Hi, I have Seagate st3000dm001, out of the sudden it start making strange noise,
Here is recording:
http://youtu.be/gdoRq7DJ5bk
After that I disconnected it from the machine, I don't know how long that take because I was not next to machine all the time.

Now, I dont want to try to connect it as I heard it can damage it more, although I dont know is that true?
What is the problem, is there anything I can do by myself?
I have another disk exactly the same model, if it is electronics I could swap but I doubt it is problem with electronics...?

The disk was in desktop machine all the time, it never experienced any mechanical damage.
There was power outage two days ago, but after that it worked and didn't show any bad signs, could it be it was damaged because of power outage ?

Is this manual correct?
https://www.youtube.com/watch?v=F5Y7BniaRXg

Can you tell from the recording I linked are disk plates scratched, damaged?
Could swap of electronic board make anything?

No, this video is for a completely different drive issue. It is quite likely that the damage internally is fatal, but if your data is of any value, you had better have it assessed by a data recovery professional who will do a complete diagnosis which will likely include a visual inspection inside the hard drive in a dust free environment.

_________________
Luke
Recovery Force Data Recovery

+1

Probably bad heads.

_________________
Data Medics - Hard Drive, SSD, and RAID Data Recovery Service Company

Thanks for response
What is the cause of this? I never moved disk, it stayed inside the case all the time.
Could the power outage damage HDD? it worked two days after the outage happened....
Can you identify that sound in my video, is that sound of head scratching, or motor or something else...?

Heads may fail for diferent causes. Maybe bad media, maybe bad quality of materials, maybe operating temperature, humidity, ....