I saw the same behavior on servers with S5000PAL MB when trying to install opensolaris SXCE b91
But this only happened when we did an install via jumpstart with a profile for a mirrored systemdisk, and the problem was seen during the first boot (so install was not an issue) The problem was work arround by disabling the microkernel updates: we just removed /kernel/i86pc/ucode Does this problem occur during install? or during first boot? If it's during install, does the microroot has this /kernel/i86pc/ucode ?, if yes you maybe have to modify the microroot and build a new iso. see: http://docs.sun.com/app/docs/doc/820-4078/ggmsj?l=ru&a=view & https://www.opensolaris.org/jive/thread.jspa?messageID=231156&tstart=0 for more info maybe it's related. Kristof -- This message posted from opensolaris.org