Booting the Windows NT System

POWER ON SELF - TEST (POST)                                    

Planning , Designing & Implementing Computer's Network 

Power on self test or post is a set of instructions stored in the rom that checks each functional area of the computer. These instructions from a part of the ROM- BIOS. The POST checks RAM , Test the Connections to the various hardware devices like the keyboard, VDU and disk drive and reports problem encounted.

  
The next stage is bootstrap process.

BOOTSTRAP PROCESS

The name of the process originates from an American expression, Pull yourself up by your boot straps which means, prepare yourself. During this process, the OS is loaded into RAM. Familiarity with the boot process help in understanding the OS better..

                           The Bootstrap process comprises two sequences.

1) Preboot Sequence

2) Actual Boot Sequence

PREBOOT SEQUENCE

The bootstrap process consist of loading the components of the OS into internal memory (RAM), of the computer. These Components are ____________

A) Kernel: Kernel is a program that act as an interface layer between the user and the hardware components. The kernel abstracts, or hides, the hardware details from the User.

B) Device Drivers: are program that operate various devices attached to the computer.  For Example , the disk drive and the mouse have their own device drivers.

Actual Boot Sequence: 

The Actual Boot Sequence succeeds the preboot sequence. The sequence gathers information about hardware and drivers in preparation for the WINNT load phases. Windows NT requires certain files in orders to boot. They are _____________

               1) NTLDR ->  loads the O.S. (Operating System)

               2) BOOT.INI -> Builds the O.S. Selection menu that is displayed during the
                                           Booting Process.

               3) NTDETECT.COM -> Examines the hardware available and builds a hardware  
                                                   list……………………..

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