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我的系统9.04，grub2开机时无法引导Windows，出现Invalid Signature.不知道如何处理，下面贴上我的fdisk -l的输出和grub.cfg的内容，请大家帮忙分析一下。谢谢。

Disk /dev/sda: 250.0 GB, 250059350016 bytes
255 heads, 63 sectors/track, 30401 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x1ba41ba3

Device Boot Start End Blocks Id System
/dev/sda1 * 1 3824 30716248+ 7 HPFS/NTFS
/dev/sda2 3825 30401 213479752+ f W95 Ext'd (LBA)
/dev/sda5 3825 14278 83971723+ 7 HPFS/NTFS
/dev/sda6 14279 30401 129507966 7 HPFS/NTFS

Disk /dev/sdb: 120.0 GB, 120034123776 bytes
255 heads, 63 sectors/track, 14593 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0xf0b1ebb0

Device Boot Start End Blocks Id System
/dev/sdb1 * 1 6079 48829536 83 Linux
/dev/sdb2 6080 14593 68388705 5 Extended
/dev/sdb5 14220 14593 3004123+ 82 Linux swap / Solaris
/dev/sdb6 6080 14219 65384487 83 Linux

Partition table entries are not in disk order

grub.cfg:

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

### BEGIN /etc/grub.d/00_header ###
set default=0
set timeout=5
set root=(hd1,1)
search --fs-uuid --set 612fbd89-a184-4d04-9ab8-ddd3627e8bc4
if font /usr/share/grub/unicode.pff ; then
set gfxmode=1024x768
insmod gfxterm
insmod vbe
insmod png
insmod jpeg
insmod tga
terminal gfxterm
background_image /boot/grub/grub.png
fi
### END /etc/grub.d/00_header ###

### BEGIN /etc/grub.d/05_debian_theme ###
set menu_color_normal=white/black
set menu_color_highlight=white/black
### END /etc/grub.d/05_debian_theme ###

### BEGIN /etc/grub.d/10_hurd ###
### END /etc/grub.d/10_hurd ###

### BEGIN /etc/grub.d/10_linux ###
set root=(hd1,1)
search --fs-uuid --set 612fbd89-a184-4d04-9ab8-ddd3627e8bc4
menuentry "Ubuntu, linux 2.6.28-15-generic" {
linux /boot/vmlinuz-2.6.28-15-generic root=UUID=612fbd89-a184-4d04-9ab8-ddd3627e8bc4 ro quiet splash
initrd /boot/initrd.img-2.6.28-15-generic
}
menuentry "Ubuntu, linux 2.6.28-15-generic (single-user mode)" {
linux /boot/vmlinuz-2.6.28-15-generic root=UUID=612fbd89-a184-4d04-9ab8-ddd3627e8bc4 ro single
initrd /boot/initrd.img-2.6.28-15-generic
}
### END /etc/grub.d/10_linux ###

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

### BEGIN /etc/grub.d/30_os-prober ###
menuentry "Microsoft Windows XP Professional (on /dev/sda1)" {
set root=(hd0,1)
chainloader +1
}
### END /etc/grub.d/30_os-prober ###

### BEGIN /etc/grub.d/40_custom ###
# This file is an example on how to add custom entries
### END /etc/grub.d/40_custom ###

问题是怎么出现的呢？是升级到grub2呢还是其它原因呢？Ubuntu启动没有问题吗？

Ubuntu启动没有问题，就是WIndows现在启动不了。

问题应该是GRUB2的安装导致的。

估计是引导设置的问题，楼主再研究研究，不可能出这种低级错误，要知道哥伦布2代本来就是要替代1代产品的，如果连双系统都搞不定，拿什么替代。
不过据说哥伦布2代和部分主板Bios不兼容，如果万一你的主板在这之列，就很不幸了，只有用1代或者哥伦布4dos了。
又看了一下，你是双硬盘的引导，好象前几天有人问过类似的问题，请教下smallapple，他好象比较擅长双硬盘引导。

看来不说话不行了.....

