Categories:- Unix Commands

How to extend or increase the size of LVM partitions

LVM  stands for Logical Volume Manager. One of the biggest advantage of lvm partitions is  that we can extend  file-system size using lvextend command.


I am taking the example of /home partition which is lvm based , currently /home is of 5GB , We will extend the size to 7GB , means we have to  add 2GB space. 


Steps to Extend the size of /home by 2GB


Step:1 Check the space using below command



Step:2  After extending the size of /home by 2GB, it should be 7GB.


Umount /home partition using below command


[root@localhost ~]# umount /home/


Step:3 #lvextend –L +2G /dev/mapper/VolGroup-LogVol101


Step:4 Use resize2fs to resize the ext2,ext3 & ext4 file system



Use e2fsck command to check the file system as shown below



Now Mount /home using mount command and check the space using df command



Note : lvextend uses free space of the volume group for extending the size.To check the free size of volume group use vgs or vgdisplay command.


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