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Fred Smith

2015-Mar-02 01:06 UTC

[CentOS] installing C7 on a laptop with Win7, dual boot

Hi all!

I've just installed C7 on my netbook that already contained Win7 (and
also Fedora 19, which the C7 is intended to replace). The Fedora installer
had found the windows installation and it appeared in the grub menu,
and was bootable and worked fine.

The C7 installer did not put the windows installation into the grub
menu.

with some googling I found a page at
https://priteshugrankar.wordpress.com/2014/09/12/dual-booting-centos-7-and-windows-7/
that gives a simple recipe for
fixing this problem. basically:

cp /boot/grub2/grub.cfg orig.grub.cfg
grub2-mkconfig -o /boot/grub2/grub.cfg

with (on his system) the second command above producing this output:

	[root at localhost ~]# grub2-mkconfig -o /boot/grub2/grub.cfg
	Generating grub configuration file ...
	Found linux image: /boot/vmlinuz-3.16.2-1.el7.elrepo.x86_64
	Found initrd image: /boot/initramfs-3.16.2-1.el7.elrepo.x86_64.img
	Found linux image: /boot/vmlinuz-3.10.0-123.el7.x86_64
	Found initrd image: /boot/initramfs-3.10.0-123.el7.x86_64.img
	Found linux image: /boot/vmlinuz-3.10.0-123.6.3.el7.x86_64
	Found initrd image: /boot/initramfs-3.10.0-123.6.3.el7.x86_64.img
	Found linux image: /boot/vmlinuz-0-rescue-327fe33f3b364802871211321a2790b7
	Found initrd image:
/boot/initramfs-0-rescue-327fe33f3b364802871211321a2790b7.img
	Found Windows 7 (loader) on /dev/sda1
	Found Windows 7 (loader) on /dev/sda2
	done

Unfortunately, when I did it, I got this:

Generating grub configuration file ...
Found linux image: /boot/vmlinuz-3.10.0-123.el7.x86_64
Found initrd image: /boot/initramfs-3.10.0-123.el7.x86_64.img
Found linux image: /boot/vmlinuz-3.10.0-123.20.1.el7.x86_64
Found initrd image: /boot/initramfs-3.10.0-123.20.1.el7.x86_64.img
Found linux image: /boot/vmlinuz-0-rescue-c875112952114f6284f69abaa4f9a2f7
Found initrd image:
/boot/initramfs-0-rescue-c875112952114f6284f69abaa4f9a2f7.img
done

No mention of the windows installation.

It's not that I use the win7 installation much, but I do want to be able
to do so when one of those rare occasions pops up.

Thanks in advance!

Fred

-- 
---- Fred Smith -- fredex at fcshome.stoneham.ma.us
-----------------------------
    "Not everyone who says to me, 'Lord, Lord,' will enter the
kingdom of
     heaven, but only he who does the will of my Father who is in heaven."
------------------------------ Matthew 7:21 (niv) -----------------------------

miguelmedalha at sapo.pt

2015-Mar-02 01:15 UTC

head link

[CentOS] installing C7 on a laptop with Win7, dual boot

>
> It's not that I use the win7 installation much, but I do want to be
able
> to do so when one of those rare occasions pops up.
>
If your laptop is powerful enough and its processor supports hardware  
virtualization, you can have both systems running at the same time  
with almost no speed decrease. There are free virtualization solutions  
such as Virtual Box. You would instsl C7 and then create a virtual  
machine for Windows. When you need Windows, just run it in a window.

Dual boot is a PITA.

