I recently had an issue where my computer was unusable, and hard drive was always at 100%, so I tested the hard drive, and sure enough, it said something along the lines of "too many failures", which I assumed to mean my hard drive was crashing, and being 7 years old, I assumed it was true.
So I just bought a new WD Black 1TB drive. I had some trouble installing Windows, which seemed like it may have been another HD issue, but on the 3rd try, it finally installed (I had to disconnect my 2nd drive). I got it up and working, and it's been fine for around 3 weeks of low usage, but now it's showing the same symptoms as the first drive. 100% usage in task manager, but my individual processes are sometimes showing 0.1 MB/s or less with 100% disk usage. I can't get perfomance monitor to come up, as windows is pretty much unusable and it takes 5+ minutes to get the start menu and other things to work.
It seems unlikely that the same systems across hard drives would show up. Can someone guess as to whether this is an issue with the SATA cable, or is this an issue on the motherboard? My 2nd drive with pictures and other files does not seem to have a problem.