kernel boot procedure

[Vladimir Murzin]

Hi

On Mon, Mar 5, 2012 at 3:58 PM, beyond.hack <beyond.hack at gmail.com> wrote:
> @Vladimir Murzin--thnx. for the link..really interesting it is..
>
> @Santosh sir,
>
> Quoting from:
> http://www.ibm.com/developerworks/linux/library/l-initrd/index.html
>
> The initial RAM disk (initrd) is an initial root file system that is mounted
> prior to when the real root file system is available. The initrd is bound to
> the kernel and loaded as part of the kernel boot procedure. The kernel then
> mounts this initrd as part of the two-stage boot process to load the modules
> to make the real file systems available and get at the real root file
> system.
>
>
> We were just at
> BIOS->MBR->bootloader at MBR(GRUB/LILO)-....
>
> 1.does GRUB/LILO understand/see the  filesystems????
> --so that it mounts the initrd image or the kernel image bcz. they both are
> in /boot(harddisk filesystems)
> 2.does the kernel mounts initrd as root filesystem???  or the bootloader
> does this task??
>
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1. Yes, they understand filesystems. They provide their own (may be
simplified) support for access to filesystem.
2. Yes, kernel mounts rootfs from initrd as a root mount point, later
it overwrote with actual root file system