> 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/various-functions/s.m.a.r.t-information.md).

# S.M.A.R.T / Information

Maintaining the health of your internal drive and staying updated with the latest firmware is crucial for data integrity. The IODD provides built-in tools to monitor these statuses directly on its display.

### S.M.A.R.T. Disk Information

S.M.A.R.T (Self-Monitoring, Analysis, and Reporting Technology) allows you to check the diagnostic health of your internal HDD or SSD.

1. Press the **\[Menu]** button and navigate to: **\[Information] - \[S.M.A.R.T]**.

   <figure><img src="/files/bKRkFRPJGjWone7gynbp" alt="S.M.A.R.T Menu"><figcaption><p>Accessing the disk diagnostic tool.</p></figcaption></figure>

{% hint style="info" %}
**Understanding Health Status**

* **HDD Health**:
  * `<< Good >>`: The drive is healthy and operating normally.
  * `<< Warning >>`: Potential issues detected. Back up your data and consider replacement.
  * `<< Bad >>`: Critical failure imminent. Replace the drive immediately.
* **HDD Model**: Displays the manufacturer's model name.
* **HDD Serial**: Displays the unique serial number of the drive.
  {% endhint %}

{% hint style="danger" %}
**Power Stability Warning** If the **USB voltage is insufficient or unstable**, S.M.A.R.T. information may be displayed incorrectly or fail to load. Always ensure a stable connection. For more details, refer to: [Voltage Check](/disk-initialization.md#voltage-check)
{% endhint %}

***

### IODD Information

You can check the specific details of your IODD hardware, including the current firmware version and hardware revision.

1. Press the **\[Menu]** button and navigate to: **\[Information] - \[Product Info]**.

   <figure><img src="/files/YJZW9Nz56UOWDiCSjbd0" alt="IODD Information Menu"><figcaption><p>Checking the device hardware and firmware version.</p></figcaption></figure>

{% hint style="info" %}
**Key Device Status Indicators**

* **Firmware Ver**: Current IODD firmware version.
* **USB Speed**: Currently connected speed (Full/Hi/Super Speed).
* **USB Lowest Volt**: The absolute lowest voltage detected since the device was connected. This is the most important indicator of power stability.
* **Current Voltage**: The real-time BUS voltage currently being supplied.
  {% endhint %}

***

### Advanced Hardware Check (Linux/macOS)

If you need a more detailed diagnostic log while the IODD is connected to a computer, you can use terminal commands:

```bash
    # On macOS, check disk utility list for basic health info
    $ diskutil list
    
    # On Linux, use smartctl for detailed reports (requires smartmontools)
    $ sudo smartctl -a /dev/sdX
```