In this article, we will show you how to increase the size an existing volume on your server.
This allows you to modify your partitioning to how you would like.
Please note: This article describes significant changes to the file system of your server. Before increasing the size of the existing volume, perform a data backup to avoid data loss.
To check the size of the logical volume and its free capacity, enter the following command:
vgdisplay -v vg00
The free capacity is displayed in the Free PE/Size line.
You can enlarge the volume using the lvextend command. To use all available disk space to increase the volume, enter the lvextend command in the format lvextend -l +100%FREE /dev/VOLUMEGROUP/LOGICALVOLUME
[root@9794c2d ~]# lvextend -l +100%FREE /dev/vg00/home Size of logical volume vg00/home changed from 10.00 GiB (2560 extents) to 399.19 GiB (102192 extents). Logical volume home successfully resized.
To increase a logical volume by 10 GB, type the lvextend command in the following format:
lvextend -l +10G /dev/VOLUMEGROUP/LOGICALVOLUME
In the example below, a logical volume is expanded from 4 GB to 14 GB:
root@localhost ~]# lvextend -l +10G /dev/vg00/var
After entering the command, the following message is displayed:
Extending logical volume var to 14.00 GB Logical volume var successfully resized
To display the file systems of the partitions, enter the command blkid.
Please note: The file system appears at the end of the line after the TYPE= entry.
/dev/md1: LABEL="root" UUID="1aff71de-fa12-44c2-8d2d-cd51cb0eb19b" TYPE="ext3"
To be able to use the additional storage space, you must enlarge the file system. The table below lists examples for the different file systems.
|File system||Example||Special feature|
|Ext 2,3,4||resize2fs /dev/vg00/var|
|ReiserFS||resize_reiserfs -f /dev/vg00/var|
|JFS||mount -o remount,resize /var||Since kernel 2.6 the new volume size is given in blocks (for this example the command is: mount -o remount, resize=1048576 /var ).|
Finally, you can immediately check the change with the df command:
To check the changes to the logical volume, type the following command:
df -h /var/