Hard drives start to degrade the minute that you start using them. SMART enabled in the bios is just for HD on the verge of death. There are SMART tools that will give more details. Depends on how robust the software is if it logs,reports alerts to you of what it finds. Same with backup software. I agree if you are backing up errors over good data then yeah that's a problem. What type of backup solution are you using hardware and software? It's best to have atleast 2 or 3 images on seperate drives and one tucked away. A bad sector that holds system data gets corrupt yeah your system is going to run wonky. Only thing you can do is try to repair the sector. Some cases you can't and those sectors data cannot be moved and you have to completely reformat the drive and put the image back on it. Usually any sign of errors people will junk them and get a new one. It's just the nature of the beast HD's and SSD die eventually.
Edit: If this a continuing thing, heat inside a system can contribute to HD's failing a lot. I would say keeping them in the 40's range is ideal. Also moisture high humidity or very cold rooms can cause moisture and hd failures. Living near the coastline. Sea air increases electronic failure.
Edited by technonymous, 22 October 2015 - 07:51 AM.