Prior to the Solaris 10 5/08 OS release, the slice option did not exist, and volumes were exported as single slice disks. If you have a configuration exporting volumes as virtual disks and if you upgrade the system to the Solaris 10 5/08 OS, volumes are now exported as full disks instead of single slice disks. To preserve the old behavior and to have your volumes exported as single slice disks, you need to do either of the following:
Use the ldm set-vdsdev command in Logical Domains 1.3 software, and set the slice option for all volumes you want to export as single slice disks. Refer to the ldm(1M) man page for more information about this command.
Add the following line to the /etc/system file on the service domain.
set vds:vd_volume_force_slice = 1
Setting this tunable forces the export of all volumes as single slice disks, and you cannot export any volume as a full disk.