You cannot. That's why I suggested two years ago that they chop off 1%
from the end of the disk at install time to equalize drive sizes. That
way you you wouldn't run into this problem trying to replace disks
from a different vendor or different batch. The response was that Sun
makes sure all
I'm (still) running snv_134 on a home server. My main pool tank filled up
last night ( 1G free remaining ).
So today I bought new drives, adding them one at a time running format between
each one to see what name they received.
As I had a pair of names, I zpool create/add newtank mirror cxxt0do