Windows Internals 5th edition p. 583 states that with hybrid sleep there is only written an emergeny hibernation file. I noticed a significant longer time for waking up when power was gone in hybrid sleep mode compared to waking up from normal hibernation mode. I cite p. 583 [quote] On systems with hybrid sleep enabled (by default, only desktop computers), a user request to put the computer to sleep will actually be a combination of both the S3 state and the S4 state: while the computer is put to sleep, an emergency hibernation file will also be written to disk. Unlike typical hibernation files, which contain almost all active memory, the emergency hibernation file includes only data that could not be paged in at a later time, making the suspend operation faster than a typical hibernation (because less data is written to disk). [/quote] So what data can be left out when writing this emergeny hibernation file? Thanks for your help.

Hi, I would like to share the following information with you. Hibernation is a power-saving state designed primarily for laptops. 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, and then turns off your computer. Of all the power-saving states in Windows, hibernation uses the least amount of power. On a laptop, use hibernation when you know that you won't use your laptop for an extended period and won't have an opportunity to charge the battery during that time. Hybrid sleep is designed primarily for desktop computers. Hybrid sleep is a combination of sleep and hibernate—it puts any open documents and programs in memory and on your hard disk, and then puts your computer into a low-power state so that you can quickly resume your work. That way, if a power failure occurs, Windows can restore your work from your hard disk. When hybrid sleep is turned on, putting your computer into sleep automatically puts your computer into hybrid sleep. Hybrid sleep is typically turned on by default on desktop computers. This information will help you have a better understanding of the Hybrid Sleep Function.

Thanks for your answer, but I already knew this. In hybrid sleep there is saved less data in the hibernation file and I want to know which data is left out.