Home > Storage > Unity XT > Virtualization, Cloud & Applications > Dell EMC Unity: VMware vSphere Best Practices > Dell Technologies Unity provisioning
Dell Technologies Unity storage offers thin provisioning as a recommended option when creating block storage and requires thin provisioning to enable compression. Utilizing thin provisioning within VMware on virtual disks does not initially result in additional space efficiency when thin provisioning is enabled on the array. However, the ability to reclaim space from within a compatible guest OS does require thin provisioning to be used on both the storage and the virtual disks. Additional requirements for space reclamation within the guest include the following:
Virtual machines on VMFS 6 datastores
Virtual machines on VMFS 5 datastores