I have two Western Digital drives attached to my iMac. One for TimeMachine backup and one for Carbon Copy Cloner backup. Both drives are 2.5 inch in WD's "black" model. Each is in an enclosure - one laying on my desktop near the iMac stand and the other velcroed to the back of the iMac stand. Both within 3 feet of my ears and with no acoustic isolation on insulation.
I have a quiet office and have never heard any sound at all from either. The TimeMachine backup happens every few minutes and the CCC three times a week. The only way to see if the drives are active is to look at the light on the enclosure. Absolutely no audible noise.
I have a quiet office and have never heard any sound at all from either. The TimeMachine backup happens every few minutes and the CCC three times a week. The only way to see if the drives are active is to look at the light on the enclosure. Absolutely no audible noise.