------------ Original Message ------------ > Date: Sunday, March 01, 2015 20:06:26 -0500 > From: Fred Smith <fredex at fcshome.stoneham.ma.us> > To: centos at centos.org > Subject: [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-cent > os-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 I too encountered this issue putting centos7 on a win7 machine. The solution is to: edit: /etc/grub.d/40_custom putting in: menuentry 'name' { insmod ntfs set root=(hd0,2) chainloader +1 } note: "name" can be anything you want (within reason), and is the name that will show in the boot menu. the values here: root=(hd0,2) will vary based on your disk setup. if you still have your fc19 grub/grub2 (whichever it used) configuration file you should be able to confirm the values from that. when done, then: grub2-mkconfig -o <output file> personally, i didn't set the -o to the production grub.cfg file as my preference is to make backups and check things before potentially trashing a file like that, but do as you wish. when you're comfortable with the generated file move it to the production location and reboot. - Richard