Grub Install on existing Partitioned Harddrive

[William Estrada]

Sebastian,

  If you already have Grub installed then you don't need to reinstall it
again. Just update your grub.conf or menu.list. The update should point 
to your external disk.

This may help you: http://64.124.13.3/hacks/USB_Boot_using_GRUB.html
There are some other links at the bottom of the page.

> Message: 10
> Date: Sun, 20 Jan 2008 11:28:30 +0000
> From: "Sebastian H. Schmidt" <sebastian.h.schmidt at gmx.de>
> Subject: Grub Install on existing Partitioned Harddrive
> To: fedora-list at redhat.com
> Message-ID: <4793305E.8050902 at gmx.de>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> Hello,
>
> I want to install FC 8 on my Macbook Pro (SantaRosa) which is already 
> partitioned, and i`m not able to change it. Currently the existing 
> Partition Table Looks like this
>
> [EFI][MAC-OS]{Free128MB}[MAC-Data]{Free128MB}[WINXP]
>
> Since there is not enough space left on the harddrive i have to install 
> the Linux on a external drive, but thx to Apple it could not boot 
> completely  from my external HD, so i had to put my /boot partition in 
> one of the Free 128 MB blocks. .. and thats where it gets messy.
> Since this new Partition is not one of the first Four FC6/CentOS are 
> telling me that this installation is not possible. So 2 Weeks ago i 
> installed Ubuntu and it worked fine, i think because it installed the 
> GRUB bootloader into the MBR of the Windows Partition (because it 
> appears when i wanted to start it).
> Now i have to install  FC8x64 and doing that  from the Live CD It 
> creates all the directories and necessary  filemounts, but it seems that 
> it installed the bootloader somwhere it does not get recognised. And now 
> to the question, how do i install the the bootloader into the MBR of the 
> Windowspartition but refering to the grub files in the /boot partition. 
> Is this possible, does this might work ? ... if so .. how.
> I had a look at the grub installation page but it is not clear for me 
> how this might work without crashing the whole machine.
>
>
> grub-install --root-directory=/boot /dev/hda
>
> does [--root-directory=/boot] means "you find your grub data in /boot" ?
> does [/dev/hda] means "install the bootloader to /dev/hda" ?
> does it might work if i use
> grub-install --root-directory=/boot /dev/sda4 ?
> because the windows partition is sda4 and i want the bootloader 
> installed there ?
>
>
> thx very,very much for your help.
>
>
> Sebastian

-- 
William Estrada
MrUmunhum at popdial.com
Mt-Umunhum-Wireless.net ( http://Mt-Umunhum-Wireless.net )
Ymessenger: MrUmunhum