Grub 2

[Zhivargo]

Hey sorry cant find a solution to this:

following instructions to add Win 7 in Grub, i managed to add an entry but then system hangs...

#
#! /bin/sh -e
echo "Adding Windows" >&2
cat << EOF
menuentry "Windows 7" {
set root=(hd0,3)
chainloader +1
}
EOF
#


fdisk -l


Device Boot Start End Blocks Id System
/dev/sda1 * 1 25 194560 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2 25 128410 1031248897 5 Extended
/dev/sda3 128410 192151 512000000 7 HPFS/NTFS
Partition 3 does not end on cylinder boundary.
/dev/sda5 25 6104 48827392 83 Linux
/dev/sda6 6104 127680 976561152 83 Linux
/dev/sda7 127680 128410 5858304 82 Linux swap / Solaris

so correct me if im wrong but the root should point to (hd0,3) in Grub2??
its giving me headaches!

[dino99]

your problem: Partition 3 does not end on cylinder boundary

so first fix it: chkdsk on winblow or fsck on linux, if you cant, then use a formatting tool

[oldfred]

With LBA cylinders have not been used for 10+ years. The new partitioning with win or gparted use different rounding that is more compatible with SSDs & new 4k drives. It may leave small amounts of space on a drive. Older partitions also had some space left but it was less than 1K so you did not see it due to rounding, now it is slightly over 1K so you may see it.

Post this:
Boot Info Script courtesy of forum member meierfra
Page with instructions and download:
http://bootinfoscript.sourceforge.net/
Paste results.txt, then highlight entire file and click on # in edit panel(code tags) to make it easier to read.
Or You can generate the tags first by pressing the # icon in the post's menu and then paste the contents between the generated [ code] paste here [ /code] tags.

[kansasnoob]

Paste results.txt, then highlight entire file and click on # in edit panel(code tags) to make it easier to read.
Or You can generate the tags first by pressing the # icon in the post's menu and then paste the contents between the generated [ code] paste here [ /code] tags.

@ oldfred, I like that explanation. I've been trying to find the right words to describe how to do that. It makes all the difference in the world to those of us who read these things. As an example, just a snippet of fdisk -lu without and then with:


Device Boot Start End Blocks Id System
/dev/sda1 * 63 84646484 42323211 83 Linux



Device Boot Start End Blocks Id System
/dev/sda1 * 63 84646484 42323211 83 Linux


I'm old, and I'm lazy, make it easy for me to read :D

[oldfred]

kansas,

I keep changing my explanation to try to make it more clear to new users. They just do not seem to understand highlighting & the # in the edit panel. Maybe they do not understand what edit panel is or that they just paste anyway. I only get half to do it correctly even with my expanded explanation.:icon_frown:

I too need it easy to read.

[presence1960]

@ oldfred, I like that explanation. I've been trying to find the right words to describe how to do that. It makes all the difference in the world to those of us who read these things. As an example, just a snippet of fdisk -lu without and then with:




Device Boot Start End Blocks Id System
/dev/sda1 * 63 84646484 42323211 83 Linux


I'm old, and I'm lazy, make it easy for me to read :D

:lolflag:

[Zhivargo]

thanks for your help guys!
@oldfred:


your script is awesome!

[Zhivargo]

i made a new partition and mapped it to the cylinder block, but i still get the same message with fdisk. ??? !!! are you sure this is essential to boot ntfs drives?

do i do this?



sudo ntfs-3g /dev/$part /mnt/$mountpoint -o force

[Zhivargo]

Boot Info Script 0.55 dated February 15th, 2010

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

=> Grub 2 is installed in the MBR of /dev/sda and looks on the same drive in
partition #1 for (,msdos1)/grub.

sda1: __________________________________________________ _______________________

File system: ext3
Boot sector type: Grub 2
Boot sector info: Grub 2 is installed in the boot sector of sda1 and
looks at sector 46082 of the same hard drive for
core.img, but core.img can not be found at this
location.
Operating System:
Boot files/dirs: /grub/grub.cfg /grub/core.img

sda2: __________________________________________________ _______________________

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

sda5: __________________________________________________ _______________________

File system: ext4
Boot sector type: -
Boot sector info:
Operating System: Ubuntu 10.10
Boot files/dirs: /etc/fstab

sda6: __________________________________________________ _______________________

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

sda7: __________________________________________________ _______________________

File system: swap
Boot sector type: -
Boot sector info:

sda3: __________________________________________________ _______________________

File system: ntfs
Boot sector type: Windows Vista/7
Boot sector info: No errors found in the Boot Parameter Block.
Operating System: Windows 7
Boot files/dirs: /bootmgr /Boot/BCD /Windows/System32/winload.exe

