Sometimes it turns out, your initial sizing of a VM might have been too small. While RAM and CPU can easily be extended, Disk, on the other hand, might be a different story but usually, the process is rather simple. This is how I tend to do extend a disk that is used by LVM. First, resize the VM's disk on the hypervisor, note that this command is specific for KVM [archy@hyv01 ~]$ sudo virsh blockresize --domain repo.archyslife.lan --path /srv/kvm/vm-images/repo.archyslife.lan-disk1.qcow2 --size 250G You can verify your changes by running this command [root@hyv01 ~]# sudo virsh domblkinfo --domain repo.archyslife.lan --device vda --human Capacity: 250.000 GiB Allocation: 199.435 GiB Physical: 250.000 GiB If you are using virtio (like me in this example), the disk should automatically be resized in the VM and you can continue to resize the partition or physical volume. If you're resizing a SATA / SAS / SCSI Disk, you'll have to make the VM resca...