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-w... 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@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
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.
On Mon, Mar 02, 2015 at 01:15:14AM +0000, miguelmedalha@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
On Sun, Mar 1, 2015 at 6:06 PM, Fred Smith fredex@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.
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@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.
On Mon, Mar 2, 2015 at 5:16 AM, Fred Smith fredex@fcshome.stoneham.ma.us wrote:
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.
Weird. So that means os-prober isn't finding Windows. What do you get for the following commands:
# parted /dev/sdX u s p ##X= drive with windows on it # os-prober
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):
I use it to handles 4 os
tell me...
Pol
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-w... 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@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, Mário
On Mon, Mar 02, 2015 at 03:33:59PM +0100, Mário 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-w... 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@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
- Install ntfs "support"
yum install -y epel-release yum install -y ntfs-3g ntfsprogs
- re-run the grub config gen script
grub2-mkconfig -o /boot/grub2/grub.cfg
Best, Mário
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
On Mon, Mar 2, 2015 at 7:55 AM, Fred Smith fredex@fcshome.stoneham.ma.us wrote:
On Mon, Mar 02, 2015 at 03:33:59PM +0100, Mário Barbosa wrote:
- Install ntfs "support"
yum install -y epel-release yum install -y ntfs-3g ntfsprogs
- re-run the grub config gen script
grub2-mkconfig -o /boot/grub2/grub.cfg
Best, Mário
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.
Ahh yes, good tip.
I'm pretty sure dual-boot on CentOS is de-emphasized or maybe flat out not supported, is probably why ntfs3-g isn't on the installer media. On Fedora, that's a required based package because of explicit dual boot support, and it's necessary because the installer uses ntfs-3g to resize the Windows volume to make room for Fedora.
On Mon, Mar 02, 2015 at 06:05:37PM -0700, Chris Murphy wrote:
On Mon, Mar 2, 2015 at 7:55 AM, Fred Smith fredex@fcshome.stoneham.ma.us wrote:
On Mon, Mar 02, 2015 at 03:33:59PM +0100, Mário Barbosa wrote:
- Install ntfs "support"
yum install -y epel-release yum install -y ntfs-3g ntfsprogs
- re-run the grub config gen script
grub2-mkconfig -o /boot/grub2/grub.cfg
Best, Mário
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.
Ahh yes, good tip.
I'm pretty sure dual-boot on CentOS is de-emphasized or maybe flat out not supported, is probably why ntfs3-g isn't on the installer media. On Fedora, that's a required based package because of explicit dual boot support, and it's necessary because the installer uses ntfs-3g to resize the Windows volume to make room for Fedora.
So that's why it worked with F19. I sure didn't know Anaconda could resize the Windoze partition for you... I did it with gparted-live when I installed F19.
As my mom used to say: "You live and learn!:
-
Chris Murphy -
Fred Smith -
miguelmedalha＠sapo.pt -
Mário Barbosa -
Pol Hallen