VERY weird HDD problem

Jun 12, 2018
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I'm not a tech guru, just an ordinary user. The situation in a nutshell.

My secondary drive (1TB WD Caviar Blue, we'll call him Blue from now on) is not being recognised neither by windows nor in BIOS.

here's where it gets weird

- Doesn't make any weird, unusual noises (doesn't click like its head is stuck or smthn), it does make the usual power up sound

- Tried Blue on an Icy Box (external case for HDD) and then connected it, via USB3 to the same PC. It works fine, tested it for several hours.

- Tried 2 different 1 TB HDD drives on the same PC. Same connections, same cables etc as the faulty one, they worked just fine.

- Tried Blue again on the PC, worked for a day, then the same problem occurred. Immediately repeated the steps above, same results as before.

So, I'm a bit confused as to which component failed. The HDD seems to be working fine by its own, so are the cables and the rest of my setup.

Halp mi :(

(running an i5, 16gb of ram, win 8.1, tried cleaning and reinserting all of the components ofcourse before anything else)