I've been trying to figure this out throughout the day, as seen in the imgburn log.
I was finally able to create a Bios bootable .iso file by copying and pasting a etfsboot.com file from previous builds. I am, however, very curious what I was missing here for UEFI if anyone is able to help.
Boring, sob story about my research:
(without etfsboot.com) I used these settings:
Emulation: None
Boot Image: (bootmgr, bootmgr.efi, boot.sdi, boot.sdi/$boot, etc.)
Platform ID: UEFI
Developer: Microsoft
Load Segment: 07C0
Sectors to Load: (The 'boot Image' file size in bytes / 512 and round up) -OR- (I'd see that a tool says that the first file inside of: ./EFI/Boot/bootx64.efi is offset by 1024 bytes so I'd put 2)
I also clicked '1999' in the 'ISO9660 restrictions' as lightning UK suggested in another post and after about half a dozen .iso files later, I changed to the 'UDF' file system only.
Everything else should be default settings. I installed imgburn on this computer for this 1 project to make use of the ramdisk to save on ssd wear lol.
Thank you for reading.
The custom windows 10 install files that I have that are made via Microsoft Deployment toolkit, I believe. (I took out all of the locale directories for readability).
--- Root Directory:
user@comp:/mnt/win/W10_604.Build$ tree -s -L 1
.
├── [ 128] autorun.inf
├── [ 0] Boot
├── [ 408074] bootmgr
├── [ 1452856] bootmgr.efi
├── [ 0] Deploy
└── [ 0] EFI
3 directories, 3 files
--- Boot/ Directory
user@comp:/mnt/win/W10_604.Build$ tree -I '*.exe.mui|*.ttf' Boot/
Boot/
├── BCD
├── bcd.LOG
├── bootfix.bin
├── boot.sdi
├── memtest.exe
└── Resources
└── bootres.dll
37 directories, 8 files
--- EFI/
user@comp:/mnt/win/W10_604.Build$ tree -I '*mui|*.ttf' EFI/
EFI/
├── Boot
│ ├── bootx64.efi
│ └── en-us
└── Microsoft
└── Boot
├── BCD
├── bcd.LOG
├── memtest.efi
└── Resources
└── bootres.dll
28 directories, 7 files
--- Deploy/Boot/ Directory:
user@comp:/mnt/win/W10_604.Build$ tree -P 'boot*|BCD' -I '*mui' Deploy/Boot/
Deploy/Boot/
├── x64
│ ├── Boot
│ │ ├── BCD
│ │ ├── bootfix.bin
│ │ ├── boot.sdi
│ │ └── Resources
│ │ └── bootres.dll
│ ├── bootmgr
│ ├── bootmgr.efi
│ └── EFI
│ ├── Boot
│ │ ├── bootx64.efi
│ │ └── en-us
│ └── Microsoft
│ └── Boot
│ ├── BCD
│ └── Resources
│ └── bootres.dll
└── x86
├── Boot
│ ├── BCD
│ ├── bg-bg
│ ├── bootfix.bin
│ ├── boot.sdi
│ └── Resources
│ └── bootres.dll
├── bootmgr
├── bootmgr.efi
└── EFI
├── Boot
│ └── bootia32.efi
└── Microsoft
└── Boot
├── BCD
└── Resources
└── bootres.dll
136 directories, 18 files
Log, all from today.