Create LV Snapshot with lvcreate

A logic volum snapshot could restore the filesystem on ur logical volum. Here's how to do:

# lvcreate --size 100M --snapshot --name snaptest /dev/test-vg/lvol0

This would create a snapshot snaptest of logic volum /dev/test-vg/lvol0,  snaptest can be mounted just like lvol0:

# mount /dev/test-vg/snaptest /mount-point

By the way, here're commands how to operate a test lv:

1. Make partitions with fdisk or on gpt disks with parted.

2. Commands:

pvcreate /dev/sda5

pvcreate /dev/sda6                                   # Create physical volums.

vgcreate test-vg /dev/sda5 /dev/sda6         # Create volum group

lvcreate -L 8G test-vg                                # Create logic volum

3. Other related commands:

pvdisplay vgdisplay lvdisplay

lvremove /dev/test-vg/snaptest                   # This need to use the absolute path.

... ...