Oh, I have got it
When you select SCSi it means interface not disk, you cannot add real disk to vm (raw disk)
Feature is coming , but it is not in current release
That not what I'm trying to do. I created a VM disk and used the SCSI interface and when I go to install the OS "10.5.4 Server" it not able to see the disk as a target to install on. I have try this with both 10.5.6 Leopard Client and 10.5.6 Leopard Server as my host system.