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SteveThePirate87 11-12-2012 11:03 AM
Can't enter SolusOS 1.7 entry on CentOS 6.3 grub menu
 
Hi guys,

Just wondering, I installed CentOS onto my desktop that originally had SolusOS (debian based distro) on it so i could dual boot between the two. However it seems CentOS's grub has missed out the entry for Solus and i can't boot into it. So i opened up the grub.conf and added a new entry for it but the problem is that i'm guessing i need to enter the kernel path for solus such as the CentOS entries above but i'm stuck on how to do this so i can boot sucessfully to both Cent and Solus.

Is there a command to probe the solus installation in hd0,2 for the info to copy into the grub.conf?

Here is the output of grub.conf and my crappy attempt to add Solus at the bottom;
Code:
# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE:  You do not have a /boot partition.  This means that
#          all kernel and initrd paths are relative to /, eg.
#          root (hd0,5)
#          kernel /boot/vmlinuz-version ro root=/dev/sdb6
#          initrd /boot/initrd-[generic-]version.img
#boot=/dev/sdb
default=0
timeout=5
splashimage=(hd0,5)/boot/grub/splash.xpm.gz
#hiddenmenu
title CentOS (2.6.32-279.14.1.el6.i686)
        root (hd0,5)
        kernel /boot/vmlinuz-2.6.32-279.14.1.el6.i686 ro root=UUID=5fb797a4-5a54-42ad-888a-49f80300bb73 rd_NO_LUKS  KEYBOARDTYPE=pc KEYTABLE=uk LANG=en_US.UTF-8 rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=auto rd_NO_LVM rd_NO_DM rhgb quiet
        initrd /boot/initramfs-2.6.32-279.14.1.el6.i686.img
title CentOS (2.6.32-279.el6.i686)
        root (hd0,5)
        kernel /boot/vmlinuz-2.6.32-279.el6.i686 ro root=UUID=5fb797a4-5a54-42ad-888a-49f80300bb73 rd_NO_LUKS  KEYBOARDTYPE=pc KEYTABLE=uk LANG=en_US.UTF-8 rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=auto rd_NO_LVM rd_NO_DM rhgb quiet
        initrd /boot/initramfs-2.6.32-279.el6.i686.img
title SolusOS
        root (hd0,2)
        chainloader +1
Any ideas?

Cheers

Steve

bigrigdriver 11-12-2012 12:38 PM
If you are certain that you didn't install CentOS over Solus, then you should run "/usr/sbin/update-grub2 -o /boot/grub/grub.cfg" (as root, and without the quotes) to probe for bootable OSs and rewrite the grub.cfg file.

It may also work by simply running /usr/sbin/update-grub2.

SteveThePirate87 11-12-2012 01:24 PM
Nice one i'll give that command a shot. I'm positive i haven't overwritten solus because i've got it partitioned that cent's / is hda0,5 and the /home is hda0,6 with solus and the swap etc at the beginning. I'll report back later with the results (fingers crossed)

Thanks dude.

yancek 11-12-2012 01:55 PM
The Grub file you posted (grub.conf) is from Grub Legacy so updating grub2 isn't going to help. The chainloader entry you have in the grub.conf for Solus should work if your Solus boot files are on the first drive, third partition. It would probably be best to boot CentOS and mount the partition(s) you think Solus boot files are on to make sure you are pointing to the correct partition/files.

SteveThePirate87 11-12-2012 04:31 PM
I'm getting an Error13: Invalid or unsupported executable format. Googling this says it basically can't find the kernel image, is that right? Would installing grub2 fix this issue or is there a more recommended solution i could try?

yancek 11-12-2012 06:58 PM
Quote:
Error13: Invalid or unsupported executable format.
You might have your Solus entry pointing to the swap partition, that is, if CentOS and Solus are the only operating systems you have. I would suggest going to the site below and reading the information on the bootinfoscript, downloading it and running it. It will produce a file named results.txt in your user /home directory. Review it and if you can't figure it out, post the file here.

http://sourceforge.net/projects/bootinfoscript/

SteveThePirate87 11-13-2012 02:59 AM
Hi

Here is the output of the script
Code:
                  Boot Info Script 0.61      [1 April 2012]


============================= Boot Info Summary: ===============================

 => Grub Legacy0.97 is installed in the MBR of /dev/sdc and looks at sector
    293660672 on boot drive #1 for the stage2 file.  A stage2 file is at this
    location on /dev/sdc.  Stage2 looks on partition #6 for
    /boot/grub/grub.conf..

