I know you are upset with the problems of your disk. People here are trying to help you with your problem without getting anything from you. There is no need to emphasis your point if they have overlook your posting. It does not look polite.
I have got a clean room. I can do head exchange. But I do not think I willl help you nor give you any advice in case i missed your point, which I note that you want to know "how to repair a hard disk".
I apologise for my blunt manner of reply. Clearly one should consider the feelings of the recipient before typing any reply. For example, if said recipient is already fairly irritated from a night of troubleshooting a faulty hard disk, perhaps one should refrain from giving any less-than-helpful suggestions.
Nonetheless, do note that I have refrained from using any profanity or pejorative epithets in addressing your friend (I am not sure how many others can claim likewise). While not entirely polite, perhaps rudeness might not be the word to use here.
You say that you understand that I am upset. Then you will understand the reason I replied as such. Here is a short story I am sure many can relate to -
Not too long ago, I called up Singtel about a technical problem my friend had. Speaking to the so-called helpdesk, I took the trouble to slowly explain, verbatim, what I had already attempted (basically what is already in their standard list of suggestions). Unfortunately, to my detriment, the helpdesk personnel suggested to me the very same things I had just told him. I can say here that I was much ruder to the helpdesk personnel than I was to your friend.
I have encountered the same situation with Starhub, Linksys, and Asus personnel, among others. So you might understand that my indignation towards such treatment has been built up over a lifetime. I have tried being polite to these helpdesk personnel, but they do not reciprocate.
You may think that there is no reason to be annoyed even when faced with such "treatment". But then, humans are creatures of emotion. Can you honestly say that you have never lost your temper unnecessarily in ur entire lifetime?
There are perhaps certain situations when you may be entirely worked up but I would be calm. To judge all humans on a common emotional baseline is perhaps a little bigoted.
But I am sure you understand that already
I have done a search on you. Clearly you know what you are taking about, and you do provide genuine help. Unfortunately that clearly isn't the case for most others in this forum. If one has to suffer their advice to benefit from yours, so be it.