The board ran initially as it should. And not exaggerated, they may have had 800 hours duration. Then this whirring noise ... from computer, wait a computer, noise was gone. But after 1 hour it was there again. Computer on, Oja, that sounds as if it would grind. Quickly a backup, it worked, albeit with interruptions. Okay, the backup took 5 hours after a further 2 hours was an access is no longer possible, lucky. The computer did not start again, SMART error after the BIOS test.
Too bad WD falls to me as drive manufacturers in the future, since I already with a notebook drive this brand also had bad luck. Now I have the Seagate 1TB Pipline, although the rotating is not as high, but keeps hopefully better.