Choosing the LVM layer for a filesystem | LinuC Level 1 101 Exam original practice question

1.05.2Basic

Allocate 20 GiB from a VG, create ext4, and mount it at /var/log.

Which LVM layer should receive the filesystem?

Hint 1: Focus on the requirement

Choose the LVM object exposed as a block device on which a filesystem can be created.

Hint 2: Key terms

Review the short partitioning and LVM definitions before comparing the choices.

LV: A logical block device allocated from a volume group.
mkfs: A family of commands that creates a filesystem on a block device.
device-mapper: The kernel framework used to construct mapped logical devices.
VG: The pool that supplies capacity to logical volumes.

Detailed explanation

Incorrect物理エクステント（PE）

Incorrect. A physical extent is an internal allocation unit, not normally a direct mkfs target.

Incorrectボリュームグループ（VG）

Incorrect. The VG is a capacity pool rather than the specific block device for one filesystem.

Incorrect物理ボリューム（PV）

Incorrect. A PV is the lower layer supplying the pool.

Correct論理ボリューム（LV）

Correct. The LV is the block device on which ext4 is created.

An example you can run in a temporary verification environment.

lvs --help 2>&1 | sed -n '1,12p'

logical volume情報を表示するlvsの使用法

Environment: LVM2 / ヘルプ表示のみ
Use read-only inspection or a disposable disk when learning storage commands.
Partition and LVM writes can destroy data; verify the target before running them.

Foundation review

The LV is normally the filesystem boundary; the VG and PE/LE units remain LVM management layers.

Inspect the device path and size before formatting an LV.

Question IDKL-101-571

EnvironmentLVM2 / ヘルプ表示のみ

Last technical review2026-08-13

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