I don't know whether this has been shared by other users or not, but just in case.
So, i have experienced some noise from the imac, some weird sond like someone is knocking the case inside my imac, and it happens once in a few minutes. The 1st thing comes to my mind is the HDD, so i check the forum about the issue, and yes they are many people experienced this problem.
At first, I tried to investigate what is triggering the sound, is it random or is it due to the HDD being stress by spotlight or other stuff. But i found out that it only happen when my system is under minimal usage, ie surfing net, or writing in Xcode.
My conclusion comes to when the HDD is not being used, it will trigger that sound, and I think it may due to the HDD is going into sleep mode which trigger the sound.
I ran an experiment by opening my utorrent and let it start downloading and stress the HDD continuously, surprisingly i did not hear the noise anymore, not until i exit my utorrent.
So, I think the sound is actually produce by the HDD when it is going into sleep mode to save power when not being used. The option to solve the problem is either let your HDD run continuously to prevent it from sleeping, or just ignore the sound.
I am sure there is some kind of technique that can turn the HDD power save mode off, if anyone did find it, do kindly post here
So, i have experienced some noise from the imac, some weird sond like someone is knocking the case inside my imac, and it happens once in a few minutes. The 1st thing comes to my mind is the HDD, so i check the forum about the issue, and yes they are many people experienced this problem.
At first, I tried to investigate what is triggering the sound, is it random or is it due to the HDD being stress by spotlight or other stuff. But i found out that it only happen when my system is under minimal usage, ie surfing net, or writing in Xcode.
My conclusion comes to when the HDD is not being used, it will trigger that sound, and I think it may due to the HDD is going into sleep mode which trigger the sound.
I ran an experiment by opening my utorrent and let it start downloading and stress the HDD continuously, surprisingly i did not hear the noise anymore, not until i exit my utorrent.
So, I think the sound is actually produce by the HDD when it is going into sleep mode to save power when not being used. The option to solve the problem is either let your HDD run continuously to prevent it from sleeping, or just ignore the sound.
I am sure there is some kind of technique that can turn the HDD power save mode off, if anyone did find it, do kindly post here