help with grub

[VeeDubZ]

i have xp installed on my primary hard drive(C:/) and I've installed Ubuntu 8.04 to my second hard drive(D:/) as i(and my partner) wanted to keep them separate and immediately after install i got "error 21" from grub so i used super grub to restore the MBR to windows to ask here how to make it work/ ask me which os to boot from....

so any ideas?

[Elfy]

Try rebooting with supergrub and getting it to reinstall grub if that doesn't work boot the livecd and folllow this

https://help.ubuntu.com/community/RecoveringUbuntuAfterInstallingWindows#Quick Start

If you still have problems open a terminal from the apps >Accessories menu of the live cd and run this command


sudo fdisk -l

[VeeDubZ]

Try rebooting with supergrub and getting it to reinstall grub if that doesn't work boot the livecd and folllow this

https://help.ubuntu.com/community/RecoveringUbuntuAfterInstallingWindows#Quick Start

If you still have problems open a terminal from the apps >Accessories menu of the live cd and run this command


sudo fdisk -l


using super grub and re-installing i got the list of os like

ubuntu 8.04
ubuntu 8.04(safe mode or similar cant remember)
windows xp

problem with this was that when i chose the ubuntu options i got error 21 again although the xp option did work.

following the link you gave i was instantly given error 21 upon reboot

the outcome of the fdisk:-


ubuntu@ubuntu:~$ sudo fdisk -l

Disk /dev/sda: 120.0 GB, 120034123776 bytes
255 heads, 63 sectors/track, 14593 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x0bdbe69b

Device Boot Start End Blocks Id System
/dev/sda1 * 1 14592 117210208+ 7 HPFS/NTFS

Disk /dev/sdb: 61.4 GB, 61492838400 bytes
255 heads, 63 sectors/track, 7476 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0xb583b583

Device Boot Start End Blocks Id System
/dev/sdb1 1 7165 57552831 83 Linux
/dev/sdb2 7166 7476 2498107+ 5 Extended
/dev/sdb5 7166 7476 2498076 82 Linux swap / Solaris
Warning: invalid flag 0x0000 of partition table 5 will be corrected by w(rite)

Disk /dev/sdc: 16.7 GB, 16777216000 bytes
255 heads, 63 sectors/track, 2039 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x00054202

Device Boot Start End Blocks Id System
/dev/sdc1 1 1949 15655311 83 Linux
/dev/sdc2 1950 2039 722925 5 Extended
ubuntu@ubuntu:~$




im unsure where to go from here

[cariboo]

Can you bootup the LiveCD and select boot from harddrive from the menu and boot into your Ubuntu installation? If so you should be able to repair grub, by following the instructions here (http://help.ubuntu.com/community/GrubHowto).

Jim

[Blonddeeni]

Hi there. Just saw your post on "grub" and hope that I'm not interrupting too much.
This link may help.
(It has certainly helped me with having four operating systems on the same machine)

http://www.dedoimedo.com/computers/grub.html

I tend to mess about with the "hard Way", and use a live CD version of knoppix.

Cheerio and good luck.

[caljohnsmith]

So are you getting the Grub menu on start up now or a Grub error before seeing the menu? If you get the Grub menu, how abut selecting the first Ubuntu entry, press "e" to edit it, select the line that says "root (hdX,Y)" where X and Y are numbers, press "e" to edit it, change it to "root (hd0,0)", press return to save the change, then press "b" to boot. Based on the info you gave, I think that should be all it takes to boot Ubuntu. Note that the change is not permanent, so you'll need to modify your menu.lst to make it permanent.

So if it works, when you get into Ubuntu, just do:

gksudo gedit /boot/grub/menu.lst
And change the line that says "# groot=(hdX,Y)" to use the (hd0,0) that worked to boot Ubuntu. Save, quit gedit, then run:

sudo update-grub
And you should be all set. If you get the Grub error before seeing the Grub menu though, how about instead doing the following from your Live CD:

cd ~/Desktop && wget 'http://home.comcast.net/~ubuntu_grub/boot_info_script.txt' && sudo bash boot_info_script.txt
That will create a "RESULTS.txt" file in the same directory from where the script is run, namely your desktop; please copy/paste the contents of that file to your next post, highlight the copied text, and click the pound sign # graphic in the Ubuntu forum message box so that the text will get "code" tags put around it. The results of that script will help clarify your setup and hopefully what your problem might be.

[Elfy]

Don't think root hd 0,0 will work - that's a ntfs drive

Could be an issue with sdb -
Warning: invalid flag 0x0000 of partition table 5 will be corrected by w(rite)

Not a message I've seen before.

Might be hd1,0 or hd2,0

[caljohnsmith]

Don't think root hd 0,0 will work - that's a ntfs drive

Could be an issue with sdb -

Not
I agree, (hd0,0) won't work if he has Grub installed to the MBR of his Windows drive, but he said he all ready reinstalled a Windows MBR to his Windows drive with the Super Grub Disk. So if he installed Grub to his Ubuntu drive and is booting the Ubuntu drive, then (hd0,0) should work. If he posts the output of meierfra's script, I think we will know a lot better and won't have to guess. :)

[Elfy]

aah - that wasn't there when I posted - just your root is hd0,0 ;)

[VeeDubZ]

right i have grub installed to the main hard drive and can boot to windows but not to Ubuntu so once i am back at that pc i will try editing the grub loader as advised in the post above....im hopeful that will work.

thanks for the help i will let you know how i get on with it.

[VeeDubZ]

yep that has sorted it, it was hd2,0 easy fix really.....thanks for the help