Thus, extracting Windows installation ISO content to different partition without modification would be a better solution. Extracting all contents from different Windows installation ISOs to different folders in same partition is theoretically possible, however extra manipulation on each boot.wim are needed to make sure correct install.wim can always be found (Windows installation ISOs have very much similar file tree hierarchy from DVD_ROM root). Boot Windows ISO directly via GRUB2 is not always successful in both BIOS and UEFI (details later), so putting all Windows ISOs in same partition can’t be an option. Most Linux Distro ISO can be booted directly via GRUB2, so putting all these ISOs in same partition won’t be a problem.

Multiple primary partition support is “better to have” instead of “must have”. Partition Table:Īs long as there’s an ESP (EFI system partition), both MBR and GPT disk can be used. GRUB2 can support both BIOS and UEFI systems (different boot sequence) so there’s no gap in bootloader choosing.

Able to chainloader other bootloader or OS installer.

Multiple partitions to hold different OS installation source.The universal USB drive should at least meet below criteria: This article introduce a complete manual way to customize a multi-OS installation USB drive based on GRUB, providing multiple Linux & Window installation on a single USB drive. The question is: how to make it “universally” and “compatible” with both BIOS and UEFI systems for different OSs. There’re also guides around the internet explain the manual steps. There’re already many user friendly tools to customize a multi-OS installer (Rufus, WinUSB).

GNU GRUB2 (not GRUB Legacy) is very powerful to act as the universal bootloader on a USB drive to install OSs from.

Instal Clonezilla Live 3.1.1-27 free