How to Reduce Logical Volume in Linux LVM

In this tutorial we learn how to reduce LV Size in linux.

Let’s take an example we have a LVM filesystem ‘ /dev/testvg/testlv’ with 5GB size which is mounted on /testlvm and we want to reduce this size to 3GB.

For this activity we need to unmount the filesystem using the below command.

# umount /testlvm

Now we need to check the filesystem for filesystem health using the below command.

#e2fsck –f /dev/testvg/testlv

After checking the filesystem successfully we need to resize the filesystem using the below command.

# resize2fs /dev/testvg/testlv 3G

After executing the above command we execute the below command to reduce the filesystem.

# lvreduce –L 3G /dev/testvg/testlv

Reduce Logical Volume

That’s it,after executing the above command our LV Size is reduced and then we need to remount filesystem and check the LV Size using the below commands.

# mount /testlvm

# df –h /testlvm

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How to Reduce Logical Volume in Linux LVM