Veritas VM on Unixware, how to remove the "rootdg"?

I want to remove the rootdg to create my own group, and use 4 disk, this is the situation System is Unixware 7 vxdisk list DEVICE TYPE DISK GROUP STATUS c0b0t1d0s0 sliced - - error c0b0t2d0s0 sliced disk01 rootdg online c0b0t3d0s0 sliced - - online c0b0t4d0s0 sliced - - online c0b0t5d0s0 sliced - - online The command vxdg rmdisk disk01 fail vxdg rmdisk disk01 vxvm:vxdg: ERROR: disassociating disk-media disk01: Cannot remove last disk in disk group The commands vxdg deport rootdg fail vxdg deport rootdg vxvm:vxdg: ERROR: Disk group rootdg: deport failed: Operation not allowed on root disk group the command vxdg destroy rootdg don't exist on Unixware The command vxdiskunsetup don't exist on Unixware EDIT1: I don't boot from a rootdg, / is mounted on normal partition on (c0b0t1d0s0 which is not under Veritas vxvm control)