I was just wondering what's different about Ubuntu that makes my HDD work more silently than in Windows. In Windows my hard disk makes a very audible high-pitch noise (no vibrations), but in Ubuntu it just works perfectly, absolutely no noise. It's all the same whether I'm running Windows 7 or Windows 8, or Ubuntu 12.04 to 13.04!

  • In Ubuntu it doesn't matter if my hard disk is active or idle, but in Windows, it makes the noise only when it's idle! – Amir Hz Apr 28 '13 at 1:02

It is probably set to spin-down when the system is idle

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