I've read the posts here in the forums and none seen to answer this question so I will go and repost/edit what I have asked in a dead thread 
I have an iMac 27" Mid 2010 (2.8 i5 Quad), I replaced my failing HDD (smart failing, system lockups, etc), with a new one and been trying fan control software after fan control software and so far nothing worked.
I am runnning lion (10.7.2) and I've downloaded iMac fan control and applied the patch mentioned at another thread here in the forums where the OP patched the software for 64 bits and s.m.a.r.t. temperature reading.
I saw on most peoples screenshots that their desired speed is set to the one they selected, but on mine this is what I get.
Basically, I cant control the fan speed for just the HDD fan :/
Any ideas on what to do?
If I tell the fan to go faster it just works, but if i tone it down, no deal
Help please? I am going nuts with the noise this is making now
And I don't know what else to do 
Look at the HDD fan desired speed, its not what I set at all
not to mention the speed it is running at :/
Edit: Link for original dead thread, https://forums.macrumors.com/threads/1156571/
I have an iMac 27" Mid 2010 (2.8 i5 Quad), I replaced my failing HDD (smart failing, system lockups, etc), with a new one and been trying fan control software after fan control software and so far nothing worked.
I am runnning lion (10.7.2) and I've downloaded iMac fan control and applied the patch mentioned at another thread here in the forums where the OP patched the software for 64 bits and s.m.a.r.t. temperature reading.
I saw on most peoples screenshots that their desired speed is set to the one they selected, but on mine this is what I get.

Basically, I cant control the fan speed for just the HDD fan :/
Any ideas on what to do?
If I tell the fan to go faster it just works, but if i tone it down, no deal
Help please? I am going nuts with the noise this is making now
Look at the HDD fan desired speed, its not what I set at all
Edit: Link for original dead thread, https://forums.macrumors.com/threads/1156571/