The disk space used during the upgrade process depends on how the hypervisor internally handles the disk lifecycle for an instance. The following table shows Ribbon's recommendation for extra disk space for different types of nodes/instances: *Extra disk space applicable only during the upgrade process, in addition to the disk space requirement for the instance. Total disk space requirement during upgrade = Disk Space for the upgraded instance + extra disk space required only during upgrade ** Starting with SBC v07.01.00, SBC Configurator is discontinued.Minimum Disk Space Requirements for SWe Upgrades