To extend and cut back the scale for the LVM is extremely vital half and it will cause the filing system corruption issue thus whereas running the subsequent commands make certain that you just have elect the proper LVM plotter.

To decrease the LVM size run the subsequent command as a root user.

[root@super ~]# lvreduce -L1G /dev/testLVM/undertestLVM1

In on top of example we've got shrivelled the LVM by 1G

To increase the LVM size run the subsequent command as a root user.

[root@super ~]# lvextend -L1.5G /dev/testLVM/undertestLVM1

In on top of example we've got augmented the LVM size by one.5G

Now check the scale of LVM

lvdisplay /dev/testLVM/undertestLVM1


Note : don't bit DECREASE MAIN LVM plotter ELSE SERVER filing system can CRASH.