# Basic Control / Function Keys ### IODD ST300/400, MINI PRO, MINI (Legacy) The physical keypad on your IODD allows for quick navigation and advanced power-user shortcuts. Understanding these keys will significantly improve your workflow. ### 1. Basic Control (Press Key Once) #### ⌨️ For Models with Keypad (ST300/400, MINI PRO, MINI, LK100) | Key | Function | Description | | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ----------- | -------------------------------------------------------------- | | ![](https://3026209848-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FhmDmKL86eZmYvioTSXe5%2Fuploads%2Fj8lYcBiURUSI28Fnk0g9%2Fimage.png?alt=media\&token=06665e7a-93a2-4e3f-bbd4-87979d3fb498) **\[1]** | **Rescan** | Rescans the root folder for new files. | | ![](https://3026209848-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FhmDmKL86eZmYvioTSXe5%2Fuploads%2FRjKlhxJLaEAI1FqHacDq%2Fimage.png?alt=media\&token=84d7ef9f-2b59-4426-b99f-da7a3fb9b151) **\[2]** | **Up** | Moves up in the file or item list. | | ![](https://3026209848-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FhmDmKL86eZmYvioTSXe5%2Fuploads%2F4fDl4a0iXjdduZRpAipr%2Fimage.png?alt=media\&token=10106d9f-73d3-45a1-b780-7b39f31814e5) **\[3]** | **Voltage** | Displays the **VBUS minimum voltage** (Crucial for stability). | | ![](https://3026209848-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FhmDmKL86eZmYvioTSXe5%2Fuploads%2FyNjXcAqcM9vUwEwlEp5S%2Fimage.png?alt=media\&token=531e0c92-560d-45fe-85c3-85ad1a12f99f) **\[4]** | **Back** | Goes to the parent folder. | | ![](https://3026209848-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FhmDmKL86eZmYvioTSXe5%2Fuploads%2F43pzkeFBK3AnlowKY0Ev%2Fimage.png?alt=media\&token=9cb6fe5a-c341-4c69-bee2-188776c475e2) **\[5]** | **Info** | View detailed file information (size, fragmentation, etc.). | | ![](https://3026209848-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FhmDmKL86eZmYvioTSXe5%2Fuploads%2Fj5fo6RSFL7bsgrogCEIu%2Fimage.png?alt=media\&token=4c01a0c4-9b5c-4e4c-a9a5-f415a262c96a) **\[6]** | **Select** | Selects a file to mount or enters a folder. | | ![](https://3026209848-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FhmDmKL86eZmYvioTSXe5%2Fuploads%2Fi1jyiCmjgJDQqiYCulPz%2Fimage.png?alt=media\&token=87d552db-6aed-464f-b8d8-487d6573ca10) **\[7]** | **Eject** | Ejects the most recently mounted virtual drive. | | ![](https://3026209848-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FhmDmKL86eZmYvioTSXe5%2Fuploads%2FgYlFp6nAGFXALz1szyHj%2Fimage.png?alt=media\&token=10b7edb4-489a-44ec-b94f-8b3785ac7971) **\[8]** | **Down** | Moves down in the file or item list. | | ![](https://3026209848-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FhmDmKL86eZmYvioTSXe5%2Fuploads%2F2lGZD9v6fHWMMJAjsWfF%2Fimage.png?alt=media\&token=8c43ae47-7d0f-427e-8d4e-f1696481ef6b) **\[9]** | **Save** | Saves the current mount state (Auto-mounts on next boot). | | ![](https://3026209848-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FhmDmKL86eZmYvioTSXe5%2Fuploads%2Fyi6q65Y5T1dFalRLKVCu%2Fimage.png?alt=media\&token=c0ca279f-b062-4ac5-a506-94ed37361017) **\[M]** | **Menu** | Enters or exits the system settings menu. | | ![](https://3026209848-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FhmDmKL86eZmYvioTSXe5%2Fuploads%2Fm710rPn6DkxUzUpOeHMf%2Fimage.png?alt=media\&token=1d9540fc-e89d-4205-b0e4-e0bc75bb9c60) **\[0]** | **Help** | Accesses the built-in Help menu or active error details. | | ![](https://3026209848-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FhmDmKL86eZmYvioTSXe5%2Fuploads%2FJNeT6BltA34dwCHpG1tn%2Fimage.png?alt=media\&token=84361d42-8377-4b23-b353-d09212c68530) **\[Enter]** | **Select** | Same function as Key \[6]. | ### 2. Advanced Hotkeys (Long Press - 3 Seconds) For the **ST300/400, MINI PRO, MINI (Legacy)**, holding a key for 3 seconds triggers advanced maintenance functions: | Key | Function | Description | | -------- | ------------------- | ------------------------------------------------------------------------------- | | **\[1]** | **Reconnect** | Restarts the USB connection without physical removal. | | **\[3]** | **WP Reconnect** | Reconnects with **Write-Protection** enabled for all drives. | | **\[4]** | **Partition List** | Displays all partitions; allows manual selection of the default data partition. | | **\[7]** | **Detach All** | Reconnects with all virtual drives (ISO/VHD/IMA) unmounted. | | **\[9]** | **Sleep Mode** | Safely detaches the USB connection and enters power-saving sleep mode. | | **\[0]** | **Temp Disable WP** | Reconnects with Write-Protection **temporarily disabled**. | ### 3. Startup Keys (Hold while connecting USB) These keys must be held **before and during** the insertion of the USB cable: | Key | Mode / Function | Description | | ------------------- | --------------------- | --------------------------------------------------------------------------- | | **\[1]** | **Factory Reset** | Resets all settings (LCD bright, standby time, etc.) to defaults. | | **\[3]** | **WP Mode** | Starts the device in a global Write-Protected state. | | **\[5]** | **Standalone** | Operates the IODD using external power without a PC connection. | | **\[7]** | **Unmount All** | Ensures no virtual drives are loaded upon startup. | | **\[M]** | **Standalone Menu** | Enters the system settings menu in Standalone Mode. | | **\[0]** | **Key Info** | Displays a list of available startup keys on the screen. | | **\[9] + \[Enter]** | **Firmware Recovery** | **Force Recovery:** Hold both keys for 7s to re-flash the current firmware. | #### 🔘 For IODD 2531 (Jog Dial) * **Jog Up/Down**: Moves the cursor through the file list or menu items. * **Jog Click (Center)**: Selects a file or enters a folder. * **Back Button (Side)**: Moves to the parent folder or exits the current menu. #### 👆 For IODD 2541 (Touch Keys) The 2541 features a 12-button capacitive touch interface. Operation is identical to the physical keypad models, but requires a light touch rather than a press. * **\[2] / \[8]**: Up / Down navigation. * **\[6] / \[Enter]**: Select / Mount. * **\[4]**: Back / Exit. *** {% hint style="info" %} **Correct Startup Sequence** 1. Hold the desired key firmly. 2. Plug in the USB cable. 3. Release the key once the IODD logo appears. {% endhint %} *** ### Terminal Verification ```bash # Monitor kernel messages for USB reconnects/errors $ dmesg -w | grep -i usb ```