dual boot Ubuntu & Scientific Linux

[davidoo]

Hi, hope every one is ok!
Using grub from live Ubuntu distribution, I get either grub for Ubuntu or grub for Scientific Linux. But in one case like the other I have only access at one!!!
Doing from Ubuntu, from shell (grub-install /dev/sda or update-grub) I manage (when I switch on the PC) to have 2 choice to boot, but the one give access to Scientific Linux give me “error magic number”.
I did try several manipulation (modifies grub.cfg) but nothing...
Any idea?

[Rubberman]

Post this to the forums at Scientific Linux - Welcome to Scientific Linux (SL) where Scientific Linux is maintained. The short answer is that Ubuntu uses grub2, and Scientific Linux (a derivative of Red Hat Enterprise Linux) uses the older version of grub. You should be able to install the SciLinux grub, and manually configure it to allow you to boot Ubuntu, but I haven't actually done that, so I don't know for sure it would work or not.

P.S. My wife is a physicist at FermiLab and works in their computing division. She has both Ubuntu and Scientific Linux running dual boot on her netbook, so I know it can be done.

[devils casper]

Hi and Welcome !

Which version of Ubuntu are you using? GRUB version doesn't matter at all. You can use any version of GRUB to boot up any OS.
Post the output of fdisk -l command here.

[davidoo]

Thanks Rubberman and devils casper for your answers.
Going head, I've understood than Slinux doesn't support yet ext4 (/dev/sda6 is formated as ext4).
I'm trying to see if I can downgrade from ext4 to ext3. Doing that way, Slinux grub may find ubuntu. So far, when I start from Slinux grub (/dev/sda7) and try to reach Ubuntu (/dev/sda6) it say that it is not able to handle the type of files system.

Disk /dev/sda: 160.0 GB, 160041885696 bytes
255 heads, 63 sectors/track, 19457 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x00000080

Device Boot Start End Blocks Id System
/dev/sda1 * 1 9258 74364853+ 5 Extended
/dev/sda2 9259 19457 81923467+ 83 Linux
/dev/sda5 1 255 2048224+ 82 Linux swap / Solaris
/dev/sda6 256 5354 40957686 83 Linux
/dev/sda7 5355 9258 31358848+ 83 Linux

Thanks again for your help

[davidoo]

Excuse me..
- Release 9.10 (karmic)
- Kernel Linux 2.6.31-16-generic
Thank

[davidoo]

Hi
Ok no answer... Now my Ubuntu partition is ext3 but style nothing to do.
From Grug, install from Ubuntu, it say: error magic number and from grub, install from SLinux: Error 15 file no found...
Here grub install from Ubuntu:

************************************************** ************

#

# DO NOT EDIT THIS FILE

#

# It is automatically generated by /usr/sbin/grub-mkconfig using templates

# from /etc/grub.d and settings from /etc/default/grub

#



### BEGIN /etc/grub.d/00_header ###

if [ -s /boot/grub/grubenv ]; then

have_grubenv=true

load_env

fi

set default="0"

if [ ${prev_saved_entry} ]; then

saved_entry=${prev_saved_entry}

save_env saved_entry

prev_saved_entry=

save_env prev_saved_entry

fi

insmod ext2

set root=(hd0,6)

search --no-floppy --fs-uuid --set b7beb653-2d2b-4adb-aeb9-c89fb990bed8

if loadfont /usr/share/grub/unicode.pf2 ; then

set gfxmode=640x480

insmod gfxterm

insmod vbe

if terminal_output gfxterm ; then true ; else

# For backward compatibility with versions of terminal.mod that don't

# understand terminal_output

terminal gfxterm

fi

fi

if [ ${recordfail} = 1 ]; then

set timeout=-1

else

set timeout=10

fi

### END /etc/grub.d/00_header ###



### BEGIN /etc/grub.d/05_debian_theme ###

set menu_color_normal=white/black

set menu_color_highlight=black/white

### END /etc/grub.d/05_debian_theme ###



### BEGIN /etc/grub.d/10_linux ###

menuentry "Ubuntu, Linux 2.6.31-20-generic" {

recordfail=1

if [ -n ${have_grubenv} ]; then save_env recordfail; fi

set quiet=1

insmod ext2

set root=(hd0,6)

search --no-floppy --fs-uuid --set b7beb653-2d2b-4adb-aeb9-c89fb990bed8

linux /boot/vmlinuz-2.6.31-20-generic root=UUID=b7beb653-2d2b-4adb-aeb9-c89fb990bed8 ro quiet splash

initrd /boot/initrd.img-2.6.31-20-generic

}

menuentry "Ubuntu, Linux 2.6.31-20-generic (recovery mode)" {

recordfail=1

if [ -n ${have_grubenv} ]; then save_env recordfail; fi

insmod ext2

set root=(hd0,6)

search --no-floppy --fs-uuid --set b7beb653-2d2b-4adb-aeb9-c89fb990bed8

linux /boot/vmlinuz-2.6.31-20-generic root=UUID=b7beb653-2d2b-4adb-aeb9-c89fb990bed8 ro single

