I have a system I can no longer boot. I raid the system for CPU/MEM boards when production systems have issues and I recently swapped board 0's. The production system took it fine, but this system now appears to be looking for the wrong device paths at the OBP and therefore cannot boot. Does anyone know of a way to rectify without doing manual changes to all the devaliases. At OBP... {0} ok boot disk Boot device: /sbus@3,0/SUNW,fas@3,8800000/sd@0,0 File and args: Can't open boot device At format booted off cdrom in single user my root disk is... 0. c0t0d0 <SEAGATE-ST318404LC-0002 cyl 14187 alt 2 hd 6 sec 421> /sbus@2,0/QLGC,isp@1,10000/sd@0,0 As stated all my devaliases are now incorrect as they all are sbus@3 and should probably all be sbus@2. I have one more board on system. Do I need to copy nvsram over or something? Any thoughts welcome as I am looking for a systematic approach instead of manual.