HGST UltraStar seek error issue

[sTERNKERN]

Hi All!

I would like to ask for your expertise / advice. I have a HGST Ultrastar 7K6000 (4TB) hard disk drive. It has been serving me quite well, but recently I had some issues with it.
It generated a weird, constant "activity" sound. A couple of times it even froze my windows, I had to restart the PC. The UI was still working, but it was in a deadlock, I could not do anything.
HDD Sentinel told me the drive was in perfect shape (100/100), but after a while my Windows told me a drive failure was imminent.
I got another drive and managed to save whatever was worthy to be saved from the dying drive, but then something happened. The drive started to operate perfectly and it still is in a perfect condition.

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It looks like the seek error rate went up to 7m for a bit then fell back to 0.
My question, what should I do with this drive? Is it really dying? Should I or should I not use it?
Thanks for the responses in advance, they are much appreciated!

[pepe]

your options include running a long smart test and a write-verify test, they should show if it is ok or not. Use it for non-critical data only. (if such term exists , since you have all your critical data backed up, DON'T YOU? So none of it is stored as critical...)

pepe