Mikhail-81 wrote:
Vulcan wrote:
If that is a good summary of the situation, then an intermittent power-related problem (which did not happen when the Seagate drive was attached, perhaps because the problem was intermittent - i.e. this was just good luck?) still seems a possibility. Perhaps you have more details which you have not yet given, to help to confirm or disprove that possibility?
No - When I've first heard the clicking, I bought a Seagate, and make a backup, since I have it as a reserve drive.
Unfortunately that is still not detailed enough for me to understand exactly what happened and when - i.e. the full sequence of events (problems observed, tests performed, results of those tests, changes to the configuration etc). Without that clear understanding, then diagnosis will be too slow, inefficient and prone to errors.

Personally I still do not see where an intermittent power-related problem has been eliminated as a possibility...
Mikhail-81 wrote:
But why the SMART is OK?
SMART does not, and never can, predict/show
all problems. For example, if a drive cannot even start up successfully, then it also cannot update the SMART attributes (they are stored on the platters). Therefore you can
never look at SMART data and say "the drive is definitely OK" - that is logical fallacy. All you can say is that the SMART data shows no obvious signs of a problem - which does
not mean that the drive is definitely OK! This is a common misunderstanding. I hope that explanation helps you to better understand the limitations of the SMART attribute data.