Turn off HDD fan

[Monart]

How could the HDD fan be turned off? It's plugged onto the motherboard and is easily unplugged, but this causes a message at bootup and about fan failure, along with periodic messages later about cooling device failure. The BIOS doesn't offer any settings to turn off the fan or the messages.

I've just replaced a 3.5" HDD with a 2.5" HDD, which runs cooler and doesn't need the fan, so it would be quieter without the fan. This is in a Small Form Factor Dell Optiplex 755. Thanks for your help.

 

[CaedenV]

That fan first blows through your CPU and then blows by the HDD, so it is necessary. Do not remove it, do not unplug it, you will overheat your CPU if you do.

 

[geekapproved]

Dude, you bought a Dell, what did you expect?

You'll need to plug the fan back in or you'll keep getting the message.

 

[RetiredChief]

HDDs do not have a fan, be it a 2 1/2 or a 3 1/2 in drive normally do not need a fan.
The case fans are need to cool your CPU, your ram, your VRs, and the GPU, and if disabled these componets can get very HOT.

 

[Monart]

Thanks for your efforts, but, they're no help. As I wrote, it's the HDD fan (attached to the frame that holds the drive) that I want to turn off -- not the CPU fan or the power supply fan. The fan for the HDD is connected directly by wire to pins on the motherboard. And, I obviously already know that I can stop the messages if I keep the fan plugged in.

Any other suggestions?

 

[RetiredChief]

The fan is not to just cool the HDDs, It is used to draw fresh air into the computer from the front. It compliments the rear exhaust.

 

[Monart]

The fan is not to just cool the HDDs, It is used to draw fresh air into the computer from the front. It compliments the rear exhaust.

Thanks, but the fan I'm talking about is solely for the HDD; it's attached to the underside of the frame to which the HDD is mounted. Unplugging it will not affect the rear exhaust.

 

[RetiredChief]

There are only two ways to disable the warning.
If the BIOS is issuing it and you can NOT disable the warning, then check for software and disable it there.

 

[Monart]

There is no software for it. It's a motherboard/BIOS control, which I need to turn off. I may just have to tolerate the fan noise. Thanks, anyway.

 

[puckettonline]

There is no software for it. It's a motherboard/BIOS control, which I need to turn off. I may just have to tolerate the fan noise. Thanks, anyway.

or you can just get a smaller fan/cut the wire so it thinks it's connected

 

[Spokane Valley PC Tech]

Seems nobody has offered a viable solution? Yes, this fan is solely for the hard drive and is not needed if you are upgrading to a SSD.(There are 2 more fans designated for the CPU) These are still good socket 775 machines for the average office environment or someone with limited space. Disabling this fan would eliminate one more part to maintain and also conserve energy. Unless Dell offers a Bios revision to the A22, we are stuck keeping this fan installed(if you dont mind the startup halt). The upgrade to Solid State Drives is like putting a supercharger on your car! Just Do It!

 

[Kludger]

Assuming similar BIOS to Opti 745, the fan presence is registered by (tach?) signal on the yellow wire of 5-pin fan socket, per http://commweb-ps3.us.dell.com/support-forums/desktop/f/3514/t/19521443 A jumper from the cpu fan yellow pin to the corresponding pin on HDD fan socket makes the bios think there's an HDD fan in place. BTW, on the 745 SFF, it looks like the HDD fan pulls air thru the NorthBridge heatsink. With SDD, low power GPU card, and the CPU fan reversed to exhaust out the front (instead of onto NorthBridge), temps and sones in the SFF are managable without the HDD fan/drive bracket.

 

[zuruiboy]

Assuming similar BIOS to Opti 745, the fan presence is registered by (tach?) signal on the yellow wire of 5-pin fan socket, per http://commweb-ps3.us.dell.com/support-forums/desktop/f/3514/t/19521443 A jumper from the cpu fan yellow pin to the corresponding pin on HDD fan socket makes the bios think there's an HDD fan in place. BTW, on the 745 SFF, it looks like the HDD fan pulls air thru the NorthBridge heatsink. With SDD, low power GPU card, and the CPU fan reversed to exhaust out the front (instead of onto NorthBridge), temps and sones in the SFF are managable without the HDD fan/drive bracket.

Link has moved to: http://en.community.dell.com/support-forums/desktop/f/3514/t/19521443

 

[netboygold]

HDDs do not have a fan, be it a 2 1/2 or a 3 1/2 in drive normally do not need a fan.
The case fans are need to cool your CPU, your ram, your VRs, and the GPU, and if disabled these componets can get very HOT.

Have you ever even seen the inside of any of these model Dells? Or did you have trouble reading the problem? He is talking about the fan directly under the hard disk, not the CPU fans. If you don't have any useful info to help this problem then don't comment.