I tried to follow the reinstall way but I get this.
ubuntu@ubuntu:~$ sudo grub-install --root-directory=/mnt/ /dev/sda1
The file /mnt//boot/grub/stage1 not read correctly.
I have checked and there is a stage1 file at /mtn/boot/grub/stage1.
Pasting the results from the boot info script in case it helps
-----------------------------------------------------------------------------------------------
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 #256 for /boot/burg.
=> Syslinux is installed in the MBR of /dev/sdb
sda1: __________________________________________________ _______________________
File system: ntfs
Boot sector type: Windows Vista/7
Boot sector info: No errors found in the Boot Parameter Block.
Operating System:
Boot files/dirs: /bootmgr /Boot/BCD
sda2: __________________________________________________ _______________________
File system: ntfs
Boot sector type: Windows Vista/7
Boot sector info: No errors found in the Boot Parameter Block.
Operating System:
Boot files/dirs: /ubuntu/winboot/wubildr.mbr /ubuntu/winboot/wubildr
/ubuntu/disks/root.disk /ubuntu/disks/swap.disk
sda2/Wubi: __________________________________________________ _______________________
File system: ext4
Boot sector type: -
Boot sector info:
Operating System: Ubuntu 10.10
Boot files/dirs: /boot/grub/grub.cfg /etc/fstab
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: /Windows/System32/winload.exe /wubildr.mbr /wubildr
sdb1: __________________________________________________ _______________________
File system: vfat
Boot sector type: Fat32
Boot sector info: No errors found in the Boot Parameter Block.
Operating System:
Boot files/dirs: /boot/grub/grub.cfg
=========================== Drive/Partition Info: =============================
Drive: sda ___________________ __________________________________________________ ___
Disk /dev/sda: 320.1 GB, 320072933376 bytes
255 heads, 63 sectors/track, 38913 cylinders, total 625142448 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 * 2,048 206,847 204,800 7 HPFS/NTFS
/dev/sda2 206,848 502,259,711 502,052,864 7 HPFS/NTFS
/dev/sda3 502,259,712 625,139,711 122,880,000 7 HPFS/NTFS
Drive: sdb ___________________ __________________________________________________ ___
Disk /dev/sdb: 16.0 GB, 16001036288 bytes
32 heads, 63 sectors/track, 15501 cylinders, total 31252024 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
Partition Boot Start End Size Id System
/dev/sdb1 * 63 31,250,015 31,249,953 b W95 FAT32
blkid -c /dev/null: __________________________________________________ __________
Device UUID TYPE LABEL
/dev/loop0 squashfs
/dev/loop1 670693f3-1946-4c5b-b6d8-c3909230e25a ext4
/dev/sda1 5EDA2E36DA2E0ABB ntfs
/dev/sda2 C80A0DB10A0D9E16 ntfs
/dev/sda3 26D45351D45321FB ntfs
/dev/sda: PTTYPE="dos"
/dev/sdb1 3AF6-6C42 vfat KINGSTON
/dev/sdb: PTTYPE="dos"
============================ "mount | grep ^/dev output: ===========================
Device Mount_Point Type Options
aufs / aufs (rw)
/dev/sdb1 /cdrom vfat (ro,noatime,fmask=0022,dmask=0022,codepage=cp437,i ocharset=iso8859-1,shortname=mixed,errors=remount-ro)
/dev/loop0 /rofs squashfs (ro,noatime)
/dev/sda1 /mnt fuseblk (rw,nosuid,nodev,allow_other,blksize=4096)
/dev/sda3 /media/disk fuseblk (rw,nosuid,nodev,allow_other,blksize=4096)
=================== sda1: Location of files loaded by Grub: ===================
??GB: boot/grub/stage2
======================== sda2/Wubi/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 $prefix/grubenv ]; then
