Mysterious Hard Disk Failure?

That SATA error is not good, but can only really be diagnosed by trying the following:

• pop this disk in another box
• put another disk in this box

That will narrow it down. If the disk still fails in the other box, try and get the data off it if it gives you some uptime, then ditch it

If the other disk fails in your computer, it is the SATA card, replace it (or if SATA is on the motherboard - you'll need to look at replacing the motherboard)

Buy a new one, its broken. Now I hope everything works fine. Update the second one worked for 6 days and now it is broken again. I will exchange it for a new model and hope for a little bit luck.