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

Drive: sda ___________________ __________________________________________________ ___

Disk /dev/sda: 2000.4 GB, 2000398934016 bytes
255 heads, 63 sectors/track, 243201 cylinders, total 3907029168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes

Partition Boot Start End Size Id System

/dev/sda1 * 2,048 391,167 389,120 83 Linux
/dev/sda2 393,214 2,062,891,007 2,062,497,794 5 Extended
/dev/sda5 393,216 98,047,999 97,654,784 83 Linux
/dev/sda6 98,050,048 2,051,172,351 1,953,122,304 83 Linux
/dev/sda7 2,051,174,400 2,062,891,007 11,716,608 82 Linux swap / Solaris
/dev/sda3 2,062,891,008 3,086,891,007 1,024,000,000 7 HPFS/NTFS


blkid -c /dev/null: __________________________________________________ __________

Device UUID TYPE LABEL

/dev/sda1 18a21fa6-9604-45e0-b163-2fbd236cfbca ext3
/dev/sda2: PTTYPE="dos"
/dev/sda3 39CA80726F3EFF7F ntfs
/dev/sda5 09237179-aed5-4889-9ce2-bdb39f2ca6b3 ext4
/dev/sda6 f2e4d2a1-4eae-48c6-a329-9422ea25367d ext4
/dev/sda7 96f160d0-8664-457b-8f26-9a3a239ec7f4 swap
/dev/sda: PTTYPE="dos"

============================ "mount | grep ^/dev output: ===========================

Device Mount_Point Type Options

/dev/sda5 / ext4 (rw,errors=remount-ro,commit=0)
/dev/sda1 /boot ext3 (rw,commit=0)
/dev/sda6 /home ext4 (rw,commit=0)


============================= sda1/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 $prefix/grubenv ]; then
set have_grubenv=true
load_env
fi
set default="0"
if [ "${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 recordfail {
set recordfail=1
if [ -n "${have_grubenv}" ]; then if [ -z "${boot_once}" ]; then save_env recordfail; fi; fi
}

function load_video {
insmod vbe
insmod vga
}

insmod part_msdos
insmod ext2
set root='(hd0,msdos5)'
search --no-floppy --fs-uuid --set 09237179-aed5-4889-9ce2-bdb39f2ca6b3
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='(hd0,msdos1)'
search --no-floppy --fs-uuid --set 18a21fa6-9604-45e0-b163-2fbd236cfbca
set locale_dir=($root)/grub/locale
set lang=en
insmod gettext
if [ "${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/light-gray
### END /etc/grub.d/05_debian_theme ###

### BEGIN /etc/grub.d/10_linux ###
menuentry 'Ubuntu, with Linux 2.6.35-25-generic' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
insmod part_msdos
insmod ext2
set root='(hd0,msdos1)'
search --no-floppy --fs-uuid --set 18a21fa6-9604-45e0-b163-2fbd236cfbca
linux /vmlinuz-2.6.35-25-generic root=UUID=09237179-aed5-4889-9ce2-bdb39f2ca6b3 ro quiet splash
initrd /initrd.img-2.6.35-25-generic
}
menuentry 'Ubuntu, with Linux 2.6.35-25-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
insmod part_msdos
insmod ext2
set root='(hd0,msdos1)'
search --no-floppy --fs-uuid --set 18a21fa6-9604-45e0-b163-2fbd236cfbca
echo 'Loading Linux 2.6.35-25-generic ...'
linux /vmlinuz-2.6.35-25-generic root=UUID=09237179-aed5-4889-9ce2-bdb39f2ca6b3 ro single
echo 'Loading initial ramdisk ...'
initrd /initrd.img-2.6.35-25-generic
}
menuentry 'Ubuntu, with Linux 2.6.35-22-generic' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
insmod part_msdos
insmod ext2
set root='(hd0,msdos1)'
search --no-floppy --fs-uuid --set 18a21fa6-9604-45e0-b163-2fbd236cfbca
linux /vmlinuz-2.6.35-22-generic root=UUID=09237179-aed5-4889-9ce2-bdb39f2ca6b3 ro quiet splash
initrd /initrd.img-2.6.35-22-generic
}
menuentry 'Ubuntu, with Linux 2.6.35-22-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
insmod part_msdos
insmod ext2
set root='(hd0,msdos1)'
search --no-floppy --fs-uuid --set 18a21fa6-9604-45e0-b163-2fbd236cfbca
echo 'Loading Linux 2.6.35-22-generic ...'
linux /vmlinuz-2.6.35-22-generic root=UUID=09237179-aed5-4889-9ce2-bdb39f2ca6b3 ro single
echo 'Loading initial ramdisk ...'
initrd /initrd.img-2.6.35-22-generic
}
### END /etc/grub.d/10_linux ###

