How do I install Grub into the Partition Boot Record (PBR)?

sirbender · 01-06-2009, 09:34 PM

I installed Ubuntu and allowed Grub to write itself into the MBR. Now I want to install Grub into the PBR of my Ubuntu Partition. After that I will write my own install of Grub from another partition into the MBR which will allow calling the PBR of my Ubuntu partition and eventually boot Ubuntu.

I know how to do step two. What I do not know is how install Grub into the Partition Boot Record (PBR)?

Cheers,
sb

syg00 · 01-06-2009, 10:11 PM

Try this from a Ubuntu terminal

Code:

sudo grub
find /boot/grub/stage1 <<<=== try /grub/stage1 if you get "File not found"
 .... take note of what it returns - maybe (hd0,1)
root <enter_what_was_returned>   e.g. root (hd0,1)
setup <enter_what_was_returned>   e.g. setup (hd0,1)
quit

Uncle_Theodore · 01-06-2009, 10:22 PM

I believe it's called the superblock, not PBR. Never mind, you just need to give the proper location to the "grub-install" command or, if you're using the live DVD, the "setup" command. For example,

grub-install /dev/hda1
grub-install '(hda0,0)'
or
setup (hd0,0)

will install grub in the superblock of the first partition.

pixellany · 01-06-2009, 11:04 PM

I thought the "superblock" was associated with filesystems??

Regardless---boot code can go in the MBR (first sector of the drive) or the *** (first sector of a partition)

In the GRUB shell:

setup (hd0) puts GRUB in the first sector (MBR) of the #1 drive

setup (hd0,0) puts GRUB in the first sector of Drive 1, partition 1.