grub手动引导win7

grub>rootnoverify (hd0,0)--->win7系统安装盘号

grub > chainloader +1

grub > makeactive     --->激活主分区

grub > boot

 

rootnoverify(hd0,4)、chainloader   +1”   means 

      If   you   want   to   boot   an   unsupported   operating   system   (e.g.   Windows 95),   chain-load   a   boot   loader   for   the   operating   system.   Normally,   the boot   loader   is   embedded   in   the   "boot   sector "   of   the   partition   on   which the   operating   system   is   installed. 

 

rootnoverify(hd0,4):Set   GRUB 's   root   device   to   the   partition 

 

chainloader   +1:Load   the   boot   loader,   `+1 '   indicates   that   GRUB   should   read   one   sector   from   the   start   of     the   partition 

 

root指定根分区并挂载，rootnoverify指定根分区但不挂载之。

举例来说：在grub中要引导windows系统，就可以指定windows所在分区，但不用挂载，比如：

grub>rootnoverify (hd0,1)

grub>chainloader +1

grub>boot

而要进入linux系统，就需要挂载，如：

grub>root (hd0,5)