Re: Chainloading windows 7 installed on a local partition

[Pascal COMBES]

Le 05/06/2013 18:59, Andrey Borzenkov a écrit :
> В Tue, 04 Jun 2013 23:16:05 +0200
> Pascal COMBES <address@hidden> пишет:
>
> > Hello everyone,
> >       I would want to submit you a problem I encountered when trying to
> > install Ubuntu (on sda6) after having installed Windows 7 on a logical
> > partition (sda5). Before the installation of Ubuntu, Windows 7 was on
> > its logical partition (sda5) and it worked well. A detail : When
> > installing Ubuntu, I put Grub on a separate boot partition (sda3).
> >
> >       I tried to reconfigure Grub so that it boots either Ubuntu or
> > Windows seven with :
> > menuentry "Windows 7" {
> >       insmod ntfs
> >       insmod chain
> not directly related but you do not need "insmod ntfs" here
>
> >       set root = (hd0,5)
> >       chainloader +1
> > }
> > but it didn't work : Ubuntu boots without any problem but Windows don't.
> > So I tested with the search function :
> > menuentry "Windows 7" {
> >       insmod ntfs
> >       insmod chain
> no here
>
> >       search --no-floppy --fs-uuid --set=root ${UUID_OF_MY_DISK}
> >       chainloader +1
> > }
> > and it again didn't work same problem. Notice I got the UUID with sudo
> > blkid /dev/sda5.
> >
> > The error message was :
> > Erreur lecture disque
> > which means "Error reading disk". As this is in French I guess that it
> > is a message from Windows, isn't it?
> >
> >       I read a little bit on the Internet and I found some posts that I
> > think said it was possible but other pretend it isn't. But none of them
> > were very clear. So, I don't know what to think that is why I'm asking :
> > /Can grub chainload Wi//ndows when windows is installed on a logical
> > partition? /If this is possible, may you give me some hints on why I
> > didn't manage to set it up? Otherwise, I will change my partition table
> > and reinstall everything in a different manner (by the way can you
> > confirm to me that grub can be installed in a logical partition?)
> >
> >       I give you my partition table :
> > primary /dev/sda1 (Dell stuff I cannot delete because of guarantee)
> > primary /dev/sda2 (Dell stuff I cannot delete because of guarantee)/
> > /primary /dev/sda3 (boot partition where grub  is installed)
> > logical /dex/sda5 (Windows 7)
> I do not think Windows can boot from logical partition. So I suspect
> Windows bootloader is actually installed on either sda1 or sda2.
> Could you try running "os-prober" from Ubuntu - may be it finds Windows
> loader for you? You could also try bootinfoscript to check what it
> find about various loaders on your disk.
Hello,
You are right. I just looked at the contents of the partition /dev/sda1 
(I can read it with Ubuntu) and I saw that some files appeared. I think 
the explantion of this miracle is the following : As everybody says, 
Windows bootloader must be installed on a primary partition. However you 
can easily install Windows on another partition. In this case during the 
installation process it creates a boot sector in another partition. But 
it didn't warn you of what he has done. I hope it didn't crash any Dell 
files. I will have a check.
Thank you very much. Best regards,
Pascal.
> > logical /dev/sda6 (Ubuntu)
> > and some other (for data and swap) but I don't think you need them.
> >
> >       I thank you in advance for you response and please you to excuse my
> > bad English. Best regards,
> > Pascal COMBES
> >
> >
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