Fred Smith

2015-Mar-02 02:02 UTC

head link

[CentOS] installing C7 on a laptop with Win7, dual boot

On Mon, Mar 02, 2015 at 01:15:14AM +0000, miguelmedalha at sapo.pt
wrote:> 
> >
> >It's not that I use the win7 installation much, but I do want to be
able
> >to do so when one of those rare occasions pops up.
> >
> 
> If your laptop is powerful enough and its processor supports
> hardware virtualization, you can have both systems running at the
> same time with almost no speed decrease. There are free
> virtualization solutions such as Virtual Box. You would instsl C7
> and then create a virtual machine for Windows. When you need
> Windows, just run it in a window.
> 
> Dual boot is a PITA.
yeah, I know!

this is a netbook with a dual core 1.6Ghz Atom. not very powerful.

I also don't have any installation media, all I have is the running
Windows system, so I'd have to figure out how to turn a "real"
machine
into a VM. I know its doable, I'm just not sure I want to go that route.

but thanks for the suggestion!

Fred
-- 
---- Fred Smith -- fredex at fcshome.stoneham.ma.us
-----------------------------
               But God demonstrates his own love for us in this: 
                         While we were still sinners, 
                              Christ died for us.
------------------------------- Romans 5:8 (niv) ------------------------------

Chris Murphy

2015-Mar-02 04:26 UTC

head link

[CentOS] installing C7 on a laptop with Win7, dual boot

On Sun, Mar 1, 2015 at 6:06 PM, Fred Smith
<fredex at fcshome.stoneham.ma.us> wrote:> Unfortunately, when I did it, I got this:
>
> Generating grub configuration file ...
> Found linux image: /boot/vmlinuz-3.10.0-123.el7.x86_64
> Found initrd image: /boot/initramfs-3.10.0-123.el7.x86_64.img
> Found linux image: /boot/vmlinuz-3.10.0-123.20.1.el7.x86_64
> Found initrd image: /boot/initramfs-3.10.0-123.20.1.el7.x86_64.img
> Found linux image: /boot/vmlinuz-0-rescue-c875112952114f6284f69abaa4f9a2f7
> Found initrd image:
/boot/initramfs-0-rescue-c875112952114f6284f69abaa4f9a2f7.img
> done
>
> No mention of the windows installation.
Short solution:
Does /etc/default/grub contain 'GRUB_DISABLE_OS_PROBER="true" ? If
so,
comment that out and rerun the grub2-mkconfig command.


-- 
Chris Murphy

Fred Smith

2015-Mar-02 12:16 UTC

head link

[CentOS] installing C7 on a laptop with Win7, dual boot

On Sun, Mar 01, 2015 at 09:26:59PM -0700, Chris Murphy
wrote:> On Sun, Mar 1, 2015 at 6:06 PM, Fred Smith
> <fredex at fcshome.stoneham.ma.us> wrote:
> > Unfortunately, when I did it, I got this:
> >
> > Generating grub configuration file ...
> > Found linux image: /boot/vmlinuz-3.10.0-123.el7.x86_64
> > Found initrd image: /boot/initramfs-3.10.0-123.el7.x86_64.img
> > Found linux image: /boot/vmlinuz-3.10.0-123.20.1.el7.x86_64
> > Found initrd image: /boot/initramfs-3.10.0-123.20.1.el7.x86_64.img
> > Found linux image:
/boot/vmlinuz-0-rescue-c875112952114f6284f69abaa4f9a2f7
> > Found initrd image:
/boot/initramfs-0-rescue-c875112952114f6284f69abaa4f9a2f7.img
> > done
> >
> > No mention of the windows installation.
> 
> Short solution:
> Does /etc/default/grub contain 'GRUB_DISABLE_OS_PROBER="true"
? If so,
> comment that out and rerun the grub2-mkconfig command.
No, it doesn't contain that line.

-- 
---- Fred Smith -- fredex at fcshome.stoneham.ma.us
-----------------------------
               But God demonstrates his own love for us in this: 
                         While we were still sinners, 
                              Christ died for us.
------------------------------- Romans 5:8 (niv) ------------------------------

Pol Hallen

2015-Mar-02 14:05 UTC

head link

[CentOS] installing C7 on a laptop with Win7, dual boot

> I've just installed C7 on my netbook that already contained Win7 (and
> also Fedora 19, which the C7 is intended to replace).
If you want "dodge" a fight with grub, you can install EasyBCD (to 
windows OS) and handles multiple systems. (you can found a trial version):

http://neosmart.net/EasyBCD/

I use it to handles 4 os

tell me...

