Day 1 BootIt UEFI install to dual boot Win10 & Mint 19.1

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Re: Day 1 BootIt UEFI install to dual boot Win10 & Mint 19.1

Postby brucebne » Sun Jan 20, 2019 7:46 pm

> We can't do that with GPT disks. No matter whether you choose Disk, Linux partition
> or EFI System partition, grub goes to the EFI System partition. Into \EFI\ubuntu.xxx.
> If you multi-boot several Linux OS you will have \EFI\ubuntu.001, \EFI\ubuntu.002,
> \EFI\ubuntu.003, etc.

LOL..how about that! I'm still very novice with GPT setups.
Thanks for pointing that out. It explains a lot of things I hadn't thought through.

If you can recommend a good resource explaining EFI partition usage for multibooting and troubleshooting, I'd appreciate it.
There's so much stuff written on that is misinformed.
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Re: Day 1 BootIt UEFI install to dual boot Win10 & Mint 19.1

Postby Brian K » Sun Jan 20, 2019 8:23 pm

These are general information on GPT...

https://docs.microsoft.com/en-us/previo ... 35(v=vs.85)

https://en.wikipedia.org/wiki/GUID_Partition_Table

In your Boot Items I assume you have Rename Directory selected. So when you boot Microsoft.xxx the folder is renamed to Microsoft or when you boot ubuntu.xxx the folder is renamed to ubuntu.
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Re: Day 1 BootIt UEFI install to dual boot Win10 & Mint 19.1

Postby TeraByte Support » Mon Jan 21, 2019 12:00 am

They are constantly being updated and added to. But we don't remove old
information that would still be relevant. Old product specific information
goes in the archive category and not search indexed.



"Gary Seven" wrote in message news:16266@public.bootitbm...

I wish Terabyte would update their rather old KB and update the current User
Guides to reflect OS's of the current decade.

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Re: Day 1 BootIt UEFI install to dual boot Win10 & Mint 19.1

Postby brucebne » Mon Jan 21, 2019 12:38 am

Incidentally, for reasons not understood, my wireless mouse is now working in BIU.
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Re: Day 1 BootIt UEFI install to dual boot Win10 & Mint 19.1

Postby Gary Seven » Mon Jan 21, 2019 3:17 am

Brian K wrote:
> Bruce, thanks for those instructions. I'll try it but it's not a priority at present.
>
> >
> > BTW, I've spent many evenings messing with Mint installs over the last 6 years, and learned quickly to put grub on the Linux root partition, rather than the EFI
> > partition.
>
> We can't do that with GPT disks. No matter whether you choose Disk, Linux partition or EFI System partition, grub goes to the EFI System partition. Into \EFI\ubuntu.xxx.
> If you multi-boot several Linux OS you will have \EFI\ubuntu.001, \EFI\ubuntu.002, \EFI\ubuntu.003, etc.

Geez-louise that's EXACTLY the kind of information I've been wondering about and searching for. Thank you Brian!
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Re: Day 1 BootIt UEFI install to dual boot Win10 & Mint 19.1

Postby brucebne » Mon Jan 21, 2019 5:07 am

hmmmm... from Microsoft
https://docs.microsoft.com/en-us/previo ... 35(v=vs.85)

"Each GPT partition has a unique identification GUID and a partition content type, so no coordination is necessary to prevent partition identifier collision."

I just copied and pasted a Linux partition to the same ssd....and it retained the original GUID....so there's identifier collision right there!

edit.....

OK, so each partition does have a unique PARTITION identification GUID.....but OSs recognize partitions by FILE SYSTEM GUIDs, which are not unique when partitions are cloned.
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Re: Day 1 BootIt UEFI install to dual boot Win10 & Mint 19.1

Postby brucebne » Mon Jan 21, 2019 5:24 pm

Brian K wrote:
> Bruce, thanks for those instructions. I'll try it but it's not a priority at present.
>
> >
> > BTW, I've spent many evenings messing with Mint installs over the last 6 years,
> and
> > learned quickly to put grub on the Linux root partition, rather than the EFI
> > partition.
>
> We can't do that with GPT disks. No matter whether you choose Disk, Linux partition
> or EFI System partition, grub goes to the EFI System partition. Into \EFI\ubuntu.xxx.
> If you multi-boot several Linux OS you will have \EFI\ubuntu.001, \EFI\ubuntu.002,
> \EFI\ubuntu.003, etc.


Brian, one of the reasons I thought grub went to root of the Linux partition, as opposed to ESP, is because when I am in Linux Mint, all the boot loader folders are in the Mint partition root
i.e.

/boot/efi/EFI/Microsoft.001/
/boot/efi/EFI/ubuntu/
/boot/efi/EFI/BootIt/
/boot/grub/

and these can be edited and effect changes in boot behavior.

However, Mint's 'disks' program, shows partition 1 (/dev/nvme0n1p1 = EFI System partition) is mounted at /boot/efi/ ......
BUT
when I click on that, nemo opens up /boot/ (on the Mint ext4 partition) and the folders are there.

I am sensing there's much idiosyncratic behaviour in UEFI/GPT.
Though I suppose it is worth understanding because it is likely to be the standard for the next 10-15 years.
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Re: Day 1 BootIt UEFI install to dual boot Win10 & Mint 19.1

Postby Brian K » Mon Jan 21, 2019 5:45 pm

Bruce,

I installed the BootLoader to the EFI System partition. I just checked my Mint partition and I see what you see. In /boot/efi/EFI/ I have

Boot
BootIt
my Microsoft.xxx folders
ubuntu
my ubuntu.xxx folders

There is no grub folder

It's getting beyond me.

Edit.... I do have /boot/grub/
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Re: Day 1 BootIt UEFI install to dual boot Win10 & Mint 19.1

Postby Brian K » Tue Jan 22, 2019 1:51 pm

Bruce,

In BIU I used TBExplorer to look at my Mint partition. The folder /boot/efi/ is empty. Do you see the same?

The .TBI backup of Mint also shows /boot/efi/ is empty.
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Re: Day 1 BootIt UEFI install to dual boot Win10 & Mint 19.1

Postby brucebne » Tue Jan 22, 2019 2:01 pm

Brian K wrote:
> Bruce,
>
> In BIU I used TBExplorer to look at my Mint partition. The folder
> /boot/efi/ is empty. Do you see the same?

Brian, I cannot find TBExplorer.
Guide me how to access it from the BIU desktop.

When I click BIU text editor/open, I am taken to "c:" drive and it has all the boot loader folders.
I presume this is ESP.

I think it is likely from within Linux Mint, ESP is mounted as the boot folder within the Linux file system.
Whether there is a copy of boot folder kept on the OS and ESP partitions isn't clear.
Last edited by brucebne on Tue Jan 22, 2019 2:05 pm, edited 1 time in total.
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