An administrator is troubleshooting a server that fails to boot. The root filesystem is on an LVM logical volume. During boot, the system drops to an emergency shell with the error 'Volume group vgroot not found'. The administrator runs `pvscan` and sees the PVs but they are marked as 'unknown device'. What is the most likely cause and the correct first step to recover?

The LVM metadata is corrupted; run `vgcfgrestore vgroot` to restore from the backup in /etc/lvm/backup/.

The PVs have been removed from the VG; run `vgextend vgroot` to re-add them.

The device nodes are missing; run `vgscan` and then `vgchange -ay` to activate the VG.

The PVs are not being seen because of a missing device filter in /etc/lvm/lvm.conf; check the `filter` setting and ensure the disks are not excluded.

After a system crash, an administrator notices that the volume group vgdata is no longer visible in `vgs`. The physical volumes are still present on the disks. The administrator has a backup of the LVM metadata in /etc/lvm/backup/vgdata. What is the correct procedure to restore the volume group?

Run `vgimportclone` on the physical volumes to recover the VG.

Run `pvcreate` on each disk and then `vgcreate vgdata` to recreate the volume group.

Run `vgcfgrestore vgdata` to restore the metadata from the backup file.

Run `vgscan` and then `vgchange -ay` to activate the volume group.

What does the -L option in the lvcreate command specify?

The number of physical extents to allocate

The type of logical volume (e.g., striped, mirrored)

An administrator needs to remove a logical volume /dev/vgdata/lvold that is no longer needed. The LV is not mounted and contains no important data. What is the correct command to remove it?

`lvremove -f /dev/vgdata/lvold`

LPI LPIC-2:Linux Engineer (201-450)

Domain 5Objective 3

204.3 Logical Volume Manager (weight: 3) LPIC-2 Practice Questions (Page 1)

Part of the Topic 204: Advanced Storage Device Administration domain, which makes up ~10% of our current practice bank. Linux Professional Institute does not publish an official question count, but from its 90-minute exam (~35–60 total, ~4–6 in this domain), expect 1–2 from this objective — we provide 34 practice questions to prepare you well beyond it. (estimate)

34questions here

7free pages

12concepts

12 Concepts in This Objective

LVM architecture
Creating physical volumes
Creating volume groups
Creating logical volumes
Managing logical volumes
Removing LVM components
Displaying LVM information
LVM snapshots
LVM thin provisioning
LVM mirroring and striping
LVM metadata and backup
LVM troubleshooting

Questions 1–5

1expert · hard
An administrator is troubleshooting a server that fails to boot. The root filesystem is on an LVM logical volume. During boot, the system drops to an emergency shell with the error 'Volume group vgroot not found'. The administrator runs `pvscan` and sees the PVs but they are marked as 'unknown device'. What is the most likely cause and the correct first step to recover?
Select an answer first
2foundation · easy
Which command restores LVM metadata from a backup file?
Select an answer first
3application · medium
After a system crash, an administrator notices that the volume group vgdata is no longer visible in `vgs`. The physical volumes are still present on the disks. The administrator has a backup of the LVM metadata in /etc/lvm/backup/vgdata. What is the correct procedure to restore the volume group?
Select an answer first
4foundation · easy
What does the -L option in the lvcreate command specify?
Select an answer first
5application · easy
An administrator needs to remove a logical volume /dev/vgdata/lvold that is no longer needed. The LV is not mounted and contains no important data. What is the correct command to remove it?
Select an answer first

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204.3 Logical Volume Manager (weight: 3) LPIC-2 Practice Questions (Page 1)

Questions 1–5

Which command restores LVM metadata from a backup file?

After a system crash, an administrator notices that the volume group vgdata is no longer visible in `vgs`. The physical volumes are still present on the disks. The administrator has a backup of the LVM metadata in /etc/lvm/backup/vgdata. What is the correct procedure to restore the volume group?

What does the -L option in the lvcreate command specify?

An administrator needs to remove a logical volume /dev/vgdata/lvold that is no longer needed. The LV is not mounted and contains no important data. What is the correct command to remove it?

Keep studying — Topic 204: Advanced Storage Device Administration