iMac 2011 HDD noise Hitechi
I have imac 21.5'' SSD 256 + 2 Tb Hitachi HDD. Hitachi HDD is for sure NOISY!! I mean not the access noise itself, but humming from the drive rotation. I am not sure whether the drive is normal, I am planning to visit Apple service.. But I hear a hi-pitched noise any time the drive is ON. The sound is not strong but for sure I can hear it very very well in a perfectly quiet room. It reminds a fan noise. Bt it's a drive for sure, the sound stops when I unmount it. I never was able to hear my fans even in games, for sure. You won't hear that sound in a noisy room though. But I am not happy with this sound at all.