First post! Glad to be part of the community.

I'm trying configure Dell Precision desktop machines with with both Windows 7 and Redhat in dual boot mode, but i cant get it to work properly, the GRUB bootloader which was installed cannot be found or read.

I’ve been successful before in dual booting both windows 7 + redhat on machines using “Legacy Boot” instead of “UEFI”, grub being the main bootloader.

These are the steps I would use:

Using Gparted boot disk, I would create GPT formatted 2TB drive with a 150GB partition dedicated for the RedHat OS. Windows installation would be done first using UEFI firmware to boot.

The reason I'm using GPT partition table because we use disks more than 2TB, and UEFI has the ability to boot a GPT parted drive.

SECURE BOOT HAS BEEN TURNED OFF

Windows partitions:
/sda1  ntfs, C:\ 1.85TB
/sda2  windows EFI partition (could be the windows bootloader) 128MB
/sda3 unknown partition 100MB

After windows installation, OS boots correctly using UEFI

RedHat installation:

The version is RedHat Enterprise Linux Workstation 6.4 x86_64

Using RHEL 6 DVD for install using “UEFI” to boot DVD

I would create linux partitions from the 150GB space

Linux partitions
/sda4  swap 4GB
/sda5  /boot/efi 500MB
/sda6  / 145GB

From what I read online, there needs to be a /boot/efi partition when using UEFI. That’s why I created a “/boot/efi” instead of “/boot” partition

The issue from the GUI installation of RHEL6 is that it wants to put GRUB on the /sda1 partition which the main Windows partition. I cant change the path of installation, and can only uncheck the installation of the bootloader, and the order of which OS will be displayed on the GRUB Menu. From previous attempts installing GRUB on sda1, every reboot is automatically sent to boot windows with no GRUB menu prompt after the BIOS loads.

From previous UEFI installations of RedHat the grub.conf file was in /boot/efi/EFI/redhat/grub.conf

I’m wondering if I have to manually create a grub.conf file and use /sbin/grub-install utility to properly install GRUB as the bootloader for both windows and redhat when using UEFI? If so, is there a way to do it, or is there any documentation to manually create a grub.conf and bootloader install using UEFI?

I appreciate any help with this. Thanks

you might want to reread the redhat install guide
https://access.redhat.com/site/docum...ide/index.html
this section
https://access.redhat.com/site/docum...ting-uefi.html
and
https://access.redhat.com/site/docum...n-process.html
and page 2
https://access.redhat.com/site/docum...wn-loader.html




if you have questions you might want to use that paid for tech support that you are required to buy .

or search the redhat knowledge base that the required support contract gives you access to
https://access.redhat.com/search/bro...#?&language=en
( most of the search output will REQUIRE you to login to the red hat site using the credentials you set up with the paid for license you bought.)