Additional hard drive not detected in BIOS

siler

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Oct 16, 2014
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So I'm working on a server which has a Tyan S2937 motherboard, and 2 CPUs. I have a drive bay capable of supporting 6 drives, and the motherboard has 6 SATA connectors.

I want to setup the system with 3 drives. So, I have 3 500GB SATA Seagate Barracudas. I insert the 3 drives into drivebay 1, 2 and 3 respectively. I then hook up all 3 of them to the motherboard via the SATA cables.

When I boot up I enter the BIOS setup. For some reason, only the drives in bays 1 and 2 are detected. The drive in bay 3 is not detected, and in fact the blue LED powerlight on that 3rd drive bay does not even turn on when I power on the server.

So now I'm trying to troubleshoot this. My first thought was perhaps the power supply cannot handle 3 drives - but the server has a 600W power supply, which should be more than enough. I double-checked using an online PSU calculator and the requirements came out to well below 600W.

So I tried all the usual things:

(1) Assuming the 3rd drive might simply be bad, I inserted a different drive (the same model and size) into bay 3. The system still didn't detect it.

(2) I tried a different SATA cable. Still nothing.

I'm pretty much out of ideas here.

Can anyone suggest some other troubleshooting tips for determining why the 3rd drive isn't detected?
 
Solution
Try plugging the third drive into a different SATA port on the motherboard and see if that helps. It may be that whichever port you're plugging that drive into just isn't working properly.

Another thing you might try is switching the power connectors - use a known good one (one of the plugs powering drive #1 or #2) and try it on the third drive instead. It could be that one of the power plugs is dead for whatever reason, which is rare but can happen.

Pretty basic stuff I know, but always check the easy things first.
Try plugging the third drive into a different SATA port on the motherboard and see if that helps. It may be that whichever port you're plugging that drive into just isn't working properly.

Another thing you might try is switching the power connectors - use a known good one (one of the plugs powering drive #1 or #2) and try it on the third drive instead. It could be that one of the power plugs is dead for whatever reason, which is rare but can happen.

Pretty basic stuff I know, but always check the easy things first.
 
Solution