The virtual install disk is a holding place within the system ROM that contains embedded boot drivers (such as SCSI or RAID controller drivers) that may be necessary to complete the operating system installation. Typically, boot drivers that are placed in the virtual install disk are either not included as part of the operating system media or are updated for new controllers. Supported operating systems automatically find these drivers, eliminating the need for user intervention. HP recommends updating these boot drivers to the latest version after the OS install to further optimize the system. The Virtual Install Disk option is found under the Advanced Options menu and can be enabled or disabled in RBSU.