I've got the 2009 model 13 MBP, 2.26ghz. Recently (Black Friday), I took advantage of a good deal on an SSD, and ordered that and the MCE optibay. (By the way, the enclosure MCE gives you is a terrible setup. I've seen a few of the other companies in that service give nice-looking aluminum enclosures that most importantly don't use 2 usb slots.) When I got the SSD, I installed it in the hard drive space just fine - the efi wouldn't recognize it at first so I made a fresh install of SL on a spare hdd, cloned it to the SSD, and it worked fine. But that's not the issue. A day or two later, when the optibay came in the mail, I tried to configure things so that my 640gb hdd was in the apple-designated spot so it could take advantage of the sudden motion sensors. On bootup, it would take more than a minute for rEFIt to load. Then I could select the operating system, but it would load for like three or four minutes (the apple and the rotating circle), before finally stopping any pretense of loading, and just freezing. No bootup. I tested it with only the ssd in the optibay. Problem persisted. With only the ssd in the hdd-spot, as per my original setup, and it worked fine again. As a compromise, I've installed the hdd in the optibay slot and the ssd in the primary, and that seems to be working fine so far. But I'm concerned about the hdd's vulnerability in this setup. So I'm basically asking two questions: 1. Is this issue familiar to any of you, or do you have any advice in troubleshooting it? 2. How significant of a risk do you think I'm really taking by leaving the hdd where it is right now? Oh, and as a side-note, system profiler was saying that my optibay hdd's negotiated link speed was 1.5 Gb/s yesterday (I've seen a few other people notice this, and it doesn't concern me), but today it's back at 3 Gb/s. Any ideas on why it would be reading differently?