8.11. Introduction to LVM
LVM (Logical Volume Manager) is a powerful Linux feature that adds a layer of abstraction between the physical partitions on your system and the filesystems that they store. Partitions managed by LVM are called a physical volumes, which are combined together to form volume groups. From each volume group logical volumes can be created, on which filesystems are actually stored. The size of each volume group is the sum of the sizes of all its physical volumes. This space can be handed out to as many logical volumes as will fit into it, so that it could contain many small logical volumes or one huge one that spans multiple physical volumes (and thus partitions).
At first glance, LVM may not seem any more powerful than RAID, ...
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