[SOLVED] Grub 2 gives Error: Invalid Signature

Question

Hello everyone.
I am trying to dual boot Arch and Windows 7. I am boot into Arch with no problem but when I select Windows 7; I am greeted with the 'Error: Invalid Signature' and redirects back to the Grub 2 menu.
I have googled and have tried many times, so I thought I would come to the endless supply of knowledge of the bbs.archlinux forums.
I can boot into Windows when I have it as the first boot drive in the BIOS, so I Windows is fine. It's got to be one simple step I'm missing here.
P.S. I really wasn't sure where to put this post.
I'll go ahead and list some (hopefully) useful information:
sudo fdisk -l
Disk /dev/sdc: 500.1 GB, 500107862016 bytes, 976773168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x00000000
Device Boot Start End Blocks Id System
/dev/sdc1 * 63 1992059 995998+ 83 Linux
Partition 1 does not start on physical sector boundary.
/dev/sdc2 1992060 9992429 4000185 82 Linux swap / Solaris
Partition 2 does not start on physical sector boundary.
/dev/sdc3 9992430 976773167 483390369 83 Linux
Partition 3 does not start on physical sector boundary.
Disk /dev/sdb: 1000.2 GB, 1000204886016 bytes, 1953525168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0ca96061
Device Boot Start End Blocks Id System
/dev/sdb1 * 2048 1953521663 976759808 7 HPFS/NTFS/exFAT
Disk /dev/sda: 60.0 GB, 60022480896 bytes, 117231408 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x4df1d31e
Device Boot Start End Blocks Id System
/dev/sda1 2048 117227519 58612736 7 HPFS/NTFS/exFAT
Where /dev/sda is Windows
           /dev/sdb is an extra disk that holds music and documents
           /dev/sdc is Arch
                   sdc1 is /boot
                   sdc2 is swap
                   sdc3 is root
Also my BIOS are set up to boot the Arch disk, then Windows, and final the extra disk.
/etc/grub.d/40_custom:
#!/bin/sh
exec tail -n +3 $0
# 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.
menuentry "Windows 7" {
set root=(hd0,1)
drivemap -s (hd0) (hd1)
chainloader +1
/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 ###
insmod part_gpt
insmod part_msdos
if [ -s $prefix/grubenv ]; then
load_env
fi
set default="0"
if [ x"${feature_menuentry_id}" = xy ]; then
menuentry_id_option="--id"
else
menuentry_id_option=""
fi
export menuentry_id_option
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 {
if [ x$feature_all_video_module = xy ]; then
insmod all_video
else
insmod efi_gop
insmod efi_uga
insmod ieee1275_fb
insmod vbe
insmod vga
insmod video_bochs
insmod video_cirrus
fi
if [ x$feature_default_font_path = xy ] ; then
font=unicode
else
insmod part_msdos
insmod ext2
set root='hd2,msdos3'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd2,msdos3 --hint-efi=hd2,msdos3 --hint-baremetal=ahci2,msdos3 c15450d4-4fe6-4124-aa4e-a6419188845b
else
search --no-floppy --fs-uuid --set=root c15450d4-4fe6-4124-aa4e-a6419188845b
fi
font="/usr/share/grub/unicode.pf2"
fi
if loadfont $font ; then
set gfxmode=auto
load_video
insmod gfxterm
fi
terminal_input console
terminal_output gfxterm
set timeout=5
### END /etc/grub.d/00_header ###
### BEGIN /etc/grub.d/10_linux ###
menuentry 'Arch GNU/Linux, with Linux core repo kernel' --class arch --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-core repo kernel-true-c15450d4-4fe6-4124-aa4e-a6419188845b' {
load_video
set gfxpayload=keep
insmod gzio
insmod part_msdos
insmod ext2
set root='hd2,msdos1'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd2,msdos1 --hint-efi=hd2,msdos1 --hint-baremetal=ahci2,msdos1 4637508e-7f78-4f2d-9cd7-90868f1de62f
else
search --no-floppy --fs-uuid --set=root 4637508e-7f78-4f2d-9cd7-90868f1de62f
fi
echo 'Loading Linux core repo kernel ...'
linux /vmlinuz-linux root=UUID=c15450d4-4fe6-4124-aa4e-a6419188845b ro quiet
echo 'Loading initial ramdisk ...'
initrd /initramfs-linux.img
menuentry 'Arch GNU/Linux, with Linux core repo kernel (Fallback initramfs)' --class arch --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-core repo kernel-fallback-c15450d4-4fe6-4124-aa4e-a6419188845b' {
load_video
set gfxpayload=keep
insmod gzio
insmod part_msdos
insmod ext2
set root='hd2,msdos1'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd2,msdos1 --hint-efi=hd2,msdos1 --hint-baremetal=ahci2,msdos1 4637508e-7f78-4f2d-9cd7-90868f1de62f
else
search --no-floppy --fs-uuid --set=root 4637508e-7f78-4f2d-9cd7-90868f1de62f
fi
echo 'Loading Linux core repo kernel ...'
linux /vmlinuz-linux root=UUID=c15450d4-4fe6-4124-aa4e-a6419188845b ro quiet
echo 'Loading initial ramdisk ...'
initrd /initramfs-linux-fallback.img
### END /etc/grub.d/10_linux ###
### 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 ###
### 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.
menuentry "Windows 7" {
set root=(hd0,1)
drivemap -s (hd0) (hd1)
chainloader +1
### END /etc/grub.d/40_custom ###
### BEGIN /etc/grub.d/41_custom ###
if [ -f ${config_directory}/custom.cfg ]; then
source ${config_directory}/custom.cfg
elif [ -z "${config_directory}" -a -f $prefix/custom.cfg ]; then
source $prefix/custom.cfg;
fi
### END /etc/grub.d/41_custom ###
Thanks in Advance for anyone that is willing to help. Let me know if you need anymore information.
I am going to keep on researching and trying.
Last edited by pjk1939 (2012-12-02 23:22:35)

Answer 1

Alright everyone I got it working. I will show what I did and mark as solved.
For some reason, that I do not know the answer too, the Window's bootloader was on my extra harddrive /dev/sdb1 as opposed to /dev/sda1, where my Windows partion actually is. I'm not sure what I did to do that or if that is just is just how Windows works.
my /etc/grub/40_custom:
#!/bin/sh
exec tail -n +3 $0
# 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.
menuentry "Windows 7" {
insmod ntfs
set root=(hd0,1)
search --no-floppy --fs-uuid --set BE4CA71B4CA6CD89
chainloader +1
I added in the
insmod ntfs
and
search --no-floppy --fs-uuid --set BE4CA71B4CA6CD89
so that it would boot from the /dev/sdb1 drive.
I found the UUID by running the command:
sudo blkid