HDDs not showing up in BIOS after CSM disable.

[theexxman]

My Motherboard is a Gigabyte Aorus GA-AX370-Gaming K5. With a Ryzen 7 CPU. I have 2 HDDs with both Windows 10 and Ubuntu on them. I was attempting to use the program boot-repair to enable dual-boot in Ubuntu when I got an error saying that GPT detected. Please create a BIOS-boot partition. I did a google search and I found a website saying I needed to disable CSM. I went into BIOS and disabled CSM and my HDDs disappeared from the boot menu. When I went to the Windows command line after using my Windows 10 disk, I went into diskpart and typed list volume and the HDDs where still there. How do I get my two HDDs to show back up in boot order. I've tried "googling" and no satisfactory answer.

 

[ingtar33]

er...

you probably installed win10/ubuntu with CSM on. as long as you did that, win10/Ubuntu will notwork with CSM off. you'll probably need to reinstall both to get them to work with CSM off.

second all you really need to do to get Ubuntu to dual boot with win10, is install win10 first, turn off secure boot in the bios, then install ubuntu. the ubuntu installer should create the dual boot option for you.

 

[theexxman]

I tried enabling CSM again after I disabled it and the Hard drives still don't show up show up in BIOS so that I can actually boot from them.

 

[theexxman]

er...

you probably installed win10/ubuntu with CSM on. as long as you did that, win10/Ubuntu will notwork with CSM off. you'll probably need to reinstall both to get them to work with CSM off.

second all you really need to do to get Ubuntu to dual boot with win10, is install win10 first, turn off secure boot in the bios, then install ubuntu. the ubuntu installer should create the dual boot option for you.

I installed Windows 10 first on the sdb HDD hard drive. Then, secondly, I installed Ubuntu 18.04 on the sda hard drive. It wouldn't let me install Windows 10 on the sda hard drive. After I installed Ubuntu 18.04 it had to restart and it then booted up on Windows 10 and not Ubuntu. So, I restarted again and pressed F12 to get into my boot loader and booted from my Ubuntu hard drive. I did a search and a website suggested to download boot-repair and I preseeded to downloaded boot-repair from the terminal, but then it gave me an error which I posted in the original post. So, I did a search and found a website suggesting disabling CSM in order to get boot-repair to work as I stated in the original post.

 

[theexxman]

I am on a Mac Book Pro in order to post this.

 

[ingtar33]

don't know what to do to help you man.

 

[theexxman]

Thanks for the help, not! I just reinstalled windows 10 since no one would help me.