Hibernate mode overrides the settings of the BIOS boot

I put my Home Premium 64 k of win7 Hibernate version and inserted a bootable CD in the drive. To restart, I expected the boot CD. But what happened is that the machine is out of hibernation in Windows - just what I wanted to happen.

I thought that hibernation has written information in the system of Windows startup saying restore the system running from the hibernation file, that would happen after the start of the C: drive. The BIOS is set to give the priority of CD player on the hard drive and it works very well after a shut down Windows. So how the hell manages it to wake up from hibernation? And how can I stop it?

I know not what you ask.
Hibernate and wake-up process is part of the ACPI specification and uses the S4 power state.  I know that when the machine is re-fueled the BIOS performs the normal boot process, but exactly how he 'knows' is an interesting question.  I don't know if a flag is set in the CMOS when the S4 state is applied or it checks the hard disk of the existence of hiberfil.sys and the flags of the State has put out there.

It could be explained here-
ADVANCED CONFIGURATION AND POWER INTERFACE SPECIFICATION
http://www.ACPI.info/spec.htm

Tags: Windows

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