Modern mobile devices have turned into powerful pocket computers, capable of performing tasks that were previously only possible with a desktop PC. One such task is creating bootable media for installing operating systems. The technology Ventoy has become a real breakthrough, allowing you to create multi-boot flash drives without the need for constant formatting. However, many users are wondering: is it possible to run this tool directly from a smartphone, bypassing a computer? The answer is yes, but with important caveats. There is no native Ventoy application for Android, since the app requires direct access to disk sectors and specific drivers that are not available in the standard mobile OS environment. However, enthusiasts have found workarounds using terminal emulators, superuser rights ( Android-smartphone, bypassing the computer?
The answer is yes, but with important caveats. There is no native Ventoy application for Android, since the app requires direct access to disk sectors and specific drivers that are not available in the standard mobile OS environment. However, enthusiasts have found workarounds using terminal emulators, superuser rights (root) and adapters OTG. This process requires technical literacy, but opens up unique opportunities for system administrators and gadget lovers.
In this article we will analyze in detail the architecture of Ventoy, the necessary hardware components and a step-by-step algorithm of actions. You'll learn how to prepare a file system, what commands to enter into the terminal, and what pitfalls you might encounter. We will not use template phrases, but will focus on the real technical nuances that are critical to the successful completion of the operation.
The principle of operation of Ventoy and compatibility with the mobile platform
The key feature Ventoy is that it does not simply write the disk image sector-by-sector, as classic utilities like Rufus or Etcherdo. Instead, the app creates a small hidden partition with its own bootloader, leaving the main space of the flash drive available for writing regular files. You simply copy ISO, WIM, IMG or VHD files to the drive, and the boot menu automatically detects them. On Android, the implementation of this principle is complicated by file system limitations.
The mobile operating system by default mounts external drives in read-only mode for system partitions or with limited access rights to partition tables. For Ventoy to work correctly, it is necessary to perform a low-level write of the boot sector (MBR or GPT) and create a specific directory structure. Without rights root the standard Android file manager will not be able to perform these operations, since they require superuser privileges to access block devices.
There are two main approaches to implementing this task on a smartphone. The first is the use of ready-made images, pre-recorded on a PC, and subsequent management of content from the phone. The second is to fully record the bootloader through a terminal emulator, such as Termux, if you have root access. The second option is much more complicated, but gives complete independence from the computer. It is important to understand that the kernel on which Android is based theoretically supports the necessary tools, but manufacturers often block access to them at the firmware level. Linux, which Android is based on, theoretically supports the necessary tools, but manufacturers often block access to them at the firmware level.
⚠️ Attention: Directly writing boot sectors from a phone carries a high risk of damaging the file system of the flash drive or even the smartphone itself if connected incorrectly. Make sure that your device supports the mode USB OTG Host and has a stable power supply.
Why doesn’t Ventoy have an official application for Android?
Ventoy developers focus on x86 architecture and standard BIOS/UEFI environments. Mobile ARM processors require specific bootloader compilations, and the variety of memory controllers in smartphones makes creating a universal driver extremely difficult. In addition, Google Play security policies strictly limit applications' access to low-level disk operations.
Required equipment and preparation of the software environment
Before you begin manipulation, you need to collect the right set of tools. An error in the preparation phase can cause the process to become deadlocked. You will need not just any flash drive, but a medium with a certain speed and reliability characteristic, since the process of writing the bootloader is sensitive to power failures.
To work with the terminal and run scripts, you will need to install specialized software. Standard Android tools are not sufficient to emulate the environment in which Ventoy init scripts run. We recommend using proven open source tools that have an active support community.
⚠️ Attention: Interfaces and menu names in firmware from different manufacturers (Xiaomi, Samsung, Pixel) may vary. If you do not find the option to enable OTG in the settings, check the latest information for your model in the official user manual.
The following is a list of required components for the successful implementation of the project:
- 📱 Android smartphone or tablet that supports the function
USB OTG(On-The-Go). - 🔌 USB Type-C to USB-A adapter (or USB-C to USB-C cable, if the flash drive is of the appropriate type).
- 💾 USB drive with a capacity of 8 GB or more (USB 3.0 is recommended for image copying speed).
