Linux+ Linux+ Logical Volume Management (LVM) 3

Question 1

Which command is used to add a physical volume to an existing volume group named vg0?

Accepted Answer

vgextend vg0 /dev/sdd

Answer

vgextend adds one or more initialized physical volumes to an existing volume group.

Question 2

A mirror logical volume is created with 'lvcreate -m1'. What does the '1' specify?

Accepted Answer

Number of additional mirror copies (1 copy = 2 total legs)

Answer

The -m1 option creates 1 additional mirror copy, resulting in 2 total data copies (original + 1 mirror leg).

Question 3

What does the 'pvmove' command do in LVM?

Accepted Answer

Moves data extents from one physical volume to another

Answer

pvmove relocates physical extents from one PV to others in the same VG, enabling disk evacuation without downtime.

Question 4

Which LVM feature allows a logical volume to store data across multiple physical volumes for performance?

Accepted Answer

Striping

Answer

LVM striping (RAID 0) distributes data across multiple PVs in stripes, improving read/write performance.

Question 5

After removing a physical volume from a VG with vgreduce, what state is the PV in?

Accepted Answer

It remains initialized as a PV but belongs to no VG

Answer

After vgreduce, the PV retains its LVM metadata and remains a valid PV but is unassigned and can join another VG.

Linux Practice Test