@Ramhound manufactures' SMART are not opensource, there are cases that SMART can't detect badblocks (superuser.com/questions/462233/…). TestDisk is for data recovery not for detecting badblocks.

I want good methods to detect them that's it.

BTW, people write badblock checking softwares and there are many. All these people are facing not true problems?

I honestly face true problems with real drives with badblocks. If anyone did not face badblocks drive problems, just ignore my question. But anyway badblocks are there. Why posting opinions trying to persuade me ignore true problems?