Pol

Mário Barbosa

2015-Mar-02 14:33 UTC

head link

[CentOS] installing C7 on a laptop with Win7, dual boot

On 03/02/2015 02:06 AM, Fred Smith wrote:> Hi all!
> 
> I've just installed C7 on my netbook that already contained Win7 (and
> also Fedora 19, which the C7 is intended to replace). The Fedora installer
> had found the windows installation and it appeared in the grub menu,
> and was bootable and worked fine.
> 
> The C7 installer did not put the windows installation into the grub
> menu.
> 
> with some googling I found a page at
https://priteshugrankar.wordpress.com/2014/09/12/dual-booting-centos-7-and-windows-7/
that gives a simple recipe for
> fixing this problem. basically:
> 
> cp /boot/grub2/grub.cfg orig.grub.cfg
> grub2-mkconfig -o /boot/grub2/grub.cfg
> 
> with (on his system) the second command above producing this output:
> 
> 	[root at localhost ~]# grub2-mkconfig -o /boot/grub2/grub.cfg
> 	Generating grub configuration file ...
> 	Found linux image: /boot/vmlinuz-3.16.2-1.el7.elrepo.x86_64
> 	Found initrd image: /boot/initramfs-3.16.2-1.el7.elrepo.x86_64.img
> 	Found linux image: /boot/vmlinuz-3.10.0-123.el7.x86_64
> 	Found initrd image: /boot/initramfs-3.10.0-123.el7.x86_64.img
> 	Found linux image: /boot/vmlinuz-3.10.0-123.6.3.el7.x86_64
> 	Found initrd image: /boot/initramfs-3.10.0-123.6.3.el7.x86_64.img
> 	Found linux image: /boot/vmlinuz-0-rescue-327fe33f3b364802871211321a2790b7
> 	Found initrd image:
/boot/initramfs-0-rescue-327fe33f3b364802871211321a2790b7.img
> 	Found Windows 7 (loader) on /dev/sda1
> 	Found Windows 7 (loader) on /dev/sda2
> 	done
> 
> Unfortunately, when I did it, I got this:
> 
> Generating grub configuration file ...
> Found linux image: /boot/vmlinuz-3.10.0-123.el7.x86_64
> Found initrd image: /boot/initramfs-3.10.0-123.el7.x86_64.img
> Found linux image: /boot/vmlinuz-3.10.0-123.20.1.el7.x86_64
> Found initrd image: /boot/initramfs-3.10.0-123.20.1.el7.x86_64.img
> Found linux image: /boot/vmlinuz-0-rescue-c875112952114f6284f69abaa4f9a2f7
> Found initrd image:
/boot/initramfs-0-rescue-c875112952114f6284f69abaa4f9a2f7.img
> done
> 
> No mention of the windows installation.
> 
> It's not that I use the win7 installation much, but I do want to be
able
> to do so when one of those rare occasions pops up.
> 
> Thanks in advance!
> 
> Fred

1) Install ntfs "support"
yum install -y epel-release
yum install -y ntfs-3g ntfsprogs

