EFI or SMI for zpool

Here is what we do at the moment but not sure if this is correct:-

1. LUN is presented to primary domain.

2. Left as SMI but use format to ensure everything in slice 0 (i.e. equal to slice 2)

3. vds-dev created by adding s2 (i.e. /dev/dks/'disk-id's2)

4. vdisk exported to ldom

Is this correct? Or should we be EFI labelling the disk and creating vds-dev using entire disk (i.e. no s2)?

On the ldom,

5. Format disk to ensure everything is in slice 0 again.

6. Create zpool using s0. e.g rpool create test c0d0s0

Is this correct? Or should be be adding WITHOUT s0 (e.g. c0d0)? Noticed that disk on ldom is labelled as EFI if you do it this way.