You are laying out storage for a general-purpose Linux server. Which TWO of the following are genuine reasons to use LVM for the data filesystems rather than plain partitions?
LPIC-1 Exam 101-500, objective 102. Linux installation and package management medium
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The options
Choose 2.
Correct A logical volume can be grown later by adding a new disk to the volume group, without moving the data
Correct. Extending the VG with vgextend and then the LV with lvextend is the main practical reason LVM exists; a plain partition can only grow into adjacent free space.
Not correct LVM removes the need for a filesystem on the volume
Wrong. A logical volume is just a block device. You still run mkfs on it and mount it exactly as you would a partition.
Not correct LVM guarantees redundancy, so a failed disk cannot lose data
Wrong. Plain LVM offers no redundancy by default — losing one PV can destroy any LV with extents on it. Redundancy comes from RAID (or from explicitly configured LVM RAID/mirror volumes).
Not correct LVM allows a system to boot without a boot loader
Wrong. A boot loader is still required. LVM does not participate in firmware handoff at all.
Correct LVM can take a point-in-time snapshot of a logical volume for a consistent backup
Correct. Snapshot logical volumes give you a frozen view of the data to back up while the original stays online.
Why
LVM buys flexibility, not safety: online resizing, moving data between physical volumes, and snapshots. It does not replace the filesystem layer and it does not provide redundancy on its own — for that you put LVM on top of RAID or use LVM's explicit mirror/RAID volume types.
Where this comes from
- Cited
- LPI exam objective 102.1
- What it says
- Awareness of basic features of LVM.
Practise this
Reading one question is not practice. The trainer will draw a set from objective 102 and space the ones you get wrong.