Oracle VM Server for SPARC 3.6 Administration Guide Using Virtual Disks Managing Virtual Disks How to Change Virtual Disk Options How to Change Virtual Disk Options For more information about virtual disk options, see Virtual Disk Back End Options. After a back end is exported from the service domain, you can change the virtual disk options.primary# ldm set-vdsdev options=[{ro,slice,excl}] volume-name@service-name