initrd /boot/initrd.img-2.6.31-20-generic

}

menuentry "Ubuntu, Linux 2.6.31-14-generic" {

recordfail=1

if [ -n ${have_grubenv} ]; then save_env recordfail; fi

set quiet=1

insmod ext2

set root=(hd0,6)

search --no-floppy --fs-uuid --set b7beb653-2d2b-4adb-aeb9-c89fb990bed8

linux /boot/vmlinuz-2.6.31-14-generic root=UUID=b7beb653-2d2b-4adb-aeb9-c89fb990bed8 ro quiet splash

initrd /boot/initrd.img-2.6.31-14-generic

}

menuentry "Ubuntu, Linux 2.6.31-14-generic (recovery mode)" {

recordfail=1

if [ -n ${have_grubenv} ]; then save_env recordfail; fi

insmod ext2

set root=(hd0,6)

search --no-floppy --fs-uuid --set b7beb653-2d2b-4adb-aeb9-c89fb990bed8

linux /boot/vmlinuz-2.6.31-14-generic root=UUID=b7beb653-2d2b-4adb-aeb9-c89fb990bed8 ro single

initrd /boot/initrd.img-2.6.31-14-generic

}

menuentry "Ubuntu, Linux 2.6.28-11-generic" {

recordfail=1

if [ -n ${have_grubenv} ]; then save_env recordfail; fi

set quiet=1

insmod ext2

set root=(hd0,6)

search --no-floppy --fs-uuid --set b7beb653-2d2b-4adb-aeb9-c89fb990bed8

linux /boot/vmlinuz-2.6.28-11-generic root=UUID=b7beb653-2d2b-4adb-aeb9-c89fb990bed8 ro quiet splash

initrd /boot/initrd.img-2.6.28-11-generic

}

menuentry "Ubuntu, Linux 2.6.28-11-generic (recovery mode)" {

recordfail=1

if [ -n ${have_grubenv} ]; then save_env recordfail; fi

insmod ext2

set root=(hd0,6)

search --no-floppy --fs-uuid --set b7beb653-2d2b-4adb-aeb9-c89fb990bed8

linux /boot/vmlinuz-2.6.28-11-generic root=UUID=b7beb653-2d2b-4adb-aeb9-c89fb990bed8 ro single

initrd /boot/initrd.img-2.6.28-11-generic

}

### END /etc/grub.d/10_linux ###



### BEGIN /etc/grub.d/20_memtest86+ ###

menuentry "Memory test (memtest86+)" {

linux16 /boot/memtest86+.bin

}

menuentry "Memory test (memtest86+, serial console 115200)" {

linux16 /boot/memtest86+.bin console=ttyS0,115200n8

}

### END /etc/grub.d/20_memtest86+ ###



### BEGIN /etc/grub.d/30_os-prober ###

menuentry "Scientific Linux SL release 5.4 (Boron) (on /dev/sda7)" {

insmod ext2

set root=(hd0,7)

search --no-floppy --fs-uuid --set 452f675c-4024-4ea3-b26d-bd72e9aea646

linux /boot/vmlinuz-2.6.18-164.15.1.el5xen root=/dev/sda7

}



### END /etc/grub.d/30_os-prober ###



### BEGIN /etc/grub.d/40_custom ###

# This file provides an easy way to add custom menu entries. Simply type the

# menu entries you want to add after this comment. Be careful not to change

# the 'exec tail' line above.

### END /etc/grub.d/40_custom ###

************************************************** ************

Here grub install from Slinux:


# grub.conf generated by livecd-install

default=0

timeout=10

splashimage=(hd0,6)/boot/grub/splash.xpm.gz

#hiddenmenu

title Scientific Linux SL (2.6.18-164.15.1.el5)

root (hd0,6)

kernel /boot/vmlinuz-2.6.18-164.15.1.el5 ro root=/dev/sda7

initrd /boot/initrd-2.6.18-164.15.1.el5.img



title Scientific Linux SL release 5.4 (Boron) (2.6.18-164.6.1.el5)

root (hd0,6)

kernel /boot/vmlinuz-2.6.18-164.6.1.el5 ro root=/dev/sda7

initrd /boot/initrd-2.6.18-164.6.1.el5.img



#### -> I did this (wrong) part <- ###

title Ubuntu Linux 2.6.31-20-generic

root=(hd0,6)

kernel /boot/vmlinuz-2.6.31-20-generic root=UUID=b7beb653-2d2b-4adb-aeb9-c89fb990bed8 ro quiet splash

initrd /boot/initrd.img-2.6.31-20-generic


************************************************** ************


Any idea??? suggestions..?

[trutheality]

Please use code tags for code.

You should probably go from the Ubuntu grub to the Slinux grub because a newer version of grub can boot from both ext4 and ext3.

I think the problem with the Ubuntu grub is that it was pointing to the wrong image

linux /boot/vmlinuz-2.6.18-164.15.1.el5xen

where the other grub has

kernel /boot/vmlinuz-2.6.18-164.15.1.el5