Just added a WD1001FALS drive to my system. It's been idle for about 1/ 2h now and idle temp is kinda on the high side relative to my other drives. This WD drive is 39 C which is about 7 C hotter than my other HDD which is a 32 C. Room temp is 68 F. Is 39 C normal for this particular drive? If you have this particular HDD, please post your drive's idle temp.
Your idle and operating temps are going to depend a lot on your case.
I have a couple of WD10EADS (the "green" ones) in the lower drive bay of an Antec 900 case. The fan in the lower bay blows cool outside air over the drives. All three of my drives are running about 23 C.
If your case has no provision for directly cooling the drive, 39 C. does not seem out of line.
24C for mine, but the intake fan is directly blowing over it. 39C is fine for a hard drive honestly, as most are rated for anything between 0 and 60C or so.
------------------------------Asus P6T deluxe
i7 965 @ 4.2GHz (200*21), 1.384V
12GB Corsair Dominator DDR3-1600 CAS 7
Reply to cjl
How hot do your drives run wo/ the fan cooling them in comparison to with the fan running? Maybe wait for your room temp to stabilize (i.e. no direct sunlight, heat/AC running etc.) and see what the drive's idle is w/ the fan, unplug the fan (which you can do while the PC is running) and wait 1 h or so and check it again if you're willing.
Here is a shot of the temps pf all my drives, I don't have any of the blacks but there are three of the RE3 drives in there. And a shot of the cage which is right behind a 180mm intake fan.
------------------------------DFI LP UT X58-T3eH8|Core i7 920 @ 4000|TRUE Copper w/TR-FDB-2000 push-pull|G.SKILL PI Black 3x1GB PC3 16000| SeaSonic M12D SS-750|HIS HD 4670 512MB IceQ|4x 1tb WD RE3|1x Dvico FusionHDTV5 Gold 1x DViCO FusionHDTV7 Dual Express|1x WinTV-HVR-2250|FT01-BW
Reply to Ancient_1
30C for mine. It's in one of Thermaltake's iCage's for converting a 3x 5 1/2 bays into 3x HDD bays with a fan. The iCage is made of aluminum as well which probably helps. The other 2 drives in there are also running at 30C. The drives that are in the 3 1/2 HDD bays are running at 35C and they're made of plastic and have a fan as well. My case is the Thermaltake Advance Spedo.