Dual Boot Issues with windows 10 & RHEL
Hi All,
Warm Greetings to all,
My query is, I have dell laptop with windows 10 installed. As of now i have started learning RHEL 7 so tried to install Linux on the same laptop and thought I could make it dual boot.
But dont know where I made mistake please help me,
Step that I performed;
Step 1 : I made a 98 GiB space unallocated out of 500GiB Hard Drive for linux installation, then i insert the RHEL disc and started installation.
Step 2: I given 3GiB for Swap and rest given to "/". with Standard Partition & EXT4 file system.
Now the installation done and able to boot with Linux but dual boot was not there.
I tried to check some internet tricks but i didnt know how to put them in /grub2/grub.cfg.
Then i recovered my MBR using the windows installation disc. but now am not able to boot with RHEL.
I tried EASYBCD tool so that i can make it dual boot. some how it detected the linux partitions i made entry but it was not booting to linux, always showing the GRUB> window. where i can use only few commands.
Can any body please help me how do i make my Windows 10 64bit and RHEL 7.3 64 bit dual boot ?
Sorry for my bad English..
Please help me to get this done.
Responses
First things first : You should not use 3rd party tools like EasyBCD, they can cause a whole lotta trouble, so undo all actions you made with this tool and uninstall it. Second point : In case that your DELL notebook has an EFI based BIOS, GRUB has to be installed to the EFI partition and not to the MBR. Solution : Disable hibernation and Fast start up in Windows and then shutdown the PC completely. Now boot from the RHEL installation medium and reinstall GRUB. Afterwards boot into BIOS and select RHEL as the default system. After having done these steps, the GRUB boot loader should be visible and give you the option to boot either RHEL or Windows.
Hi Christian, I have a similar problem while installing RHEL 7.3 in Dell XPS 9560 (64 bit) with 512 SSD with Windows 10 running. I have tried to install RHEL 7.3 via USB boot, while installing I got stuck at this location, INSTALLATION SECTION -> Device Selection -> Local Standard Disk shows "NOTHING" but the following error message "No disk detected. Please shutdown the computer, connect at least one disk, and restart to complete the installation". Please assist.
Hi Venkat,
This is most probably due to the fact that all partitions on the disk are formatted with ntfs. Download the GParted ISO file
from the GParted website - create a bootable USB media from this .iso file and boot from that USB drive.
Create a new partition and format it with ext4, create another partition and format it with swap. In case there is no free space on the disk, shrink the Windows partition. I've made a presentation to make it a bit easier to understand :
How to prepare a GPT based disk for an installation of a Linux operating system with GParted
Once finished, boot from the RHEL installation media and select the option "I will configure partitioning" from the Anaconda installer. Choose the partitions you have created before : / (root) and swap. Choose the existing efi partition as boot loader location.
By the way, RHEL 7.4 was just released, so I recommend to install that instead of RHEL 7.3 ... I wish you good luck !
Cheers :)
Christian
Something is still wrong. I tried to create partition using GParted but it only shows the USB drive in the partition window. Am i missing anything ?
Hi Christian, I have disabled SECURE BOOT option and changed the boot option from UEFI to LEGACY mode which later listed the SSD in INSTALLATION DESTINATION page. I'm able to successfully install RHEL 7.4 but Windows 10 is gone.
Hi Venkat,
It seems that you've chosen the default option when you installed RHEL, which can mean that the whole disk was wiped ... in case you want to reinstall Windows, I'd suggest that you start over from scratch. First boot from the GParted USB media and create a new GPT partition table, which wipes everything again, then create the partitions that are needed for Windows and for the RHEL system.
Leave Secure Boot disabled (Windows nevertheless boots in secure mode) - but change the boot mode back to UEFI. Afterwards install Windows and then RHEL 7.4, but this time choose "manual configuring" in Anaconda installer and select the ext4 partition for RHEL you had created before.
