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Guide: Multibooting UEFI on Separate Drives

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Hello added details in section

But computer is

Dell 3060 MFF
I5-8500T
MB is dell 0NV0M7
Intel UHD Graphics 630
Thanks
 
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That's because the one labeled "Boot Windows from SYSTEM" is a legacy entry. You can eliminate this by following my instructions in this post. There's no need to hide the partition.



It's just called EFI that's standard and I didn't see anything in the guide recommending naming it SYSTEM.



Yes that's correct and that is standard as well.
@jpz4085 Thank you for responding. I tried custom and it did not work. Even tried just Entries

392975


and no luck.

When I talked about the guide, I was talking about online guides that walked me through adding an EFI partition. When the went through the diskpart instructions, they always specified the label as "System".

So your EFI partition is named EFI and you have a folder EFI at the root?

When of the things I am struggling with is that my Windows HD has 4 partitions.

  1. 1mb unallocated space I cannot seem to merge or move
  2. SYSTEM partition with EFI folder in root
  3. MSR partition (unformatted)
  4. Windows Partition
I am wondering if that first 1 is messing me up. I only see it when using EasyUS tool, not in Disk Manager.
 
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@jpz4085 Thank you for responding. I tried custom and it did not work. Even tried just Entries

View attachment 392975

and no luck.

When I talked about the guide, I was talking about online guides that walked me through adding an EFI partition. When the went through the diskpart instructions, they always specified the label as "System".

So your EFI partition is named EFI and you have a folder EFI at the root?

When of the things I am struggling with is that my Windows HD has 4 partitions.

  1. 1mb unallocated space I cannot seem to merge or move
  2. SYSTEM partition with EFI folder in root
  3. MSR partition (unformatted)
  4. Windows Partition
I am wondering if that first 1 is messing me up. I only see it when using EasyUS tool, not in Disk Manager.
Sounds like you have a legacy Windows installation. Is your Windows drive MBR format? You can check in disk management. If so it would normally have those system and MSR partitions but the guide at the beginning of this thread is for UEFI.

On a GPT format disk the EFI partition is located at the very front and labeled as such and yes it contains the EFI folder and it's contents. GPT/GUID partitioning is also required for Windows UEFI boot mode.

Which Windows entry (legacy or EFI) on the Clover menu works? Also you indicated this is a dedicated Windows drive. Is it first in the UEFI boot order? Just where is Clover booting from? The F12 menu might provide a clue if you're not sure.
 
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Well, I just learned that PCIe M.2 slots cannot be disabled in BIOS. Makes sense I guess.
So, I had to tear it down, remove all NVMe drives except the one I wanted to install windows on... Put the rest of the parts back together... install Windows 10... tear it down again... reinstall the other NVMe drives...put it back together.

needless to say, that was a monumental PitB :-/

Anyway, @Going Bald was right.(Thanks for the nudge) Getting those other drives out of the way was the only way to install Win10 in this case. When will MS decide to become multiboot aware?
I had to do the same today. when I built my hack, windows was already installed on the sata ssd, I had to re-install windows because of an error and couldn't get pass the "next phase" error. disconnected the sata ssd and connected to an old laptop, in order to get windows to install with the correct efi partition, Turns out the Asus touch screen laptop can be hacked! PitB turned into a project for me! I read every post in this thread to see if there was a workaround, and your post was the only solution for us with NVME ssd. thanks
 
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Sounds like you have a legacy Windows installation. Is your Windows drive MBR format? You can check in disk management. If so it would normally have those system and MSR partitions but the guide at the beginning of this thread is for UEFI.

On a GPT format disk the EFI partition is located at the very front and labeled as such and yes it contains the EFI folder and it's contents. GPT/GUID partitioning is also required for Windows UEFI boot mode.

Which Windows entry (legacy or EFI) on the Clover menu works? Also you indicated this is a dedicated Windows drive. Is it first in the UEFI boot order? Just where is Clover booting from? The F12 menu might provide a clue if you're not sure.
  1. Before I created the EFI partition I ran a convert and diskpart told me it was already GPT so it was never MBR
  2. The EFI partition is at the front, right befor the MSR. The EFI file was transferred from the clover EFI folder and I also did a rebuild of the EFI.
  3. It boots from the entry labeled Boot Microsoft EFI from SYSTEM, which is the first option available on the clover screen. The other 2 options are Boot macOS from Macintosh HD and the last one is Boot Windows from SYSTEM
  4. I assume you mean in BIOS. I tried having only the UEFI Clover as the first drive, everything else disabled.
  5. Clover boots from Boot macOS from Macintosh HD (the EFI partition for clover)
I will remove the non UEFI boot data from the Windows UEFI folder if it's there and that's the issue. Will report back.
 
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@jpz4085 I finally figured out what's causing the problem. I wiped the partition again and recreated the bootrec and bcdboot.

It seems like it installs both UEFI and AND legacy boot:

393231


I just need to figure out which files to erase. Looks like the whole Microsoft folder needs to go.
 
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@jpz4085 I finally figured out what's causing the problem. I wiped the partition again and recreated the bootrec and bcdboot.

It seems like it installs both UEFI and AND legacy boot:

View attachment 393231

I just need to figure out which files to erase. Looks like the whole Microsoft folder needs to go.
im Not a Pro or anything, but after comparing my Microsoft folders to the pic posted above, I think the BCD has to go. not sure, but I do not see BCD in my folder
 
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Won't boot without BCD.

Any chance it is detecting my Parallels Windows VM?
 
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Solved! Apparently when I unchecked Legacy in Clover Configurator GUI but it didn't write it to the config.plist. I checked and unchecked it and it wrote to the config.plist properly. All fixed now, what a pain and waste of time.
 
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