Two comments why do you not put the metadb across 2 physical disks? Would that not be part of the ideal of mirroring? Or do the -af -c 2 done twice actually give you a -af -c 4 ?
You say edit vfstab and turn on logging. For a linux person on solaris I aint too sure about that. Any clues?
I would appreciate 10 seconds on lockfs -fa - why not just sync?