LVM
Logical Volume Management LVM (Logical Volume Management) is a powerful option to manage hard disks available in many Linux distributions.
There are some terms that you’ll need to know about LVM. The most important things you must understand are:
Physical volumes: These are your physical disks, RAID arrays, or disk partitions, such as /dev/hda or /dev/hdb1. Volume groups: Groups physical volumes into storage groups, and is the storage used to create logical volumes.
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