28.04.2009 22:05 Uhr, Quelle: MacFixIt

Hard-drive noises

Whenever mechanical hard drives are accessed, various noises will be heard, including clicking, whirring, and the occasional "grinding," which is just a series of subtle click sounds close together. These sounds happen because the drive platters are spinning up, and the head is being swiftly moved from position to position on the drive and then seated back in a secure location. As such, if the drive is spun down and you access it, you may hear something like a whirr (platter spinning up) followed by a click (heads unseating) and a subtle grinding noise (heads navigating rapidly), then another click (heads seating). Depending on the applications used, drives may make different levels of these sounds.

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