### BEGIN /etc/grub.d/11_Windows ###
menuentry "Windows 7" {
set root=(hd0,3)
chainloader (hd0,3)+1
}
### END /etc/grub.d/11_Windows ###

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

### BEGIN /etc/grub.d/20_memtest86+ ###
menuentry "Memory test (memtest86+)" {
insmod part_msdos
insmod ext2
set root='(hd0,msdos1)'
search --no-floppy --fs-uuid --set 18a21fa6-9604-45e0-b163-2fbd236cfbca
linux16 /memtest86+.bin
}
menuentry "Memory test (memtest86+, serial console 115200)" {
insmod part_msdos
insmod ext2
set root='(hd0,msdos1)'
search --no-floppy --fs-uuid --set 18a21fa6-9604-45e0-b163-2fbd236cfbca
linux16 /memtest86+.bin console=ttyS0,115200n8
}
### END /etc/grub.d/20_memtest86+ ###

### BEGIN /etc/grub.d/30_os-prober ###
menuentry "Windows 7 (loader) (on /dev/sda3)" {
insmod part_msdos
insmod ntfs
set root='(hd0,msdos3)'
search --no-floppy --fs-uuid --set 39ca80726f3eff7f
chainloader +1
}
### 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 ###

=================== sda1: Location of files loaded by Grub: ===================


.0GB: grub/core.img
.0GB: grub/grub.cfg
.0GB: initrd.img-2.6.35-22-generic
.0GB: initrd.img-2.6.35-25-generic
.0GB: vmlinuz-2.6.35-22-generic
.0GB: vmlinuz-2.6.35-25-generic

=============================== sda5/etc/fstab: ===============================

# /etc/fstab: static file system information.
#
# Use 'blkid -o value -s UUID' to print the universally unique identifier
# for a device; this may be used with UUID= as a more robust way to name
# devices that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
proc /proc proc nodev,noexec,nosuid 0 0
# / was on /dev/sda5 during installation
UUID=09237179-aed5-4889-9ce2-bdb39f2ca6b3 / ext4 errors=remount-ro 0 1
# /boot was on /dev/sda1 during installation
UUID=18a21fa6-9604-45e0-b163-2fbd236cfbca /boot ext3 defaults 0 2
# /home was on /dev/sda6 during installation
UUID=f2e4d2a1-4eae-48c6-a329-9422ea25367d /home ext4 defaults 0 2
# swap was on /dev/sda7 during installation
UUID=96f160d0-8664-457b-8f26-9a3a239ec7f4 none swap sw 0 0

=================== sda5: Location of files loaded by Grub: ===================


.2GB: initrd.img
.2GB: initrd.img.old
.2GB: vmlinuz
.2GB: vmlinuz.old

[oldfred]

I do not see anything in boot script that looks like it would prevent you from booting windows.

Grub does not use boot flag, but windows does. If you revert to a windows boot loader or want to do repairs on windows you will need to move the boot flag to sda3.

set boot flag on for sda3 (off on others)
sudo sfdisk -A3 /dev/sda

You also have a copy of grub2 in the partition boot sector of sda1, but the boot sector is not normally used by grub2. (Boot sector is used by windows.)

Grub2's osprober has added its standard boot stanza, does that work?