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Re: help to understand grub steps

From: myfreneticvisions-grub
Subject: Re: help to understand grub steps
Date: Thu, 11 Oct 2007 09:25:33 +0200 (CEST)

hi Pàdraig!
tnx for your answer! your link it's very useful!
but now i have other questions:
why does bios need to load first stage 1 in the mbr?can't it load directly stage 1.5 since it knows where is the boot filesystems?

Pádraig Brady <address@hidden> ha scritto:
address@hidden wrote:
> hello everyone!
> i have a few questions about grub steps!
> i know that when i start the pc:
> 1-the cpu loads the bios
> 2-bios controls that every component is functional and loads the stage 1
> that is stored in the MBR
> 3-stage 1 loads the stage 2 that is stored somewhere in the hd
> 4-stage 2 show to the user the Operating systems available and let the
> user select the one he wants, then it loads Kernel, initrd and other
> stuf related to the OS selected.
> these steps are right?
> i know that exists also a stage 1.5 placed after the bios step
> 2-bios loads stage 1.5 when the stage 1 stored in MBR is not available
> (why not?), stage 1.5 is located exactly after the MBR and once loaded
> it reads and load the stage 2 and so on...
> is it right?

This might help:


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