关于双硬盘双系统下修改Grub引导的问题

如果有两个硬盘，我的机器是三个硬盘，在hd0安装了linux，hd1安装windows，两个系统相互不影想
　
　　但默认情况下grub却不能起动windows，经过几番摸索
　
　　终于解决了，在grub加了两行
　
　　 title WINDOWS server 2003 map (hd1) (hd0) map (hd0) (hd1)

　
　　这样就解决了双硬盘启动问题，无需改动bios的默认启动硬盘。
　
　　下面我的grub.conf供参考

# grub.conf generated by anaconda # # Note that you do not have to rerun grub after making changes to this file # NOTICE: You do not have a /boot partition. This means that # all kernel and initrd paths are relative to /, eg. # root (hd0,0) # kernel /boot/vmlinuz-version ro root=/dev/sda1 # initrd /boot/initrd-version.img #boot=/dev/sda default=0 timeout=1000 splashimage=(hd0,0)/boot/grub/splash.xpm.gz hiddenmenu password --md5 $1$0t5znogn$/NkIpZK4EdR2hoYIxkhKc. title Red Hat Enterprise Linux AS (2.6.9-55.ELsmp) root (hd0,0) kernel /boot/vmlinuz-2.6.9-55.ELsmp ro root=LABEL=/1 rhgb quiet initrd /boot/initrd-2.6.9-55.ELsmp.img #title Red Hat Enterprise Linux AS-up (2.6.9-55.EL) # root (hd0,0) # kernel /boot/vmlinuz-2.6.9-55.EL ro root=LABEL=/1 rhgb quiet # initrd /boot/initrd-2.6.9-55.EL.img title WINDOWS map (hd1) (hd0) map (hd0) (hd1) rootnoverify (hd1,0) chainloader +1