Solaris support for the EFI disk label is available on x86 systems. Use the following command to add an EFI label on an x86 system:
# format -e >  SMI Label >  EFI Label > Specify Label type: 1 > WARNING: converting this device to EFI labels will erase all current > fdisk partition information. Continue? yes
Previous label information is not converted to the EFI disk label.
You will have to recreate the label's partition information manually with the format command. You cannot use the fdisk command on a disk with an EFI label that is 2 terabytes in size. If the fdisk command is run on disk that is greater than 2Tbytes in size to create a Solaris partition, the Solaris partition is limited to 2 Tbytes. For more information about EFI disk labels, see the preceding section.