Hello, I have a MBP Mid-2009 (5,3) with 8Gb RAM and 2 Seagate Momentus XT 500 Gb running FW SD25. The 2nd drive I put at my DVD's bay using the OWC Data Doubler adapter. My system seems to be normal but specifically with Virtual Machine software (Parallels Desktop 6) there is some interrupt storm happening. I use several other software and they seem to work just fine. More intriguing, if I boot my MBP holding CMD+OPT+P+R the problem doesn't happen and Parallels runs just fine. If I do a shutdown and start without CMD+OPT+P+R the problem come back. It is weird. I did a couple of sessions with a Parallels developer specialist who guided me to several tests and we end up observing there is a huge interrupt storm happening inside OSX. I was experiencing this before with Snow Leopard and now same thing with Lion. I'm not sure if this interrupt storm has to do with my 2nd drive running at the DVD SATA port which may confuse OSX when looking for a DVD and finding a HD. Another thing I have tried without success was downgrade the EFI to 1.6 which makes the SATA port works in 1.5Gbps. No change, same problem. So, I was thinking what CMD+OPT+P+R does that I could do via script avoiding me to always reset the RAM after a shutdown. Any hunch? Regards.