Thick provisioning
In VIOS Version 2.2.1.3, or later, you can use a thick-provisioned virtual disk. In a thick-provisioned virtual disk, you can allocate or reserve storage space while initially provisioning the virtual disk. The allocated storage space for the thick-provisioned virtual disk is guaranteed. This operation ensures that there are no failures because of lack of storage space. By using thick-provisioning, initial storage in the virtual disk is faster because disk blocks might be allocated to the disk during initial provisioning of the virtual disk.