sdc1: __________________________________________________________________________

    File system:      swap
    Boot sector type:  Grub2 (v1.99)
    Boot sector info:  Grub2 (v1.99) is installed in the boot sector of sdc1
                      and looks at sector 50434 of the same hard drive for
                      core.img, but core.img can not be found at this
                      location.

sdc2: __________________________________________________________________________

    File system:      ext4
    Boot sector type:  -
    Boot sector info:
    Operating System:  SolusOS Eveline
    Boot files:        /boot/grub/grub.cfg /etc/fstab /boot/grub/core.img

sdc3: __________________________________________________________________________

    File system:      ext4
    Boot sector type:  -
    Boot sector info:
    Operating System: 
    Boot files:       

sdc4: __________________________________________________________________________

    File system:      Extended Partition
    Boot sector type:  -
    Boot sector info:

sdc5: __________________________________________________________________________

    File system:      ext4
    Boot sector type:  -
    Boot sector info:
    Operating System: 
    Boot files:       

sdc6: __________________________________________________________________________

    File system:      ext4
    Boot sector type:  -
    Boot sector info:
    Operating System:  CentOS release 6.3 (Final)
                      Kernel on an
    Boot files:        /boot/grub/menu.lst /boot/grub/grub.conf /etc/fstab

============================ Drive/Partition Info: =============================

Drive: sdc _____________________________________________________________________

Disk /dev/sdc: 160.0 GB, 160041885696 bytes
255 heads, 63 sectors/track, 19457 cylinders, total 312581808 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes

Partition  Boot  Start Sector    End Sector  # of Sectors  Id System

/dev/sdc1              2,048    2,869,247    2,867,200  82 Linux swap / Solaris
/dev/sdc2          2,869,248    23,349,247    20,480,000  83 Linux
/dev/sdc3    *    23,349,248  228,149,247  204,800,000  83 Linux
/dev/sdc4        228,149,248  312,580,095    84,430,848  5 Extended
/dev/sdc5        228,153,344  292,100,095    63,946,752  83 Linux
/dev/sdc6    *    292,102,144  312,580,095    20,477,952  83 Linux


"blkid" output: ________________________________________________________________

Device          UUID                                  TYPE      LABEL

/dev/sdc1        eb064b23-7e58-4500-9655-af237daae998  swap     
/dev/sdc2        fc789d96-cf57-46a4-a67e-2c6797e96265  ext4     
/dev/sdc3        b8708a17-a0e0-49a6-a253-6755d517ca9d  ext4     
/dev/sdc5        b025b7af-7296-4e78-bc97-5f53d0d2018d  ext4     
/dev/sdc6        5fb797a4-5a54-42ad-888a-49f80300bb73  ext4      _CentOS-6.3-i386

================================ Mount points: =================================

Device          Mount_Point              Type      Options

/dev/sdc5        /home                    ext4      (rw)
/dev/sdc6        /                        ext4      (rw)


=========================== sdc2/boot/grub/grub.cfg: ===========================

--------------------------------------------------------------------------------
#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#

### BEGIN /etc/grub.d/00_header ###
if [ -s $prefix/grubenv ]; then
  load_env
fi
set default="0"
if [ "${prev_saved_entry}" ]; then
  set saved_entry="${prev_saved_entry}"
  save_env saved_entry
  set prev_saved_entry=
  save_env prev_saved_entry
  set boot_once=true
fi

function savedefault {
  if [ -z "${boot_once}" ]; then
    saved_entry="${chosen}"
    save_env saved_entry
  fi
}

function load_video {
  insmod vbe
  insmod vga
  insmod video_bochs
  insmod video_cirrus
}

insmod part_msdos
insmod ext2
set root='(/dev/sda,msdos2)'
search --no-floppy --fs-uuid --set fc789d96-cf57-46a4-a67e-2c6797e96265
if loadfont /usr/share/grub/unicode.pf2 ; then
  set gfxmode=640x480
  load_video
  insmod gfxterm
fi
terminal_output gfxterm
insmod part_msdos
insmod ext2
set root='(/dev/sda,msdos2)'
search --no-floppy --fs-uuid --set fc789d96-cf57-46a4-a67e-2c6797e96265
insmod jpeg
background_image -m stretch /usr/share/backgrounds/splash.jpg
insmod part_msdos
insmod ext2
set root='(/dev/sda,msdos2)'
search --no-floppy --fs-uuid --set fc789d96-cf57-46a4-a67e-2c6797e96265
set locale_dir=($root)/boot/grub/locale
set lang=en
insmod gettext
set timeout=5
### END /etc/grub.d/00_header ###

