I really want to keep using my swappable drive trays and yet I have seen an increase in temp. when I do. Part of the cost of convenience I guess. Anyway, I get a temp of 80-95 F when I am outside of the tray and it rises to a max of 115 F when I use the tray. I am sure I will go above 120 F when Summer hits.
The drive (WD) is rated to 131 F. Any of you have a gut feel about what the added heat is costing me? I need some reassurance. 
Thanks
Do they have a fitting space (in the main unit) for a 40mm fan?
The tray has a fan in it already. The temps are with fan.
Hey chase0039 maybe you can find out the Fan speed and replace the fan with a higher speed fan. More noise though.
No problems with noise. High speed 40mm fans are hard to find. Are you guys indicating that you don’t like that temp. either?
Seems pretty high but I really have no expeirence with swappable HDD setups. Here is what mine normaly runs at. 27 degrees C = 80.6 Degrees F.
The temperature of my current HDD (Samsung SP1203N) never rises more than 25 C.
Previous Maxtor 2F040L0 was heated up to 50 C :), but it did not influence on its health in any way.
I think, that normal temperatures for HHDs of different manufactures can very different. One more warm, others - less.
And I have never seen hard drives, that was broken because of overheating.
I decided to make it a weekend project and I rewired my case to add another 120mm fan right above the hard drive. So far I have been able to keep the temp. the same as my other drives running below with 2 fans blowing over them. I think I rarely get above 100 F now so I am fine until summer.
Thanks for all the input.