Logical Volume Management

Question 1

Steps in Creating a logical volume

Answer 1

1. create lvm partitions
2. create PVs
3. create VG
4. create LV
5. Format LV
6. mount the volume

Question 1

Create physical volume

Answer 1

pvcreate /dev/vdb1 /dev/vdb2

Question 1

Create volume group

Answer 1

vgcreate vg01 /dev/vdb1 /dev/vdb2

Question 2

Create logical volume

Answer 2

lvcreate -n lv01 -L 300M vg01

lvcreate -n lv01 -l 32 vg01

Question 3

Show details of PV

Answer 3

pvdisplay

Question 4

Show details of LV

Answer 4

lvdisplay

Question 5

Show details of VG

Answer 5

vgdisplay

Question 6

Add a new PV to VG

Answer 6

vgextend vg01 /dev/vdb3

Question 7

extend the LV

Answer 7

lvextend -L +500M /dev/vg01/lv01

Question 8

Extend an XFS FS to the LV size

Answer 8

xfs_growfs /mnt/data/

Question 9

Extend an EXT4 FS to the LV size

Answer 9

resize2fs /dev/vg01/lv01

Question 10

Extend the size of a LV

Answer 10

1. Create partition
2. Create PV
3. Add PV to VG
4. Extend LV
5. Resize FS

Question 11

Extend Swap Space Logical Volumes

Answer 11

swapoff -v /dev/vg01/swap

lvextend -L +300M /dev/vg01/swap

mkswap /dev/vg01/swap

swapon /dev/vg01/swap

Question 12

Reduce Volume Group Storage

Answer 12

pvmove /dev/vdb3

vgreduce vg01 /dev/vdb3

Question 13

FS that support shrinking

Answer 13

ext3 ext4

Question 14

FS that do not support shriking

Answer 14

GFS2 and XFS

Question 15

Remove PV that is no longer required

Answer 15

lvremove /dev/vg01/lv01

Question 16

Remove VG that is no longer needed

Answer 16

vgremove vg01

Question 17

Remove PV that is no longer needed

Answer 17

pvremove /dev/vdb1 /dev/vdb2

Question 18

Prepare FS for removal of volumes

Answer 18

1. Move and Backup data
2. Umount FS
3. Remove any entry from /etc/fstab