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itsmemad · 10-02-09, 10:29 AM

Couple of months back, I installed Windows 7 RC version and it replaced the Grub with Windows boot options. The only options to boot now are Windows 7 and Earlier version of Windows (Win XP). Hence, I can not access my Ubuntu Linux anymore.

I've tried using the EasyBCD 1.7.2. to restore the boot options but it can not. Even if it can, I don't know how to do it. Somebody please assist me how to access the Linux partition again without loosing any data including all the Operating Systems.

Thanks.

imrock · 10-02-09, 11:40 AM

try to install linux again.

matrix · 10-02-09, 11:56 AM

Try installing linux again, it should detect the existing installation, and give option to restore boot loader. I am not sure whether this option is available in ubuntu as I am a mandriva user. In case of mandriva this option is there.

You can also install ext2fs utility in windows and copy the data from your linux partision then can do a fresh install.

hitesh.07 · 10-03-09, 01:29 PM

Quote:

When using the Live CD approach, DO NOT setup grub on (hd0,1) or whatever is behind the comma for you. USE "setup (hdo)" instead.

This will reinstall grub on your MBR which is what you want, I tried the hd0,1 approach first with no luck and that made sure that the linux OS could not be booted when running setup (hd0) afterwards. I guess it installed the grub boot files where the linux kernel were supposed to boot from.

So to sum it all up, this is what I do(Overwrites MBR):

Boot the livecd.
Start a terminal.

sudo -i
grub
find /boot/grub/stage1 //if u get error type without quotes 'find /grub/stage1' :Will print something like (hd0,1)
root (hd0,1)
setup (hd0)
quit

Taken from John Asbjørn Braastu - Windows reinstall messes up grub.
Worked for me.HTH

matrix · 10-03-09, 04:29 PM

itsmemad is missing!! hope his problem is resolved

Luke Skywalker · 10-03-09, 08:34 PM

Quote:

Originally Posted by hitesh.07

Taken from John Asbjørn Braastu - Windows reinstall messes up grub.
Worked for me.HTH

Method you have given is good but will not work for all.

As all distro don't give premission to install or let you touch or change partition. You can use a distro that does & install & set up a grub in boot partition.

naqviabbas · 10-17-09, 10:54 AM

1) Boot from the installation disk.
2) Choose the rescue mode. You can even hit the R key at boot time to get to rescue mode.
3) At the terminal type in chroot /mnt/sysimage
4) Type fdisk -l
5) note down what the first entry under 'Device Boot'.
6) Then type grub-install the entry from Device Boot **
7) reboot
8) Pull out the installation disk from the drive and continue.

Luke Skywalker · 10-17-09, 11:35 PM

Quote:

Originally Posted by naqviabbas

1) Boot from the installation disk.
2) Choose the rescue mode. You can even hit the R key at boot time to get to rescue mode.
3) At the terminal type in chroot /mnt/sysimage
4) Type fdisk -l
5) note down what the first entry under 'Device Boot'.
6) Then type grub-install the entry from Device Boot **
7) reboot
8) Pull out the installation disk from the drive and continue.

grub-install doesn't work in chrooted environment. You will have to type this first:

Quote:

grep -v rootfs /proc/mounts > /etc/mtab

Now do one of these:

grub-install doesn't work like this if you don't have floppy drive it will just hang if you don't type like this:

Quote:

grub-install --no-floppy /dev/sda

or

Start a grub shell like this:

Quote:

grub --no-floppy

then

Quote:

grub> root (hd0,0) (Specify where your /boot partition resides. e.g. if it does on /dev/sda2 type (hd0,1) or if /dev/sdb1 type (hd1,0) )
grub> setup (hd0) (Install GRUB in the MBR)
grub> quit (Exit the GRUB shell)

PS: I know this because i use gentoo Also check out this:
Gentoo Linux Documentation -- Gentoo Grub Error Collection

naqviabbas · 10-18-09, 09:53 AM

Let us analyze.
At a macro level.

Apparantly, the guy had his MBR over-written. Meaninng, he still has his grub.conf sitting on the filesystem. He does not need a fresh install of grub. A restoration will work fine.

After booting, he has to mount the root partition to a mount point.
chrooting to the mount point gives his exclusive access to the faulty installation.

