hibernate – Windows Blog by Brink

hibernate

Specify Hibernation File Type as Full or Reduced in Windows 11

Hibernation files are used for hybrid sleep, fast startup, and standard hibernation (described earlier). There are two types, differentiated by size, a full and reduced size hibernation file. Only fast startup can use a reduced hibernation file.

Hibernation file type hiberfil.sys default size Supports
Full 40% of physical memory hibernate, hybrid sleep, fast startup
Reduced 20% of physical memory fast startup

Hibernate¬†is a power-saving S4 state designed primarily for laptops, and might not be available for all PCs (PCs with InstantGo don’t have the hibernate option). While sleep puts your work and settings in memory and draws a small amount of power, hibernation puts your full current state (ex: open documents and programs) on your hard disk to the hiberfile (C:\hiberfil.sys), and then turns off your computer. Hibernate uses less power than sleep and when you start up the PC again, you‚Äôre back to where you left off (though not as fast as sleep). Use hibernation when you know that you won’t use your laptop or tablet for an extended period and won’t have an opportunity to charge the battery during that time.

Hybrid sleep¬†is a special state that’s a combination of the S1-S3 sleep and S4 hibernation states, it’s when a system uses a hibernation file with S1-S3. It’s only available on some systems. When enabled, the system writes a hibernation file but enters a higher-powered sleep state. If power is lost while the system is sleeping, the system wakes from hibernation, which takes longer but restores the user’s system state.

Fast startup (aka: hiberboot, hybrid boot, or hybrid shutdown) is turned on by default in Windows and is a setting that helps your PC start up faster after shutdown. Even faster than hibernate. Windows does this by saving an image of the Windows kernel and loaded drivers to the hiberfile (C:\hiberfil.sys) upon shutdown so when you start your PC again, Windows simply loads the hiberfile (C:\hiberfil.sys) into memory to resume your PC instead of restarting it.

Fast startup requires that hibernate be enabled. If you only want to use fast startup and don’t plan on using hibernate, then you can¬†specify the hiberfile type as reduced¬†to significantly reduce the size of the hiberfile (C:\hiberfil.sys) to about half of its full size.

Hiberfile type:

Full = Supports being able to enable hibernate and turn on fast startup (hiberboot). The hiberfile (C:\hiberfil.sys) will be 40% of physical RAM installed on your computer. Hibernate is available to be added to the power menu.

Reduced = Only supports being able to turn on fast startup (hiberboot) without hibernate. The hiberfile (C:\hiberfil.sys) will be 20% of physical RAM installed on your computer. Removes hibernate from the power menu.

This tutorial will show you how to specify the hibernation file (hiberfile.sys) type to be reduced or full in Windows 10 and Windows 11.

Read more…

Enable or Disable Hibernate in Windows 11

Hibernate¬†is a power-saving state designed primarily for laptops, and might not be available for all PCs. While sleep puts your work and settings in memory and draws a small amount of power, hibernation puts your open documents and programs on your hard disk to the hiberfile (C:\hiberfil.sys), and then turns off your computer. Hibernate uses less power than sleep and when you start up the PC again, you‚Äôre back to where you left off (though not as fast as sleep). Use hibernation when you know that you won’t use your laptop or tablet for an extended period and won’t have an opportunity to charge the battery during that time.

  • PCs with¬†Modern Standby¬†do not have hibernate available.
  • By default, the¬†size¬†of the¬†hidden protected OS¬†“C:\hiberfil.sys” file is¬†75%¬†of the total amount of RAM installed on your computer.
  • If you disable hibernate,¬†fast startup¬†will also get disabled.
  • If you disable hibernate, hibernate will no longer show in the¬†Power¬†menu.

Fast startup¬†requires that hibernate be enabled. If you only want to use fast startup and don’t plan on using hibernate, then you can¬†specify the hiberfile type as reduced¬†to significantly reduce the size of the hiberfile (C:\hiberfil.sys) to about half of its full size.

If you want to use hibernate, then be sure to specify the hiberfile type as full.

This tutorial will show you how to enable or disable hibernate and restore or delete the hiberfil.sys file in Windows 11.

Read more…

Turn On or Off Fast Startup in Windows 11

There are three startup modes in Windows:

  • Cold (traditional)
  • Wake-from-hibernation
  • Fast

Starting with Windows 8.x, the default shutdown and restart scenario has been updated and named fast startup. Fast startup begins with the shutdown process and includes writing data to disk similar to the hibernate process. A key difference is that all user sessions (Session 1) are logged off and the remaining information is written to the hiberfile (C:\hiberfil.sys). When you boot the PC from this state, Windows loads the previously initialized state by reading from the hiberfile, instead of running the full cold boot process in which Windows, drivers, devices, and services are initialized. This method speeds up the process of initializing the lock or Start screen.

In addition, the use of hibernate technology has been expanded to create a new default startup and shutdown experience that is much faster than a full boot.

The faster startup and shutdown sequence uses the hibernate infrastructure to place the PC in hibernate. Unlike a full shutdown and boot, the user session is closed and a hibernate is performed. As a result, the hibernate file is much smaller, ensuring that the hibernate and resume process is faster. This sequence also takes advantage of the parallelization optimizations.

This tutorial will show you how to turn on or off fast startup in Windows 11.

Read more…