2) re-run the grub config gen script
grub2-mkconfig -o /boot/grub2/grub.cfg

Best,
M?rio

Fred Smith

2015-Mar-02 14:55 UTC

head link

[CentOS] installing C7 on a laptop with Win7, dual boot

On Mon, Mar 02, 2015 at 03:33:59PM +0100, M?rio Barbosa
wrote:> On 03/02/2015 02:06 AM, Fred Smith wrote:
> > Hi all!
> > 
> > I've just installed C7 on my netbook that already contained Win7
(and
> > also Fedora 19, which the C7 is intended to replace). The Fedora
installer
> > had found the windows installation and it appeared in the grub menu,
> > and was bootable and worked fine.
> > 
> > The C7 installer did not put the windows installation into the grub
> > menu.
> > 
> > with some googling I found a page at
https://priteshugrankar.wordpress.com/2014/09/12/dual-booting-centos-7-and-windows-7/
that gives a simple recipe for
> > fixing this problem. basically:
> > 
> > cp /boot/grub2/grub.cfg orig.grub.cfg
> > grub2-mkconfig -o /boot/grub2/grub.cfg
> > 
> > with (on his system) the second command above producing this output:
> > 
> > 	[root at localhost ~]# grub2-mkconfig -o /boot/grub2/grub.cfg
> > 	Generating grub configuration file ...
> > 	Found linux image: /boot/vmlinuz-3.16.2-1.el7.elrepo.x86_64
> > 	Found initrd image: /boot/initramfs-3.16.2-1.el7.elrepo.x86_64.img
> > 	Found linux image: /boot/vmlinuz-3.10.0-123.el7.x86_64
> > 	Found initrd image: /boot/initramfs-3.10.0-123.el7.x86_64.img
> > 	Found linux image: /boot/vmlinuz-3.10.0-123.6.3.el7.x86_64
> > 	Found initrd image: /boot/initramfs-3.10.0-123.6.3.el7.x86_64.img
> > 	Found linux image:
/boot/vmlinuz-0-rescue-327fe33f3b364802871211321a2790b7
> > 	Found initrd image:
/boot/initramfs-0-rescue-327fe33f3b364802871211321a2790b7.img
> > 	Found Windows 7 (loader) on /dev/sda1
> > 	Found Windows 7 (loader) on /dev/sda2
> > 	done
> > 
> > Unfortunately, when I did it, I got this:
> > 
> > Generating grub configuration file ...
> > Found linux image: /boot/vmlinuz-3.10.0-123.el7.x86_64
> > Found initrd image: /boot/initramfs-3.10.0-123.el7.x86_64.img
> > Found linux image: /boot/vmlinuz-3.10.0-123.20.1.el7.x86_64
> > Found initrd image: /boot/initramfs-3.10.0-123.20.1.el7.x86_64.img
> > Found linux image:
/boot/vmlinuz-0-rescue-c875112952114f6284f69abaa4f9a2f7
> > Found initrd image:
/boot/initramfs-0-rescue-c875112952114f6284f69abaa4f9a2f7.img
> > done
> > 
> > No mention of the windows installation.
> > 
> > It's not that I use the win7 installation much, but I do want to
be able
> > to do so when one of those rare occasions pops up.
> > 
> > Thanks in advance!
> > 
> > Fred
> 
> 
> 1) Install ntfs "support"
> yum install -y epel-release
> yum install -y ntfs-3g ntfsprogs
> 
> 2) re-run the grub config gen script
> grub2-mkconfig -o /boot/grub2/grub.cfg
> 
> Best,
> M?rio
Ah, Mario, that's exactly what I needed to know! thanks!

It seems rather like a chicken-and-the-egg problem, which came first?
you can't install ntfs-3g until you've installed the system, and it
won't notice the windows partition(s) there until you've installed
ntfs-3g. But it sets up the grub config at install time, so you get
a system apparently without windows support.

A newbie (which I'm not) would certainly find this confusing/disheartening.

Thanks again for the solution I needed!

Fred

-- 
---- Fred Smith -- fredex at fcshome.stoneham.ma.us
-----------------------------
   "For the word of God is living and active. Sharper than any double-edged
   sword, it penetrates even to dividing soul and spirit, joints and marrow; 
              it judges the thoughts and attitudes of the heart."  
---------------------------- Hebrews 4:12 (niv) ------------------------------

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