Horizontally to use only?

I have purchased a 3TB Pro on a PC dealer on 10/24/2014. It was built in a Fractal Design Node 304 housing. There, the hard drives are hooked vertically. From the outset, she made "clack end" noise and worked the first few days as far as normal. After 5 days, the noises were much louder and she gave up the ghost.
Access via the Windows Explorer was no longer possible.

On 11/03/2014 I swapped to the hard drive, and the new made exactly the same noises. I could indeed her in the Disk Management initially assign a drive letter, a formatting for GPT Partion was not possible.
Windows on strike! On 04/11/2014 back to the dealer and there they worked strangely enough properly!
But the test was done in an adjoining room, I was not there so. The board home, installed and the theater started again. I built from the plate and put it horizontally on the HDD suspension - and it worked suddenly perfectly. No noise and nice and quiet. How can that be?
@ WD: These are a Pro (professional) - version, is only horizontal installation? What do your test?

I 8x WD Red (7x 3 TB and 4 TB 1x) in my 2 computers and do not these quirks. Whatever the situation, these things work (2 of them arrived but already broken with me, but that's another story).

All ends well (almost) good - I built it in my Fractal Design Define R4, There in a horizontal position, and it is finite.
But again I do not do this to me ... why only concise, well probably end 3 points.