很多人都懂一些简单的电脑系统问题的操作方案，但是win7系统ubuntu 12.04 xp双盘3系统grub配置的问题思路却鲜为人知，小编前几天就遇到了win7系统ubuntu 12.04 xp双盘3系统grub配置的问题，于是才准备整理win7系统ubuntu 12.04 xp双盘3系统grub配置的技巧思路，其实只需要按照即在/boot/grub/grub.cfg中添加如下内容即可的步骤即可，大家一起来看看小编整理的win7系统ubuntu 12.04 xp双盘3系统grub配置的突破方法：
盘1: ubuntu12.04 win7
盘2: xp
sudo update-grub 的结果只有win7 和 ubuntu,点击win7进入系统，看到了win7和xp,win7可以启动，但是xp不能。于是在网上搜索找到了一个别人的xp和ubuntu共存的grub文件。
发现我的少了一句话，drivemap -s (hd0) ${root},于是加上就ok了。
即在/boot/grub/grub.cfg中添加如下内容即可
menuentry "Windows xp" --class windows --class os {
insmod ntfs
set root='(hd0,1)'
search --no-floppy --fs-uuid --set=root 4C844B34844B2036
drivemap -s (hd0) ${root}
chainloader +1
}
set root=(hd0,1)，代表第0块磁盘的第一个分区，其中硬盘号是从0开始，分区号是从1开始。我的xp是在第0个分区。我的xp和ubuntu不再同一个磁盘，grub中ubuntu显示在hd1所以xp必然在hd0,而系统在c:盘，所以是第一个分区
整个的grub文件如下：
#
# 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 "${boot_once}" ]; then save_env recordfail; fi; fi
}
function load_video {
insmod vbe
insmod vga
insmod video_bochs
insmod video_cirrus
}
insmod part_msdos
insmod ext2
set root='(hd1,msdos6)'
search --no-floppy --fs-uuid --set=root 2636856c-62cc-4195-8995-148eb8cfb30c
if loadfont /usr/share/grub/unicode.pf2 ; then
set gfxmode=auto
load_video
insmod gfxterm
insmod part_msdos
insmod ext2
set root='(hd1,msdos6)'
search --no-floppy --fs-uuid --set=root 2636856c-62cc-4195-8995-148eb8cfb30c
set locale_dir=($root)/boot/grub/locale
set lang=zh_CN
insmod gettext
fi
terminal_output gfxterm
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
if background_color 44,0,30; then
clear
fi
### END /etc/grub.d/05_debian_theme ###
### BEGIN /etc/grub.d/10_linux ###
function gfxmode {
set gfxpayload="$1"
if [ "$1" = "keep" ]; then
set vt_handoff=vt.handoff=7
else
set vt_handoff=
fi
}
if [ ${recordfail} != 1 ]; then
if [ -e ${prefix}/gfxblacklist.txt ]; then
if hwmatch ${prefix}/gfxblacklist.txt 3; then
if [ ${match} = 0 ]; then
set linux_gfx_mode=keep
else
set linux_gfx_mode=text
fi
else
set linux_gfx_mode=text
fi
else
set linux_gfx_mode=keep
fi
else
set linux_gfx_mode=text
fi
export linux_gfx_mode
if [ "$linux_gfx_mode" != "text" ]; then load_video; fi
menuentry 'Ubuntu,Linux 3.2.0-23-generic-pae' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
gfxmode $linux_gfx_mode
insmod gzio
insmod part_msdos
insmod ext2
set root='(hd1,msdos6)'
search --no-floppy --fs-uuid --set=root 2636856c-62cc-4195-8995-148eb8cfb30c
linux /boot/vmlinuz-3.2.0-23-generic-pae root=UUID=2636856c-62cc-4195-8995-148eb8cfb30c ro quiet splash $vt_handoff
initrd /boot/initrd.img-3.2.0-23-generic-pae
}
menuentry 'Ubuntu,Linux 3.2.0-23-generic-pae (恢复模式)' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
insmod gzio
insmod part_msdos
insmod ext2
set root='(hd1,msdos6)'
search --no-floppy --fs-uuid --set=root 2636856c-62cc-4195-8995-148eb8cfb30c
echo '载入 Linux 3.2.0-23-generic-pae …'
linux /boot/vmlinuz-3.2.0-23-generic-pae root=UUID=2636856c-62cc-4195-8995-148eb8cfb30c ro recovery nomodeset
echo '载入初始化内存盘…'
initrd /boot/initrd.img-3.2.0-23-generic-pae
}
### 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+ ###
menuentry "Memory test (memtest86+)" {
insmod part_msdos
insmod ext2
set root='(hd1,msdos6)'
search --no-floppy --fs-uuid --set=root 2636856c-62cc-4195-8995-148eb8cfb30c
linux16 /boot/memtest86+.bin
}
menuentry "Memory test (memtest86+, serial console 115200)" {
insmod part_msdos
insmod ext2
set root='(hd1,msdos6)'
search --no-floppy --fs-uuid --set=root 2636856c-62cc-4195-8995-148eb8cfb30c
linux16 /boot/memtest86+.bin console=ttyS0,115200n8
}
### END /etc/grub.d/20_memtest86+ ###
### BEGIN /etc/grub.d/30_os-prober ###
menuentry "Windows 7 (loader) (on /dev/sda1)" --class windows --class os {
insmod part_msdos
insmod ntfs
set root='(hd0,msdos1)'
search --no-floppy --fs-uuid --set=root 4C844B34844B2036
chainloader +1
}
### END /etc/grub.d/30_os-prober ###
menuentry "Windows xp" --class windows --class os {
insmod ntfs
set root='(hd0,1)'
search --no-floppy --fs-uuid --set=root 4C844B34844B2036
drivemap -s (hd0) ${root}
chainloader +1
}
### 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 ###
以上就是小编分享的win7系统ubuntu 12.04 xp双盘3系统grub配置的操作方法有遇到这样情况的用户们可以采取上面的方法步骤来解决，还有不明白的小伙伴可以留言给小编来帮你们解惑。
