iMac 27(2010) problem(Please help)

[a1essio]

Hello.
I have a problem with my iMac.
It was working well for a 2 years, and suddenly, after reloading it went into recovery mod and it didn’t help, just reloading and then again recovery. I went into disk utility and my Volume with 1tb was unmounted. So there were no ideas and I decided to format and reinstall Os (from disk with snowLeo and then to Mavericks). It started working for 2 weeks and then recovery starts again. I went to the Apple service because I heard about program with 1tb Seagate drivers. They checked it with their tools and said that hardware is ok and they didn’t know how to help me. Can you help me?

 

[Consultant]

Make an appointment when your problem happen and show them the problem.

Otherwise you are just some person claiming something happened but has no proof.

 

[a1essio]

I showed them a problem, they agreed that something wrong, but all tests with hard drive, video and RAM were ok.