> For the complete documentation index, see [llms.txt](https://help.iodd.kr/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.iodd.kr/troubleshooting/booting-error.md).

# Booting Error

Troubleshooting guide for common booting issues and hardware compatibility.

If your computer fails to boot from the IODD, please follow this troubleshooting checklist to identify and resolve the issue.

### 📋 Troubleshooting Checklist

{% hint style="info" %}
**ISO & Media Validation**

* **Verify Bootability**: Ensure that the ISO file you are using is a bootable image. Non-bootable data ISOs will not trigger a boot sequence.
* **Hardware Comparison**: If a bootable ISO fails, try testing it with a physical USB DVD-ROM to confirm if the issue is with the ISO file itself or the system's compatibility.
  {% endhint %}

{% hint style="warning" %}
**Drive & System Configuration**

* **Multi-LUN Support**: Some older PCs do not support multiple Logical Unit Numbers (LUN). If the IODD is not recognized, configure it as a single drive in the **Mode Configuration** settings.
* **Internal DVD Conflict**: If your laptop has an internal DVD-ROM, it may conflict with the IODD. Disable the internal drive in the BIOS settings or physically remove it if necessary.
  {% endhint %}

{% hint style="danger" %}
**Power Supply Issues** The IODD is a high-performance, bus-powered USB device. If your computer's USB port provides unstable power, the boot process may fail.

* **Solution**: Use a **USB Y-Cable** to draw additional power from a second USB port.
  {% endhint %}

{% hint style="warning" %}
**OS & Platform Compatibility** Newer hardware platforms may lack the necessary drivers for older operating systems.

* **Example**: You cannot install a genuine Windows 7 on the **Skylake** (or newer) platform using a USB DVD-ROM device without injecting proper USB 3.0/XHCI drivers into the ISO.
  {% endhint %}

***

### Advanced Hardware Check (Linux/macOS)

You can check if the IODD is correctly being recognized as a bootable optical or mass storage device via the terminal:

```bash
    # On macOS, check if the disk is listed as external and bootable
    $ diskutil list
    
    # On Linux, check the device type and partitions
    $ lsblk
```