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To understand how Ventoy works "under the hood," it’s best to compare it to how traditional USB bootable tools work.

In a standard setup (like using Rufus or BalenaEtcher), you "burn" an ISO file to a USB. This process reboots the entire USB drive to match the filesystem of that specific ISO. If you want a different OS, you have to format the drive and start over.

Ventoy changes the game by acting as a middleman. Here is the simple breakdown of its internal logic:
1. The Partition Split

When you "install" Ventoy to a USB drive, it hides itself by splitting the drive into two distinct parts:

    Part A (The Small Hidden Partition): This is a tiny, hidden boot partition (usually formatted as FAT). It contains the Ventoy bootloader and the logic needed to start the computer.

    Part B (The Large Storage Partition): This is the rest of your drive (usually formatted as ExFAT or NTFS). This is where you simply drag and drop your ISO files like regular documents.

2. The Bootloader Handshake

When you plug the USB into a computer and turn it on, the computer's BIOS/UEFI looks at the USB and finds the Ventoy bootloader in that small hidden partition.

Instead of loading a Windows or Linux installer immediately, Ventoy starts its own mini-operating system (based on GRUB). It then scans your "Storage Partition" for any files ending in .iso, .wim, or .img and displays them in a menu.

3. The "Hooking" Trick (The Secret Sauce)

This is the most technical part. Normally, an ISO file expects to be "burned" onto a physical disk. If you just try to run an ISO file as a file, the OS installer will eventually "lose" the file because it doesn't know how to look inside a filesystem to find itself.

Ventoy uses a "Hooking" strategy:

    Once you select an ISO, Ventoy creates a Virtual Disk in the computer's memory.

    It "tricks" the computer into thinking that the ISO file you selected is actually a physical DVD or hard drive plugged into the machine.

    It stays active in the background while the installer runs, providing the data from the ISO file whenever the installer asks for it.

Why this is better

    No Formatting: You can put your personal photos and work documents on the same USB drive as your bootable ISOs.

Bypass Restrictions: Ventoy includes "plugins" that can automatically bypass Windows 11 hardware checks (TPM/Secure Boot) by injecting code into the installer as it boots.

Multi-Platform: It supports Legacy BIOS and modern UEFI simultaneously.

Would you like me to walk you through how to add custom themes or bypass Windows 11 system requirements using Ventoy?


Gemini can make mistakes, so double-check it

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