Use this page to specify a new boot disk, if applicable.
The Boot Disk page shows a table with all disks that have been marked as essential on the previous System Disks page. You have to declare one of these disks as the boot disk. z/VM Center will attempt to boot the operating system instance from this disk when the z/VM virtual server is activated.
You cannot change the boot disk using this wizard. Only select a different boot disk if a different boot disk has been provide outside z/VM Center.