From: Mick <michaelkintzios@gmail.com>
To: gentoo-user@lists.gentoo.org
Subject: Re: [gentoo-user] Why grub can't load win kernel
Date: Wed, 5 Oct 2011 20:53:31 +0100 [thread overview]
Message-ID: <201110052053.42066.michaelkintzios@gmail.com> (raw)
In-Reply-To: <tencent_1BBB11A1745861EA1DC52BAE@qq.com>
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On Wednesday 05 Oct 2011 16:32:10 Lavender wrote:
> The configuration of win kernel in grub.conf is like below:
>
> rootnoverify (hd0,0)
> makeactive
> chainloader +1
Assuming that your MSWindows OS is on the first partition of the first (master)
disk then the above is correct and grub should boot it fine; i.e. MSWindows is
on /dev/sda1
> It worked yesterday , but after I rebuilding grub software, it can't work.
> I don't know why, it still can boot gentoo kernel, I am confused,because
> grub only can do operations to MBR, it can not influence contents on
> windows partition.
This is not entirely correct. GRUB will write its boot code where-ever *you*
tell it to write it ...
For example if you installed it on MSWindows' partition - instead of the disk
MBR - you will most likely not be able to boot MSWindows! This is because you
have overwritten the partition table with GRUB's code and GRUB cannot natively
boot MSWindows.
If for example you ran:
grub-install /dev/sda1
instead of the correct stanza of:
grub-install /dev/sda
you would have written GRUB on the wrong place, the first partition boot
record, instead of the disk's Master Boot Record. Of course your old GRUB
code in the MBR is still there and it happily boots Linux.
> I also tried boot manually in grub command interface, but after showing
> "load stage2" it goes back to grub > .... I'm gonna pissed..... I have
> many important things in windows system, will someone figure it out?
Calm down.
Your data is still there. Just the partition table has been overwritten - if
indeed you typed the wrong device as I suspect above. So the command you need
is fixboot and you need to run this from a MSWindows installation CD/USB stick
on the first partition.
Have a look on the Internet for more details on the fixboot command and its
modern equivalent (if you're running Windows7). Also have a look on the
Internet for MSWindows CDs or USB sticks to be able to run the command if you
don't have one handy.
HTH.
--
Regards,
Mick
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next prev parent reply other threads:[~2011-10-05 19:54 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-05 15:32 [gentoo-user] Why grub can't load win kernel Lavender
2011-10-05 15:39 ` Alan McKinnon
2011-10-05 16:26 ` Jonas de Buhr
2011-10-05 19:20 ` Alan McKinnon
2011-10-05 19:49 ` Jonas de Buhr
2011-10-05 19:53 ` Mick [this message]
-- strict thread matches above, loose matches on Subject: below --
2011-10-05 15:48 Lavender
2011-10-05 16:33 ` Jonas de Buhr
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