LFCS Certification Storage Management with LVM 4

Question 1

Which command renames a volume group from 'vg_old' to 'vg_new'?

Accepted Answer

vgrename vg_old vg_new

Answer

vgrename is the dedicated command for renaming volume groups and updates the UUID reference in metadata.

Question 2

After detaching a disk with LVM data to attach to another system, which sequence correctly imports the VG?

Accepted Answer

pvscan → vgimport → vgchange -a y

Answer

pvscan finds the PV, vgimport makes the exported VG available on the new host, and vgchange -a y activates the LVs.

Question 3

What is the default physical extent size when creating a new volume group with 'vgcreate'?

Accepted Answer

4 MB

Answer

LVM defaults to a physical extent size of 4 MiB unless overridden with the -s option during vgcreate.

Question 4

Which file must be updated so that LVM devices are scanned at boot on a system using initramfs?

Accepted Answer

/etc/lvm/lvm.conf

Answer

/etc/lvm/lvm.conf controls LVM behaviour including device filters and scanning; initramfs copies it for early boot activation.

Question 5

How do you convert an existing linear logical volume to a two-way RAID1 mirror using LVM?

Accepted Answer

lvconvert --mirrors 1 /dev/vg0/lv_data

Answer

lvconvert --mirrors 1 converts an existing LV to a mirrored type with one additional copy (total 2 legs).

LFCS Certification Practice Test