amd64 refers to the instruction set, not the CPU brand (64-bit x86 was originally introduced by AMD and then copied by Intel, hence it is called amd64). The E5405 is 64-bit capable, and the X2250 is supported by OpenSolaris and Solaris 10, so it should work without any issues (going back to 32 bit is not the answer). I would check - 1. 64-bit support being enabled in BIOS 2. Reset BIOS to default configuration 3. Remove any weird devices 4. Startup with verbose kernel option 5. Try booting with OpenSolaris / Solaris 10 to ensure it's not a separate hardware issue (memory, etc.). I have my system running on a Xeon E5-2603 with few problems (Solaris 11 does not boot on this machine due to unsupported chipset) and many others also use Xeon processors with no issues. <div class="gmail_quote"> On Sun, Sep 30, 2012 at 1:48 PM, Michael Mounteney <<a href="mailto:michael@landcroft.co.uk" target="_blank">michael@landcroft.co.uk</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> Tried to boot the CD on a Sun X2250 (Intel Xeon E5405), panicked when detecting devices at boot time. No surprises there --- the grub boot command has kernel ..../amd64/unix It's easy to search the CD and find another kernel, but it's 32 bit and there does not appear to be a boot_archive module for it. So ... is OmniOS supposed to boot on Xeon ? Michael. _______________________________________________ OmniOS-discuss mailing list <a href="mailto:OmniOS-discuss@lists.omniti.com">OmniOS-discuss@lists.omniti.com</a> <a href="http://lists.omniti.com/mailman/listinfo/omnios-discuss" target="_blank">http://lists.omniti.com/mailman/listinfo/omnios-discuss</a> </blockquote></div>