I bought a second dvd drive, a 216d Pioneer, for my Nehalem 2.26 octad. After a reboot it will work for a bit and then give me an error message (code # 0x80020025). The second, Pioneer drive (along with whatever disk was in it) is then no longer visible via the finder. A reboot makes the drive and disk visible again, but the error will invariably return. I believe the firmware on the drive is current (1.09) and it is listed as having "generic drive support" system profiler. I haven't had any luck tracking down a solution in this or other forums, so any help would be greatly appreciated.