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Hard Drive disappears from Windows

+1 vote
On my Windows 7 PC I have a Western Digital Black 750 GB hard drive as a secondary drive.  It's been working fine for 2 years now but the other day it disappeared from Windows Explorer/My Computer.  After rebooting it shows up fine but the last 2 nights (I leave my computer on 24/7) I've seen blue screens of death.  I checked the SMART info on the drive with HDD Health and it says 100%.  What gives? Help!
asked 7 years ago in Computer Hardware by Chen Chung (410 points)

1 Answer

0 votes
I'm answering my own question because I found out the problem.  This happened again and I shut off the computer to take a look.  Everything looked connected and not loose, though when I turned the computer back on I heard this LOUD whirring, grinding sound.  Found out that it was from a fan, and the power supply from the fan was connected to the same power extension that my WD Cavier Black is also connected to.  I disconnected the fan from the extension and haven't had any problem.  

So if your OS stops seeing your hard drive and the hard drive has 100% health, it may well be a power issue- check what else is connected to the same power connector that branches to connect the power of your drive.  Disconnect those other devices or move them to another power rail from the power supply and see if your drive stops disappearing.  If so then the culprit may have been one of those devices such as a fan in my case (literally and figuratively).
answered 7 years ago by Chen Chung (410 points)

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