --size 900G --snapshot --name mdb-snap01 /dev/mapper/vg-data $ mount /dev/vg/mdb-snap01 /mnt/backup/ -onouuid,ro # backup things $ umount...
lvm create snapshotnyanshell write works