RaidFrame with unequal size replacements

[Chris Ross <cross+netbsd%distal.com@localhost>]

  I worry I may be "in a pickle" here.  I have a sparc64, that has a  
raidframe raid1.  I lost a disk recently, and the replacement has  
arrived, but appears to be a few sectors (143363688 vs 143538120)  
smaller than the one it's replacing. and the pair in the raidframe.

  So, the first question is, does raidframe know how to deal with  
this?  I doubt it, given that dynamically sized filesystems don't, as  
far as I know, exist in NetBSD.  The next question would be, any  
suggestions on how to fix it?  Only idea I have is to build a  
secondary RAID1, with only one disk in it (the new smaller one), then  
build a new system onto that, and then kill the old RAID making the  
one remaining disk in it be the partner to the new disk in the new  
RAID.  But, I don't want to walk down that path without asking for  
help.  Maybe there's something easier I could do.

  Any RAIDframe experienced and/or expert people that have any  
suggestions?  Thanks...

                    - Chris