I have an Early 2000 4,1 that I upgraded the firmware on to make it a 5,1. I have two different RAID0 setup using the built in SATA2 drive bays: "Macintosh HD" (2xSSD) and "RAID" (2xHDD). I bought a RocketRAID 640L with the intentions of booting my Macintosh HD off of it. The RocketRAID didn't work at all under 10.7, but once I upgraded to 10.8.5, the OS would at least see the "RAID" volume connected to it. However, I can't seem to boot off of it.
Furthermore, I can't seem to boot off of the installation DVD anymore nor from a TimeMachine drive (to do a system restore).
Has anyone else had this trouble when upgrading the FW on a 4,1 to make it a 5,1? It's running stably, but I'm concerned I don't have any ways to recover when a drive crashes.