I have posted a video of the boot process here: http://www.youtube.com/watch?v=YQ6ofQaRLQo
I just built this system, booted using the live disc and everything went well. I installed on to an internal IDE/ATA drive. The DVDROM is also on the IDE bus. I then swapped out the power supply, added 2 SATA drives (keeping the original boot disk), and a fan. It started booting fine, then basically what you see in the video happened. Now, when I boot off of the HD I am immediately brought to a grub console with no menu options. If I boot off the live disc, you can see what happens. I've tried adding "-B disable-acpi_drv=true" to the boot line and it didn't help. I also tried removing the 2 SATA drives, with no luck. Any suggestions? This message posted from opensolaris.org