Regards,
Christian
Hi Team,
Can any one please help me in resolving my issue with red hat 7.2. I installed RedHatEnterpriseLinux 7.2 in my laptop by creating freespace in one of the drive. I inserted the red hat Linux disk and installed the OS. RedHat linux installed and it is running fine but it is not showing booting option for windows 10 os. I dont know how to resolve this issue, Please help me regrading this issue.
Thanks and Regards Shaik Nashruddin.
Shaik Nashruddin, it is better you spin out a new thread for this, because this thread might have been marked as resolved and you may not get proper help. You may have to define the issue clearly.. just saying ...
it is not showing booting option for windows 10 os
is not enough. Hence, please open a new thread and clearly write out the issue with all steps and screen images if you've to get help.
Hi Shaik,
Sadashiva is right, you definitely have to provide more information and because nearly every setup is different, a new thread would be a good idea. But to give you a first advice ... please check whether Windows is still installed at all. As I said above, many users accidentally 'wipe the whole disk' when attempting to install a new system. Secondly, execute sudo grub2-mkconfig -o /boot/efi/EFI/redhat/grub.cfg if you have installed the RHEL system in EFI mode or sudo grub2-mkconfig -o /boot/grub2/grub.cfg when you have installed the system in legacy BIOS (mbr) mode.
Maybe that is already enough to let Windows appear in the GRUB boot menu. You also should check in BIOS if there is a boot option for Windows and if you can launch it from there - this is valid for UEFI installation only. Something else :
Why did you install RHEL 7.2 and not the latest stable edition 7.4 ? Upgrading later on might cause a lot of trouble ! :)
Regards,
Christian
Hi all, I just installed RHEL 7.4 on my lenovo thinkcenter desktop. I have Windows 10 installed before then. I created a partion of 40GB where i installed Linux. Now i cant boot to Windows any more. Could some please help me with a detailed step-by-step procedure to dual boot my system.
Thank you
Hi Nureni,
Execute sudo grub2-mkconfig -o /boot/efi/EFI/redhat/grub.cfg and reboot. Now you should see a Windows entry in the GRUB boot menu - if you don't, boot into BIOS and check whether you can select to boot Windows from there. In case Windows is not listed, boot from the Windows installation medium and reinstall the Windows boot loader (select "Repair my computer" - follow the instructions). Maybe you have to reinstall GRUB afterwards (do this from the RHEL installation medium), because Windows tends to override the EFI partition. :)
Regards,
Christian
Hi all, I just installed RHEL 7.4 on my lenovo thinkcenter desktop. I have Windows 10 installed before then. I created a partion of 40GB where i installed Linux. Now i cant boot to Windows any more. Could some please help me with a detailed step-by-step procedure to dual boot my system.i also edit grub file but windows can't boot.That's so signature error so anyone help me ???????
Hi christian,
I had windows 7 installed and working . i tried to install RHEL 7.0 installation started and failed after 5-10 mins that an error occurred hence i had to quit and after that i am unable to boot windows 7 even i tried to repair and reinstall using win 7 installation media but unable to detect my sata hardisk. Please help and suggest.
Obaid
Hi Obaid,
Did you select "Automatic Partitioning" ? If you didn't select "Manual Partitioning" the whole disk was used. That means that everything has been wiped and in this case you - unfortunately - have to reinstall Windows and RHEL.
Sorry for being the harbinger of bad news ... :)
Regards,
Christian
If this still helps someone: I also was unable to boot into the Windows partition after installing RHEL 7.5. Eventually found out that the Windows Bootloader was corrupt. You can check this by loading the UEFI boot menu and trying to load the "Windows boot manager" entry. Fixed the bootloader based on this article: http://woshub.com/how-to-repair-uefi-bootloader-in-windows-8/ (note to use correct locale in case Windows is not en-us). Then I managed to add it to grub using grub2-mkconfig,
Best Regards,
Amit
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