This will set the hibernation file to 60% of 8 GB of RAM, meaning only 4.8 GB. Then simply use this command: powercfg hibernate size 60 Where NN is the desired hiberfile.sys size in percentage of the total memory.įor example, if you have 8 GB of RAM installed and you want to set the hibernation file size to 60% to save disk space. Type the following command: powercfg hibernate size NN.This is a fantastic improvement Microsoft has made in Windows 7 and later, but it's turned off by default. It can take significantly less disk space, even 50% of your installed RAM capacity.
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This means that the C:\hiberfil.sys file does not take as much disk space as your RAM capacity. To solve the problem of increasing RAM capacities, Microsoft added the ability to compress the hibernation file in Windows 7. If you disable hibernation, you lose the benefits of fast boot. Also, features like Fast Startup in modern versions of Windows such as Windows 8/8.1 depend on hibernation being enabled to boot the OS faster.
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#HOW TO FREE SPACE ON HARD DRIVE HYBERNATE PC#
Because memory capacities on modern PCs are always increasing, the hibernation file takes up considerable disk space.Īlthough you can disable hibernation and use sleep state or always keep your PC powered, it's not an energy-efficient way for mobile PCs. When you resume from hibernation, Windows reads this file again and transfers its contents back to memory.
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This hiberfil.sys stores the contents of memory (RAM) when you hibernate your PC. When hibernation is enabled in Windows, the OS creates a file called hiberfil.sys in the root of your C: Drive.