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Problems with setiing up dual boot between UBUNTU AND WINDOWS

since a few days i ve trying to setup dual boot between UBUNTU 11.10 and WINDOWS 7. i ve tried many things one of which is as following from a live cd

Code:

root (hd0,0)

setup (hd0)

exit

in this when i execute second line in grub prompt i get

Code:

cannot setup mentioned partition

in another one i.e.

Code:

sudo mount /dev/sda1 /boot

sudo apt-get update && sudo apt-get install grub-pc

sudo grub-setup /dev/sda

sudo umount /boot

here in second line i get

Code:

grub-setup: error: cannot stat /boot/grub/

my windows partion is /dev/sda1 and ubuntu partion is /dev/sda8
i first installed ubuntu and then windows....
i ve not used dual boot before so i am new to it and so expect an answer in detail....
THNX...:)

Hi

As you have just installed the OS,s it might make it easier to reinstall loading windows 1st then Ubuntu. That way grub sorts out the problem of loading both systems.

Quote:

Originally Posted by Aagam (Post 4561654)

in another one i.e.

Code:

sudo mount /dev/sda1 /boot

sudo apt-get update && sudo apt-get install grub-pc

sudo grub-setup /dev/sda

sudo umount /boot

here in second line i get

Code:

grub-setup: error: cannot stat /boot/grub/

Your mount is making everything wrong. You are mounting /dev/sda1 in boot, which places the full sda1 filesystem in /boot, and so grub can't find it. (you effectively have /boot/boot/grub when grub expects to find /boot/grub).

I assume that you are doing this all from a live CD and that Ubuntu is on /dev/sda1, so try:

Code:

sudo mount /dev/sda1 /mnt

sudo grub-install --boot-directory=/mnt/boot /dev/sda

Quote:

Originally Posted by Roken (Post 4561666)

I assume that you are doing this all from a live CD and that Ubuntu is on /dev/sda1, so try:

Code:

sudo mount /dev/sda1 /mnt

sudo grub-install --boot-directory=/mnt/boot /dev/sda

Yet, the OP states in the first post that windows is on sda1 and ubuntu is on sda8

Quote:

Originally Posted by Aagam (Post 4561654)

my windows partion is /dev/sda1 and ubuntu partion is /dev/sda8

EDIT: just follow the ubuntu docs and you should bo OK.

https://help.ubuntu.com/community/Re...tallingWindows

Ahh, I missed that. OK, small revision:

Code:

sudo mount /dev/sda8 /mnt

sudo grub-install --boot-directory=/mnt/boot /dev/sda

Quote:

As you have just installed the OS,s it might make it easier to reinstall loading windows 1st then Ubuntu. That way grub sorts out the problem of loading both systems.

i agree...but its not that. I have used ubuntu for much of the time earlier and have some imoportant things on it...however thnx

Quote:

sudo mount /dev/sda8 /mnt
sudo grub-install --boot-directory=/mnt/boot /dev/sda

i did that.....but now only ubuntu boots....i want both...plz tell me how to get that.

Boot Ubuntu as normal then run

Code:

sudo update-grub

It should find Windows and add it to the boot menu.

try

Code:

sudo update-grub

i used this

Code:

sudo update-grub

and i get the following

Code:

Searching for GRUB installation directory ... found: /boot/grub

Searching for default file ... found: /boot/grub/default

Testing for an existing GRUB menu.lst file ... found: /boot/grub/menu.lst

Searching for splash image ... none found, skipping ...

Found kernel: /boot/vmlinuz-3.0.0-13-generic

Found kernel: /boot/vmlinuz-3.0.0-12-generic

Found GRUB 2: /boot/grub/core.img

Found kernel: /boot/memtest86+.bin

Updating /boot/grub/menu.lst ... done

windows is not being listed here...

OK.. Can you try adding the entries manually in GRUB Configuration file and see if you can booth the Windows?

Quote:

title Windows
rootnoverify (hd0,0)
chainloader +1

Code:

title Windows

rootnoverify (hd0,0)

chainloader +1

i tried that but then too ubuntu boots directly....BTW this is my menu.lst file...maybe, i can help..

Code:

### BEGIN AUTOMAGIC KERNELS LIST

## lines between the AUTOMAGIC KERNELS LIST markers will be modified

## by the debian update-grub script except for the default options below



## DO NOT UNCOMMENT THEM, Just edit them to your needs



## ## Start Default Options ##

## default kernel options

## default kernel options for automagic boot options

## If you want special options for specific kernels use kopt_x_y_z

## where x.y.z is kernel version. Minor versions can be omitted.

## e.g. kopt=root=/dev/hda1 ro

##      kopt_2_6_8=root=/dev/hdc1 ro

##      kopt_2_6_8_2_686=root=/dev/hdc2 ro

# kopt=root=UUID=9ed5964e-61ff-4785-a755-bd2d60483b87 ro



## default grub root device

## e.g. groot=(hd0,0)

# groot=9ed5964e-61ff-4785-a755-bd2d60483b87



## should update-grub create alternative automagic boot options

## e.g. alternative=true

##      alternative=false

# alternative=true



## should update-grub lock alternative automagic boot options

## e.g. lockalternative=true

##      lockalternative=false

# lockalternative=false



## additional options to use with the default boot option, but not with the

## alternatives

## e.g. defoptions=vga=791 resume=/dev/hda5

# defoptions=quiet splash



## should update-grub lock old automagic boot options

## e.g. lockold=false

##      lockold=true

# lockold=false



## Xen hypervisor options to use with the default Xen boot option

# xenhopt=



## Xen Linux kernel options to use with the default Xen boot option

# xenkopt=console=tty0



## altoption boot targets option

## multiple altoptions lines are allowed

## e.g. altoptions=(extra menu suffix) extra boot options

##      altoptions=(recovery) single

# altoptions=(recovery mode) single



## controls how many kernels should be put into the menu.lst

## only counts the first occurence of a kernel, not the

## alternative kernel options

## e.g. howmany=all

##      howmany=7

# howmany=all



## specify if running in Xen domU or have grub detect automatically

## update-grub will ignore non-xen kernels when running in domU and vice versa

## e.g. indomU=detect

##      indomU=true

##      indomU=false

# indomU=detect



## should update-grub create memtest86 boot option

## e.g. memtest86=true

##      memtest86=false

# memtest86=true



## should update-grub adjust the value of the default booted system

## can be true or false

# updatedefaultentry=false



## should update-grub add savedefault to the default options

## can be true or false

# savedefault=false



title Windows

rootnoverify (hd0,0)

chainloader +1

Are you using grub legacy or grub 2? (grub 2 version is 1.99)

i think i was using grub
which uses "menu.lst"
but now i upgraded to grub2 and using grub.cfg i got dual boot
i did

Code:

sudo apt-get install grub2

sudo update-grub

and then it showed win7 in the menu
THNX EVERYBODY THERE....:):):)