Episode 15 — LVM part 1: PV, VG, LV concepts and why LVM exists
Logical Volume Manager (LVM) is a recurring Linux+ topic because it represents modern storage management: flexible allocation, online growth, and abstraction that makes systems easier to evolve safely. This episode defines the core objects—physical volumes (PVs) as prepared disks or partitions, volume groups (VGs) as pooled capacity, and logical volumes (LVs) as the consumable slices presented to filesystems or applications. You’ll learn why LVM exists: to avoid being trapped by fixed partitions when needs change, and to enable controlled resizing and migration workflows without redesigning a system from scratch. On the exam, the skill is recognizing LVM in a scenario and understanding which layer you are operating on when you add capacity or adjust sizes.
we connect the concepts to admin reasoning and common operational patterns. You’ll practice reading storage layouts and identifying which commands or actions correspond to PV creation, VG extension, or LV provisioning, so you don’t confuse “pool expansion” with “filesystem growth.” We also address how LVM interacts with mounts and boot behavior, because LVs must be discovered and activated early enough for the system to mount critical filesystems. Finally, we emphasize safe planning habits: tracking free extents in a VG, aligning naming with purpose, and validating changes in the correct order so you can recover if a step fails. This builds a mental model that keeps LVM approachable rather than intimidating in PBQs and real maintenance windows. Produced by BareMetalCyber.com, where you’ll find more cyber audio courses, books, and information to strengthen your educational path. Also, if you want to stay up to date with the latest news, visit DailyCyber.News for a newsletter you can use, and a daily podcast you can commute with.
