Hmmm, there was some bug regarding this, but it's solved for some time. You can read more about this problem eg. here http://groups.google.com/group/comp.unix.solaris/browse_thread/thread/175b4c25ac31eca1
So either this bug is back or there maybe something with your machine. So first of all check if you have latest BIOS and then either update to latest build or do clean install from latest iso which you can find here http://www.genunix.org How-To for system update : pfexec pkg set-authority -P -O http://pkg.opensolaris.org/contrib/ contrib pfexec pkg unset-authority opensolaris.org pfexec pkg set-authority -P -O http://pkg.opensolaris.org/dev/ opensolaris.org pfexec pkg image-update -v -- This message posted from opensolaris.org