LinuC Level 1 101 Exam · Objective 1.05.1

Choosing the LVM layer for a filesystem

1.05.1Basic

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

Which LVM layer should receive the filesystem?

Detailed explanation

Incorrectlsusb

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

Correctlspci

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

Incorrectlsmod

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

Incorrectrmmod

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

Try it yourself

An example you can run in a temporary verification environment.

lspci -nn | sed -n '1,6p'

Expected result

PCIアドレス、デバイスクラス、名称、[vendor:device] ID

Key points

LV is allocated from a VG
It is a block device
It can receive a filesystem

Notes

Environment: pciutils lspci / 読み取り操作
Prefer read-only inspection or a disposable system when testing hardware commands.
Device visibility and module behavior depend on the host and virtualization environment.

Foundation review

Place the operation

Bus-specific tools expose different hardware inventories.

Check the side effect

Use -nn when numeric IDs are needed for driver investigation.

Question IDKL-101-551

Environmentpciutils lspci / 読み取り操作

Last technical review2026-08-13

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