noisy Hitachi 2 Tb HDD iMac 2011
I have 21.5'' iMac 2011 256 SSD + 2 Tb Hitachi HDD. That 2 Tb Hitachi HDD is the only source of noise in this model. And for sure this noise is well recognisable in a silent room. The read/write sounds are fine and probably better than some other drives, my problem is a constant rotational hum of this drive, which is for sure I can hear pretty well in a quiet room. People with 2 Tb HDD without SSD for sure are thinking it's a fan noise, but not. Fans in iMac 2011 are so quiet you won't hear them at all , even in a perfectly quiet room. So this 2 Tb Hitachi drive for sure has a noticeable constant rotational hum, which reminds a fan noise. But it's a drive noise. And this is the only thing I don't like in this model. I never had rotational persistent noises in my older iMacs. If somebody uses iMac 2011 in a perfectly quiet room with Hitachi 2 Tb HDD, they are welcome to comment whether they have any noise. Maybe my drive shouldn't be that noisy. Apple service does not bother, if a drive is working without errors - they don't bother. Very sad.