- 🛠️ Application Termux (for terminal emulation) and plugin Termux:API to access USB.
- 🔓 Superuser rights (root) and rights manager, for example, Magisk or SuperSU.
Special attention should be paid to power. Writing data and running the processor under high load quickly drains the battery. If the smartphone turns off while the boot sector is being written, the flash drive may become unreadable. It is recommended to connect the device to the charger via a USB hub, if available, or make sure that the battery charge is at least 80%.
Use a file manager that supports root access, for example MT Manager or Root Explorer, to first check the visibility of the flash drive in the system before starting the terminal. This will save time on debugging paths to devices.
Step-by-step guide: installing Ventoy via Termux
This is the most difficult, but also the most interesting stage. We will use a terminal emulator to run scripts similar to those run on Linux. It is assumed that you have already obtained root access and installed the necessary applications. If your smartphone is not rooted, this method will not work, and you will have to limit yourself to simply copying files to an already prepared flash drive.
First of all, you need to gain access to the console with superuser privileges. Launch the application Termux and enter the command to request rights. The system will ask for confirmation through the root access manager pop-up window - click “Grant”. Without this step, any attempts to write to a block device will be rejected by the system kernel with an error Permission denied.
Next you need to determine how the system sees your flash drive. On Linux-like systems, devices are designated by directory paths /dev. Usually this is /dev/block/sda or /dev/block/mmcblk1. A mistake in choosing a device is fatal: if you choose the internal memory of the phone instead of a flash drive, you will destroy the data on the smartphone. Be extremely careful when entering paths.
☑️ Preparing to record via Termux
The initialization process is as follows. After connecting the flash drive, enter the command ls /dev/block and remember the list of devices. Disconnect the flash drive and enter the command again - the disappeared device is your drive. Let's say this sda. Now you need to download the Ventoy installation script, adapted for the ARM architecture, since the standard script is designed for x86.
sucd /sdcard/Download
sh ventoy.sh -i /dev/block/sda
The script will prompt you to select the type of partition table. For modern systems with UEFI it is better to choose GPTalthough MBR provides better compatibility with older BIOS. After confirmation, the recording process will begin. Progress messages will appear in the console. When completed, you will see a message Install Ventoy Successfully. Now the flash drive is ready to receive images.
A critically important step is to correctly determine the path to the block device of the flash drive. Writing to the wrong path (for example, to internal memory) will lead to complete loss of data on the smartphone without the possibility of recovery.
Alternative method: using ready-made images and file managers
If fiddling with the console and root access seems too risky to you, there is a safer, albeit less flexible, method. The essence of the method is that you prepare a flash drive on your computer once, and then use your smartphone only to manage content. This is an ideal option for those who just need to add a new system image on the go.
Once the flash drive is prepared on the PC, you connect it to the Android device. The file system of a data partition is usually formatted as exFAT or NTFS. Modern versions of Android (starting from 10 and higher) have built-in support NTFS, but some custom firmware may require third-party drivers or file managers that support these formats, for example Microsoft exFAT/NTFS for USB by Paragon Software.
The process of adding images comes down to banal copying of files. You download ISO the image of the desired operating system (Windows 10, Ubuntu, Kali Linux) directly to the phone or transfer it via Wi-Fi, and then drag it to the root of the flash drive or to the created folder. Ventoy will automatically pick up the file the next time you boot from this media.
The advantage of this method is speed and security. You don't risk bricking your phone or flash drive with the wrong command. However, there is a drawback: you cannot change the size of the hidden Ventoy partition or update the bootloader version without connecting to a PC. For most use cases, such as installing Windows or resuscitating the system, this is quite enough.
| Characteristics | Method via Termux (Root) | Method with a ready-made flash drive |
|---|---|---|
| Necessity of a PC | No (complete autonomy) | Required for initial setup |
| Risk of data loss | High (command error) | Minimum |
| Configuration flexibility | Full (change of partition table) | Limited |
| Complexity | High (requires knowledge of Linux) | Low (copying files) |
Working with the file system and image compatibility
After successful installation of the bootloader, the question of file system compatibility arises. Ventoy creates two partitions: a small hidden partition for downloads and a large partition for data. For the data partition, it is critical to choose the correct file system so that images weighing more than 4 GB (which is almost all modern Windows and Linux distributions) are written correctly.
