See also Linux
Logical Volume Manager (LVM) is a device‑mapper framework for the Linux (and NetBSD) kernel that provides flexible logical volume management by creating an abstraction layer over physical storage. Developed originally in 1998 by Heinz Mauelshagen at Sistina Software, with design influence from HP‑UX’s volume manager, LVM enables administrators to group physical volumes (PVs) into volume groups (VGs) and carve out logical volumes (LVs) that can span multiple disks. Logical volumes can be resized, moved, or snapshotted while systems are running, and feature support for thin provisioning, caching, striping, mirroring, and RAID‑style layouts. LVM is widely integrated in modern Linux distributions and underpin root‑filesystem setups, delivering operational flexibility and dynamic storage management without service interruption.