Are my HDDs too cold?

[Koala]

I recently finished building and doing burin in for my system. I installed FreeNAS last night and everything is going well so far, have a jail running HDHomeRun DVR, all fine. Here is my system:

• FreeNAS 9.10 Stable
• Supermicro X10SL7
• Intel Xeon 1231v3
• 4*8GB Crucial CT102472BD160B
• (6)WD30EFRX WD Red 3TB in RAIDZ2
• 250 GB Samsung 850 Evo (Jails)
• 16GB SATADOM-SV 3ME3 (boot)
• EVGA 220-G2-0550-Y1
• Lian Li v358b

My case has 2 fans right in front of the HDDs, in which I have some Delta AFC1212D-PWM 120mm fans that idle at 1500RPM. I'm starting to think these are overkill. My HDDs sit at 27-29C when not doing anything. I started copying large files around to see if I could create some load and they never moved above 29C. I heard that low temps were as bad for fans as high temps so I was wondering if I need to rethink my cooling strategy and go for something quieter but warmer?

 

[Mirfster]

I would love it if my drives were 28-33 constantly... You're just bragging.. :P

 

[SweetAndLow]

Yes drives can be to cold but you are probably fine. As long as you don't have crazy low temps then crazy high temps I think things are fine. Sometimes my drive's hit 19c which is probably too cold, lol.