Then he descends into the grub directory, and runs the grub-install command.

refer to line 7 on the indicated page.
"gnu org/software/grub/manual/html_node/Installing-GRUB-using-grub_002dinstall.html"
works smooth on fc10 and dsl

Luke Skywalker · 10-23-09, 01:59 AM

I know his mbr had been overwritten & have been removed from the first sector. In chroot /etc/mtab is not there which lists filesystems so he can't access file systems. You will have to copy /proc/mounts to /etc/mtab or write your own.I have not said to re-install from beginning.
grub-install should give error according to me if a guy don't have floppy drive. Your computer will hang when grub probes for floppy.
Instead he should do what I have written.
No, he don't need to descend into grub directory as grub is install. Type grub in a terminal. It is a command. You will descend into grub shell.

sda is use in sata drive & hd in ide. But hd is also used for sda it depends where you want to use.

pshrinivasan · 10-23-09, 06:17 AM

Please download EasyBCD 2.0 Beta from the website Neosmart and add Linux in the 3rd page, to the Add an Entry. Only this works in restoring the Grub in Windows 7. Note: you have to register to download the EasyBCD 2.0 Beta.
EasyBCD 1.7 doesn't work in Win7

ashwani40in · 10-27-09, 01:59 PM

Use easy BCD and get it fixed

10-02-09, 10:29 AM	#1
itsmemad Alligator Join Date: Sep 2008 Location: Pleasure drome Posts: 3,514 Rep Power: 10	Linux missing from boot options after installing Windows 7 Couple of months back, I installed Windows 7 RC version and it replaced the Grub with Windows boot options. The only options to boot now are Windows 7 and Earlier version of Windows (Win XP). Hence, I can not access my Ubuntu Linux anymore. I've tried using the EasyBCD 1.7.2. to restore the boot options but it can not. Even if it can, I don't know how to do it. Somebody please assist me how to access the Linux partition again without loosing any data including all the Operating Systems. Thanks.

10-17-09, 10:54 AM	#7
naqviabbas Junior Member Join Date: Oct 2008 Location: hyderabad melbourne Posts: 4 Rep Power: 0	Your grub got over-written by the windows 7 bootloader. Follow the instructions below 1) Boot from the installation disk. 2) Choose the rescue mode. You can even hit the R key at boot time to get to rescue mode. 3) At the terminal type in chroot /mnt/sysimage 4) Type fdisk -l 5) note down what the first entry under 'Device Boot'. 6) Then type grub-install the entry from Device Boot 7) reboot** 8) Pull out the installation disk from the drive and continue.

10-27-09, 01:59 PM	#12
ashwani40in Junior Member Join Date: Mar 2009 Location: New Delhi Posts: 2 Rep Power: 0	Use easy BCD Use easy BCD and get it fixed

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10-02-09, 11:40 AM	#2
imrock Gold Member Join Date: Sep 2008 Posts: 748 Rep Power: 3	try to install linux again.

10-02-09, 11:56 AM	#3
matrix Bronze Member Join Date: Dec 2008 Location: Kalyan West Posts: 254 Rep Power: 1	Try installing linux again, it should detect the existing installation, and give option to restore boot loader. I am not sure whether this option is available in ubuntu as I am a mandriva user. In case of mandriva this option is there. You can also install ext2fs utility in windows and copy the data from your linux partision then can do a fresh install.

10-03-09, 04:29 PM	#5
matrix Bronze Member Join Date: Dec 2008 Location: Kalyan West Posts: 254 Rep Power: 1	itsmemad is missing!! hope his problem is resolved

10-18-09, 09:53 AM	#9
naqviabbas Junior Member Join Date: Oct 2008 Location: hyderabad melbourne Posts: 4 Rep Power: 0	Let us analyze. At a macro level. Apparantly, the guy had his MBR over-written. Meaninng, he still has his grub.conf sitting on the filesystem. He does not need a fresh install of grub. A restoration will work fine. After booting, he has to mount the root partition to a mount point. chrooting to the mount point gives his exclusive access to the faulty installation. Then he descends into the grub directory, and runs the grub-install command. refer to line 7 on the indicated page. "gnu org/software/grub/manual/html_node/Installing-GRUB-using-grub_002dinstall.html" works smooth on fc10 and dsl

10-23-09, 01:59 AM	#10
Luke Skywalker Jedi knight Join Date: Jul 2009 Location: IBF Age: 21 Posts: 1,816 Rep Power: 5	I know his mbr had been overwritten & have been removed from the first sector. In chroot /etc/mtab is not there which lists filesystems so he can't access file systems. You will have to copy /proc/mounts to /etc/mtab or write your own.I have not said to re-install from beginning. grub-install should give error according to me if a guy don't have floppy drive. Your computer will hang when grub probes for floppy. Instead he should do what I have written. No, he don't need to descend into grub directory as grub is install. Type grub in a terminal. It is a command. You will descend into grub shell. sda is use in sata drive & hd in ide. But hd is also used for sda it depends where you want to use.

10-23-09, 06:17 AM	#11
pshrinivasan Junior Member Join Date: Jan 2009 Location: Mysore,Karnataka Posts: 81 Rep Power: 1	Please download EasyBCD 2.0 Beta from the website Neosmart and add Linux in the 3rd page, to the Add an Entry. Only this works in restoring the Grub in Windows 7. Note: you have to register to download the EasyBCD 2.0 Beta. EasyBCD 1.7 doesn't work in Win7

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Linux missing from boot options after installing Windows 7

Linux missing from boot options after installing Windows 7

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