xtremegamer wrote:One week so that was the problem
Your meaning is not clear to me.
Now I have looked again at the graphs and text that you sent, and I see that your text is confusing me.
You said that the 1TB disk was performing normally - so therefore I thought that the good (all green) error scan graphic that you sent, was from the 1TB disk. But now I see that both graphics are from 500GB disks - is this the same 500GB disk for both pictures? If so, why did you send 2 error scan graphics from one disk? Obviously the 2nd (all green) error scan looks normal - but why did you send 2 error scan graphics and only 1 benchmark graphic? It is not clear what you are trying to say
I still believe the 500GB drive has a marginal fault (the SMART 0xC3 "worst" value is unusually low) and that fits with a marginal problem for the drive to read the data. Also, a marginal read problem inside the drive could also produce the benchmark graph shape. The benchmark graph shape is usually a good indication of whether the drive is able to read normally or not. Compare the benchmark graph shapes between the 500GB disk and the 1TB disk, and you will see a difference.
Are you sure that the PC containing the 500GB drive is "innocent"? If you want to prove that the problem is inside that 500GB drive, then attach your "good" 1TB disk in the same PC, after removing the 500GB drive. Use exactly the same SATA cable and controller where the 500GB drive is installed when you see the slow speed, and again run the error scan and benchmark graphs. I expect they will be normal with the 1TB drive - because I think that is what you are reporting from your testing.
There is also extra evidence of the 500GB drive having a problem, although it is just a small piece of evidence - the SMART 0xBC attribute is not zero. That shows that the drive took a very long time to manage to read a sector at some point in the past. Again, this fits with the drive having a marginal internal fault.
Of course there is other testing you can do e.g. moving the 500GB drive to another PC where you are confident that the HD Tune Pro graphs look normal for another drive - and then install the 500GB drive into that other PC, instead of its drive. Does the slow transfer rate, and unusual benchmark graph shape, move with the 500GB drive to another PC?
It is your choice what tests you want to do. Since the SMART data is not showing an obvious fault, it sometimes needs careful testing by you to be really sure that there is a marginal fault. I have seen many examples of slow disk drives, and in most cases, there was little evidence in the SMART data, until the drive became even more "sick"