The file system FAT32 has a limit on the size of a single file of 4 GB. If you try to copy a Windows 10/11 image to a FAT32 flash drive, the operation will fail with an error. Therefore, when preparing via a PC or manual marking in Termux, you must select exFAT or NTFS. These formats support huge file sizes and are fully compatible with the Ventoy bootloader.
However, this is where compatibility with Android itself comes into play. Not all phones out of the box can mount NTFS in recording mode. Often they mount such drives as read-only. In this case, you will not be able to copy the image from the phone to a flash drive without installing additional kernel modules or using specialized software that emulates drivers. exFAT in this regard, it is the most universal compromise.
It is also worth mentioning the directory structure. Ventoy allows you to create folders for sorting images. You can put the images in the folder /ISO/Windows/ or /ISO/Linux/. The downloader recursively scans all subdirectories. This is convenient when dozens of different assemblies are stored on one flash drive. Just avoid using Cyrillic and special characters in file names, as the bootloader may interpret them incorrectly in the BIOS environment.
⚠️ Attention: When using the NTFS file system on Android, be sure to remove the flash drive through the "Safely Remove" menu before physically disconnecting it. Interrupting cache writes can lead to damage to the file table and loss of data.
Possible problems and solutions
Even if you strictly follow the instructions, unforeseen situations may arise. The mobile ecosystem is highly fragmented, and what works on one device may not work on another. The most common problem is that the phone simply does not see the flash drive when connected via OTG. This may be due to lack of power or lack of support for the host protocol (Host mode) in the kernel of your firmware.
Another common error is “Device busy” when trying to write through Termux. This means that the Android system has already automatically mounted the USB flash drive to read media files. Before running the installation script, you must unmount the device. In Termux, this can be done with the command umount /mnt/media_rw/XXXX-XXXX, where XXXX is the volume identifier, which can be found through the command mount.
If after recording the flash drive does not boot on the target computer, check the BIOS/UEFI settings. It is often necessary to disable Secure Bootas the Ventoy bootloader may not have a digital signature trusted by the motherboard. Also make sure that the boot priority is the USB drive and not the built-in drive.
In rare cases, the installation script fails with a write error. This may indicate bad sectors of the flash drive or incompatibility of the memory controller with the writing methods used by the script. Try formatting the flash drive to zero using the utility dd before running the Ventoy installation to clear old partition tables.
What to do if Termux does not see the USB device?
Make sure you have installed the Termux:API plugin and given it permissions. Also check if USB debugging is enabled in the developer options. In some cases, manual mounting is required using the mount command indicating the file system type.
Frequently asked questions (FAQ)
Can Ventoy be used on Android without root access?
Full installation of the Ventoy bootloader on a flash drive without root access is impossible, since direct access to the block device is required. However, you can use a flash drive previously prepared on your computer by simply copying ISO images from your phone onto it. This is a limited but workable scenario.
Does Ventoy support loading Android images (Custom ROM)?
Yes, Ventoy supports loading various images, including Android-x86. However, this method is not suitable for installing custom firmware on smartphones (ARM architecture), since phones boot differently than PCs. Ventoy is designed for installing the OS on computers (x86/x64).
What is the maximum flash drive size that Ventoy supports?
Theoretically, Ventoy supports drives up to 2 TB or more. The limit does not depend on the app, but on the file system (exFAT supports up to 128 PB) and the capabilities of your card reader or smartphone.
Is it safe to update the version of Ventoy on a flash drive from your phone?
Updating the bootloader (Update) is theoretically possible through a script in Termux, but the risk of damaging data on the partition with ISO images is high. It is recommended to back up your images before upgrading. It is easier and safer to update on a PC.
Why does the flash drive appear empty after installing Ventoy?
This is normal behavior. Ventoy creates a hidden partition. The main section for data should be visible. If you do not see the data partition, it may not be formatted or the file system is not supported by your Android without additional drivers.