### BEGIN /etc/grub.d/05_debian_theme ###
insmod part_msdos
insmod ext2
set root='(/dev/sda,msdos2)'
search --no-floppy --fs-uuid --set fc789d96-cf57-46a4-a67e-2c6797e96265
insmod jpeg
if background_image /usr/share/backgrounds/splash.jpg; then
  true
else
  set menu_color_normal=cyan/blue
  set menu_color_highlight=white/blue
fi
### END /etc/grub.d/05_debian_theme ###

### BEGIN /etc/grub.d/10_linux ###
menuentry 'SolusOS GNU/Linux, with Linux 3.3.6-solusos' --class solusos --class gnu-linux --class gnu --class os {
        insmod part_msdos
        insmod ext2
        set root='(/dev/sda,msdos2)'
        search --no-floppy --fs-uuid --set fc789d96-cf57-46a4-a67e-2c6797e96265
        echo        'Loading Linux 3.3.6-solusos ...'
        linux        /boot/vmlinuz-3.3.6-solusos root=UUID=fc789d96-cf57-46a4-a67e-2c6797e96265 ro  quiet splash vga=792
        echo        'Loading initial ramdisk ...'
        initrd        /boot/initrd.img-3.3.6-solusos
}
menuentry 'SolusOS GNU/Linux, with Linux 3.3.6-solusos (recovery mode)' --class solusos --class gnu-linux --class gnu --class os {
        insmod part_msdos
        insmod ext2
        set root='(/dev/sda,msdos2)'
        search --no-floppy --fs-uuid --set fc789d96-cf57-46a4-a67e-2c6797e96265
        echo        'Loading Linux 3.3.6-solusos ...'
        linux        /boot/vmlinuz-3.3.6-solusos root=UUID=fc789d96-cf57-46a4-a67e-2c6797e96265 ro single
        echo        'Loading initial ramdisk ...'
        initrd        /boot/initrd.img-3.3.6-solusos
}
### END /etc/grub.d/10_linux ###

### BEGIN /etc/grub.d/20_linux_xen ###
### END /etc/grub.d/20_linux_xen ###

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

### BEGIN /etc/grub.d/41_custom ###
if [ -f  $prefix/custom.cfg ]; then
  source $prefix/custom.cfg;
fi
### END /etc/grub.d/41_custom ###
--------------------------------------------------------------------------------

=============================== sdc2/etc/fstab: ================================

--------------------------------------------------------------------------------
# UNCONFIGURED FSTAB FOR BASE SYSTEM
proc        /proc        proc        defaults        0        0
# /dev/sda1
UUID=eb064b23-7e58-4500-9655-af237daae998        swap        swap        sw        0        0
# /dev/sda2
UUID=fc789d96-cf57-46a4-a67e-2c6797e96265        /        ext4        rw,errors=remount-ro        0        1
# /dev/sda3
UUID=b8708a17-a0e0-49a6-a253-6755d517ca9d        /home        ext4        rw,errors=remount-ro        0        0
tmpfs        /tmp        tmpfs        nodev,nosuid        0        0--------------------------------------------------------------------------------

=================== sdc2: Location of files loaded by Grub: ====================

          GiB - GB            File                                Fragment(s)

  4.071651459 = 4.371902464    boot/grub/core.img                            1
  3.686855316 = 3.958730752    boot/grub/grub.cfg                            1
  4.624767303 = 4.965806080    boot/initrd.img-3.3.6-solusos                  2
  4.440341949 = 4.767780864    boot/vmlinuz-3.3.6-solusos                    1
  4.624767303 = 4.965806080    initrd.img                                    2
  4.440341949 = 4.767780864    vmlinuz                                        1