set have_grubenv=true
load_env
fi
set default="0"
if [ "${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 "${boot_once}" ]; then save_env recordfail; fi; fi
}
function load_video {
}
if [ "${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 ###
### END /etc/grub.d/10_linux ###
### BEGIN /etc/grub.d/10_lupin ###
menuentry "Ubuntu, Linux 2.6.35-22-generic" {
insmod part_msdos
insmod ntfs
set root='(hd0,msdos2)'
search --no-floppy --fs-uuid --set c80a0db10a0d9e16
loopback loop0 /ubuntu/disks/root.disk
set root=(loop0)
linux /boot/vmlinuz-2.6.35-22-generic root=/dev/sda2 loop=/ubuntu/disks/root.disk ro splash vga=773 quiet splash
initrd /boot/initrd.img-2.6.35-22-generic
}
menuentry "Ubuntu, Linux 2.6.35-22-generic (recovery mode)" {
insmod part_msdos
insmod ntfs
set root='(hd0,msdos2)'
search --no-floppy --fs-uuid --set c80a0db10a0d9e16
loopback loop0 /ubuntu/disks/root.disk
set root=(loop0)
linux /boot/vmlinuz-2.6.35-22-generic root=/dev/sda2 loop=/ubuntu/disks/root.disk ro single splash vga=773
initrd /boot/initrd.img-2.6.35-22-generic
}
menuentry "Ubuntu, Linux 2.6.32-25-generic" {
insmod part_msdos
insmod ntfs
set root='(hd0,msdos2)'
search --no-floppy --fs-uuid --set c80a0db10a0d9e16
loopback loop0 /ubuntu/disks/root.disk
set root=(loop0)
linux /boot/vmlinuz-2.6.32-25-generic root=/dev/sda2 loop=/ubuntu/disks/root.disk ro splash vga=773 quiet splash
initrd /boot/initrd.img-2.6.32-25-generic
}
menuentry "Ubuntu, Linux 2.6.32-25-generic (recovery mode)" {
insmod part_msdos
insmod ntfs
set root='(hd0,msdos2)'
search --no-floppy --fs-uuid --set c80a0db10a0d9e16
loopback loop0 /ubuntu/disks/root.disk
set root=(loop0)
linux /boot/vmlinuz-2.6.32-25-generic root=/dev/sda2 loop=/ubuntu/disks/root.disk ro single splash vga=773
initrd /boot/initrd.img-2.6.32-25-generic
}
### END /etc/grub.d/10_lupin ###
### BEGIN /etc/grub.d/20_linux_xen ###
### END /etc/grub.d/20_linux_xen ###
### BEGIN /etc/grub.d/20_memtest86+ ###
### END /etc/grub.d/20_memtest86+ ###
### BEGIN /etc/grub.d/30_os-prober ###
menuentry "Windows 7 (loader) (on /dev/sda1)" {
insmod part_msdos
insmod ntfs
set root='(hd0,msdos1)'
search --no-floppy --fs-uuid --set 5eda2e36da2e0abb
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 ###
============================= sda2/Wubi/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
/host/ubuntu/disks/root.disk / ext4 loop,errors=remount-ro 0 1
/host/ubuntu/disks/swap.disk none swap loop,sw 0 0
================= sda2/Wubi: Location of files loaded by Grub: =================
3.2GB: boot/grub/grub.cfg
3.2GB: boot/initrd.img-2.6.32-25-generic
7.1GB: boot/initrd.img-2.6.35-22-generic
4.7GB: boot/vmlinuz-2.6.32-25-generic
4.7GB: boot/vmlinuz-2.6.35-22-generic
7.1GB: initrd.img
3.2GB: initrd.img.old
4.7GB: vmlinuz
4.7GB: vmlinuz.old
=========================== sdb1/boot/grub/grub.cfg: ===========================
if loadfont /boot/grub/font.pf2 ; then
set gfxmode=auto
insmod efi_gop
insmod efi_uga
insmod gfxterm
terminal_output gfxterm
fi
set menu_color_normal=white/black
set menu_color_highlight=black/light-gray
menuentry "Start Kubuntu" {
set gfxpayload=keep
linux /casper/vmlinuz file=/cdrom/preseed/kubuntu.seed boot=casper maybe-ubiquity quiet splash --
initrd /casper/initrd.lz
}
menuentry "Check disc for defects" {
set gfxpayload=keep
linux /casper/vmlinuz boot=casper integrity-check quiet splash --
initrd /casper/initrd.lz
}
=================== sdb1: Location of files loaded by Grub: ===================
??GB: boot/grub/grub.cfg