在装grub2之前的grub启动正常吗？windwos是什么格式，ntfs？grub是不是装在sda？
如果正常试试这个

5楼的老兄，非常感激，完全正确

tadpole128 写了：5楼的老兄，非常感激，完全正确

ls这位搞定了，可lz好象还没解决。

下面这个帖子中6楼提供的grub2是我见到的功能最好的，支持drivemap，能够引导windows。
viewtopic.php?f=139&t=223150

我也有与楼主类似的问题，GRUB2启动的时候根本不显示选项，grub.cfg如下：

#
# 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 ###
load_env
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=(hd0,4)
search --no-floppy --fs-uuid --set e320c46c-e8d5-4ec3-b563-c191f3ef4294
if loadfont /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
set timeout=10
### 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 2.6.31-9-generic" {
set quiet=1
insmod ext2
set root=(hd0,3)
search --no-floppy --fs-uuid --set eec5d1cd-5d27-466b-ad19-65e2168b6674
linux /boot/vmlinuz-2.6.31-9-generic root=UUID=eec5d1cd-5d27-466b-ad19-65e2168b6674 ro quiet
initrd /boot/initrd.img-2.6.31-9-generic
}
menuentry "Ubuntu, Linux 2.6.31-9-generic (recovery mode)" {
insmod ext2
set root=(hd0,3)
search --no-floppy --fs-uuid --set eec5d1cd-5d27-466b-ad19-65e2168b6674
linux /boot/vmlinuz-2.6.31-9-generic root=UUID=eec5d1cd-5d27-466b-ad19-65e2168b6674 ro single
initrd /boot/initrd.img-2.6.31-9-generic
}
menuentry "Ubuntu, Linux 2.6.31-8-generic" {
set quiet=1
insmod ext2
set root=(hd0,3)
search --no-floppy --fs-uuid --set eec5d1cd-5d27-466b-ad19-65e2168b6674
linux /boot/vmlinuz-2.6.31-8-generic root=UUID=eec5d1cd-5d27-466b-ad19-65e2168b6674 ro quiet
initrd /boot/initrd.img-2.6.31-8-generic
}
menuentry "Ubuntu, Linux 2.6.31-8-generic (recovery mode)" {
insmod ext2
set root=(hd0,3)
search --no-floppy --fs-uuid --set eec5d1cd-5d27-466b-ad19-65e2168b6674
linux /boot/vmlinuz-2.6.31-8-generic root=UUID=eec5d1cd-5d27-466b-ad19-65e2168b6674 ro single
initrd /boot/initrd.img-2.6.31-8-generic
}
menuentry "Ubuntu, Linux 2.6.31-3-generic" {
set quiet=1
insmod ext2
set root=(hd0,3)
search --no-floppy --fs-uuid --set eec5d1cd-5d27-466b-ad19-65e2168b6674
linux /boot/vmlinuz-2.6.31-3-generic root=UUID=eec5d1cd-5d27-466b-ad19-65e2168b6674 ro quiet
initrd /boot/initrd.img-2.6.31-3-generic
}
menuentry "Ubuntu, Linux 2.6.31-3-generic (recovery mode)" {
insmod ext2
set root=(hd0,3)
search --no-floppy --fs-uuid --set eec5d1cd-5d27-466b-ad19-65e2168b6674
linux /boot/vmlinuz-2.6.31-3-generic root=UUID=eec5d1cd-5d27-466b-ad19-65e2168b6674 ro single
initrd /boot/initrd.img-2.6.31-3-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 ###
if keystatus; then
if keystatus --shift; then
set timeout=-1
else
set timeout=0
fi
else
if sleep --interruptible 3 ; then
set timeout=0
fi
fi
### END /etc/grub.d/30_os-prober ###

