Solaris live upgrade - how to check if a fs is shared or not

Hi all,

1) how do i check which FS(filesystems) in the current active PBE are shared and not shared with the ABE (alternate boot env) ?

is doing lufslist and comparing between the 2 BEs the only option ?

2) when doing a luactivate -s (synchronize), does the synchronization go both way or 1 way only ? (e.g. from the current BE to the ABE only)

Regards,
Noob