Which Enclosure did you use, because the drive does get hot, and I would prefer FW800 over USB 2.0
It's a problem, and I believe FW800 is going to be much worse with heat than USB.
I'm pretty sure your not going to find an enclosure that will fit these drives. I strongly suggest that you don't buy anything by spec, as it's just too difficult to gauge if your going to get lucky with a fit. ALL enclosures will be for the smaller sizes and they tend to design them for a tight fit, obviously. I have one that used rubber supports so I took those out and it fit (barely). Another solution that I use that I actually like a lot is a simple cheap case mod.
My solution is sort of lame but I'm happy with it. I bought several aluminum 2.5" enclosures far about $6 a piece at amazon.(link below)
I just cut a couple small pieces of the top front case (just enough to fit the port and light) and then wrap around a couple pieces of electrical tape to hold it together (the aluminum can be cut with regular scissors). The un-modded cases are just held together by friction (very cheap), so the tape is a good idea even with a regular 9mm drive. Works really well and it is going to dissipate heat as good as anything. So what you have is basically, a drive with an aluminum wrapper. Everything is pretty much covered up. Very minimal. I actually use this rather than the regular USB case that fit this (probably the only one in existence that does (discontinued). I have two of these 14mm drives I did this way.
http://www.amazon.com/SATA-Hard-Dri...A91C/ref=sr_1_3?ie=UTF8&qid=1317148791&sr=8-3
you can get these a number of places. Very common. I have about 4 and they never have failed (inspite of any reviews). I like these cases a lot as they are simple and very light, and seem to work as good as any.
Actually, the only reason I would suggest this sort of thing, is that for the life of me, I could not find another solution, and the heat build-up made me nervous.