========================== sdc6/boot/grub/grub.conf: ===========================

--------------------------------------------------------------------------------
# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE:  You do not have a /boot partition.  This means that
#          all kernel and initrd paths are relative to /, eg.
#          root (hd0,5)
#          kernel /boot/vmlinuz-version ro root=/dev/sdb6
#          initrd /boot/initrd-[generic-]version.img
#boot=/dev/sdb
default=0
timeout=5
splashimage=(hd0,5)/boot/grub/splash.xpm.gz
#hiddenmenu
title CentOS (2.6.32-279.14.1.el6.i686)
        root (hd0,5)
        kernel /boot/vmlinuz-2.6.32-279.14.1.el6.i686 ro root=UUID=5fb797a4-5a54-42ad-888a-49f80300bb73 rd_NO_LUKS  KEYBOARDTYPE=pc KEYTABLE=uk LANG=en_US.UTF-8 rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=auto rd_NO_LVM rd_NO_DM rhgb quiet
        initrd /boot/initramfs-2.6.32-279.14.1.el6.i686.img
title CentOS (2.6.32-279.el6.i686)
        root (hd0,5)
        kernel /boot/vmlinuz-2.6.32-279.el6.i686 ro root=UUID=5fb797a4-5a54-42ad-888a-49f80300bb73 rd_NO_LUKS  KEYBOARDTYPE=pc KEYTABLE=uk LANG=en_US.UTF-8 rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=auto rd_NO_LVM rd_NO_DM rhgb quiet
        initrd /boot/initramfs-2.6.32-279.el6.i686.img
title SolusOS
        root (hd0,2)
        kernel /boot/grub/grub.cfg /etc/fstab /boot/grub/core.img
--------------------------------------------------------------------------------

=============================== sdc6/etc/fstab: ================================

--------------------------------------------------------------------------------

#
# /etc/fstab
# Created by anaconda on Mon Nov 12 15:15:38 2012
#
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
UUID=5fb797a4-5a54-42ad-888a-49f80300bb73 /                      ext4    defaults        1 1
UUID=b025b7af-7296-4e78-bc97-5f53d0d2018d /home                  ext4    defaults        1 2
UUID=eb064b23-7e58-4500-9655-af237daae998 swap                    swap    defaults        0 0
tmpfs                  /dev/shm                tmpfs  defaults        0 0
devpts                  /dev/pts                devpts  gid=5,mode=620  0 0
sysfs                  /sys                    sysfs  defaults        0 0
proc                    /proc                  proc    defaults        0 0
--------------------------------------------------------------------------------

=================== sdc6: Location of files loaded by Grub: ====================

          GiB - GB            File                                Fragment(s)

 140.303272247 = 150.649491456  boot/grub/grub.conf                            1
 140.303272247 = 150.649491456  boot/grub/menu.lst                            1
 140.028438568 = 150.354391040  boot/grub/stage2                              1
 141.947853088 = 152.415346688  boot/initramfs-2.6.32-279.14.1.el6.i686.img    1
 141.214405060 = 151.627812864  boot/initramfs-2.6.32-279.el6.i686.img        2
 141.394096375 = 151.820754944  boot/vmlinuz-2.6.32-279.14.1.el6.i686          1
 140.539169312 = 150.902784000  boot/vmlinuz-2.6.32-279.el6.i686              1

========= Devices which don't seem to have a corresponding hard drive: =========

sdd sde sdf sdg

=============================== StdErr Messages: ===============================

  No volume groups found
mdadm: No arrays found in config file or automatically

yancek 11-13-2012 09:17 AM
The bootinfoscript shows Solus and its boot files are on sdc2. Grub Legacy counts drives and partitions from zero (0) while Grub2 counts drives from zero (0) and partitions fro one (1). Change the entry in the grub.conf file for Solus to:

Quote:
title SolusOS
root (hd0,1)
chainloader +1
Or you could use this:

Quote:
title SolusOS
root (hd0,1)
kernel /boot/grub/core.img
#savedefault
#boot
The savedefault and boot lines above will not be read as they have the hash mark (#), if that fails you could remove the hash mark. Some systems require them, others don't.

What I find curious about your system is that you seem to have only one drive yet it is labelled as sdc?
Did you have other drives attached during the installation?
Are you able to boot CentOS with the entry you have in its grub.conf file?
Normally, booting sdc6 would require a root entry for Grub of (hd2,5) and for Solus (hd2,1)??

SteveThePirate87 11-13-2012 09:44 AM
Hi,

Code:
title SolusOS
root (hd0,1)
kernel /boot/grub/core.img
#savedefault
#boot
worked a treat! It brought up the solus grub menu which in turn booted into SolusOS. I think the partitions where showing as sdc because i had a usb flash drive and usb hard drive plugged in and somehow labeled the system partitions up a bit. It shows as sdb when just one of them was plugged in and with none its sda.

Thanks for that by the way Yancek, you were very helpful I appreciate it.

Steve


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