I have 4 x 2TB Seagate drives with bad sectors that say otherwise
“I have 4 x 2TB Seagate drives with bad sectors that say otherwise.”
Bad sectors are usually caused by the stylii ‘skipping’ over the discs. My guess would be that you have other issues that are causing the ‘skipping’. ‘Skipping’, again, can be caused by trying to access different parts of the disc too fast or perhaps they needed to be defragged. If files on the drive are separated on the discs then that could cause the ‘skipping’ effect.
The fact that you have four drives like that makes me suspect ‘skipping’ or otherwise misuse of the drive either by the person sitting at the keyboard or other software issues.