### BEGIN /etc/grub.d/30_otheros ###

# This entry automatically added by the Debian installer for a non-linux OS
# on /dev/sda1
menuentry "Windows NT/2000/XP (loader)" {
# set root=(hd0,1)
# search --no-floppy --fs-uuid --set 88bf-fbdf
# drivemap -s (hd0) $root
# chainloader +1
menuentry "Microsoft Windows XP Professional (on /dev/sda1)" {
insmod ntfs
search -f /ntldr --set root
chainloader +1
}
}

# This entry automatically added by the Debian installer for a non-linux OS
# on /dev/sda5
menuentry "Windows NT/2000/XP (loader)" {
set root=(hd0,5)
search --no-floppy --fs-uuid --set b6e4ba75e4ba3787
drivemap -s (hd0) $root
chainloader +1
}
### END /etc/grub.d/30_otheros ###

### BEGIN /etc/grub.d/40_custom ###
# This file is an example on how to add custom entries
### END /etc/grub.d/40_custom ###

加粗的地方是根据5楼的提示改的，改过后启动依然没有选项，并提示："no such driver"，后面是一串数值，像是硬盘的ID。


硬盘的分区如下：
Disk /dev/sda: 160.0 GB, 160041885696 bytes
255 heads, 63 sectors/track, 19457 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0xf0b1ebb0

Device Boot Start End Blocks Id System
/dev/sda1 1 638 5124703+ b W95 FAT32
/dev/sda2 639 18038 139765500 f W95 Ext'd (LBA)
/dev/sda3 * 18039 18889 6835657+ 83 Linux
/dev/sda4 18890 19457 4562460 83 Linux
/dev/sda5 639 13387 102406311 7 HPFS/NTFS
/dev/sda6 13388 13790 3237066 7 HPFS/NTFS
/dev/sda7 13791 13973 1469916 82 Linux swap / Solaris
/dev/sda8 13974 18038 32652081 83 Linux

把这一段删除
### BEGIN /etc/grub.d/30_os-prober ###
if keystatus; then
if keystatus --shift; then
set timeout=-1
else
set timeout=0
fi
else
if sleep --interruptible 3 ; then
set timeout=0
fi
fi
### END /etc/grub.d/30_os-prober ###

从
### BEGIN /etc/grub.d/30_otheros ###
到
### END /etc/grub.d/30_otheros ###
改为:
### BEGIN /etc/grub.d/30_otheros ###

# This entry automatically added by the Debian installer for a non-linux OS
# on /dev/sda1
menuentry "Windows NT/2000/XP (loader)" {
insmod ntfs
set root=(hd0,1)
chainloader +1
}
# This entry automatically added by the Debian installer for a non-linux OS
# on /dev/sda5
menuentry "Windows NT/2000/XP (loader)" {
set root=(hd0,5)
search --no-floppy --fs-uuid --set b6e4ba75e4ba3787
drivemap -s (hd0) $root
chainloader +1
}
### END /etc/grub.d/30_otheros ###

你的D盘是不是还有一个windows系统？

grub2 好复杂啊，chainloader 之前还要 insmod ntfs，你架构倒是好看了，给用户多少麻烦，还真当自己是操作系统了。

回复真快啊，D盘没有windows，但是有几个WIN的系统文件（BOOT.INI,NTDETECT.COM,NTLDR，以前备份的），估计是GRUB认为有WIN系统。

那修改部分就改成这样
从
### BEGIN /etc/grub.d/30_otheros ###
到
### END /etc/grub.d/30_otheros ###
改为:


### BEGIN /etc/grub.d/30_otheros ###

# This entry automatically added by the Debian installer for a non-linux OS
# on /dev/sda1
menuentry "Windows NT/2000/XP (loader)" {
set root=(hd0,1)
chainloader +1
}
### END /etc/grub.d/30_otheros ###

C盘是FAT32的，不用加ntfs.mod

惨了，现在不能引导了，operating system not found.

关键是那个启动时的选项为什么没有出来？