- One advantage of LVM is you can resizean LV with non-contiguous drive space.
- In this example, another drive is being added to the LVM.
- Get a list of the partitions with
cat /proc/partitions
- In this case, the new drive is
/dev/vdc
- Need to put a partition on that, for that we need to use
gdisk –> sudo gdisk /dev/vdc
n for new partition.- Select the defaults.
p for printing the partition table.
- Check again with
cat /proc/partitions and the logical vdc1.
- Run
partprobe if you don’t see the new partition in the list.
- To create a physical volume,
sudo pvcreate /dev/vdc1
- Then verify with
sudo pvs. You can see it is not part of a Volume Group.
- Now we can check all of the available Volume Groups:
sudo vgs
- We can extend
vgdata by adding a new physical volume to it.
sudo vgextend vgdata /dev/vdc1
- Then again run
sudo vgs and you’ll see the vgdata group is a lot larger.
- Then we need to resize the logical volume.
- Use
lvresize then we verify the logical volume size first type.
- Then do
sudo lvs you’ll still see the volume group is 500MB, something like:
sudo lvresize -l 100%FREE /dev/vgdata/lvdata
- When specifying a logical volume, we provide it the full path.
- If you do
sudo lvs again, the logical volume will be much larger.
- To see the file size, just run
df -h
- In the above example, the file system is
XFS, so it will still be the same size.
- For that, we use
xfs_growfs to resize it.
sudo xfs_growfs /dev/vgdata/lvdata
- Then verify with
df -h
- It will then be expanded to the new file system size.
- If it were
EXT3 or EXT4, we use resize2fs.
- The
lvsize command can also resize partitions as well. Older versions cannot.