In the beginning, I had disk A and B. Disk A died. I bought disk C. Disk C turned out to be faulty. I asked for a return and for the same time I installed a small Gentoo Linux installation in my SSD. Then Disk D came as a replacement for disk C. I installed another system on Disk D and copied the backup from Disk C. Then I discovered that Disk C has bad sectors as well.
I will write about the messy situation later, but apparently it is time for me to place an order for a new drive E, as well as a new power supply unit as the current one might be the cause.
At least, they say bad things come in three, right?