# Error Messages ### 💾 Partition & File System Errors **`"1st Partition: XX"`** (1st Partition: XX) / **`"Unsupported Partition"`** (Unsupported Partition) * **For 2541 / 2531 Models**: Check your firmware version (ending in **N** or **F**). * **N** version: Supports **NTFS** only. * **F** version: Supports **exFAT / FAT32** only. * **For ST400 / ST300 / MINI PRO**: Unified firmware supporting both MBR and GPT. **`"ChkDsk"`** (ChkDsk) / **`"gErr: xxx"`** (Legacy Only) * These are equivalent to the "Drive Error" or "Check HDD" messages on newer models. * **Solution**: Perform a **Disk Check (chkdsk)** on your PC to repair filesystem metadata. **`"Too Many Files"`** (Too Many Files) * The IODD supports a maximum of **32 files or subfolders** within a single folder. * **Solution**: Organize your files into nested subfolders. **`"Enc Ver Err ???"`** (2541 Only) * Encryption version mismatch (e.g., drive encrypted with 6.x firmware but device using 7.x). * **Solution**: Restore firmware to the matching version or re-initialize the drive (Back up data first!). {% hint style="info" %} **Multi-Partition Support** ST/MINI models can mount ISOs from any primary partition. **Hold the \[4] key for 3 seconds** to manually select a different partition. {% endhint %} **`"ASSERT Fails ArrayOffset"`** (ASSERT Fails ArrayOffset) * **Primary Cause**: This error typically occurs when the IODD is **unplugged without using "Safely Remove Hardware"** (Safe Ejection). Failure to eject safely can lead to corrupted filesystem metadata or unwritten cached data. * **First Action (Data Preservation)**: Connect the IODD to a PC and perform a **Disk Check (chkdsk)** to repair the metadata errors caused by improper disconnection. * **Second Action**: If the error persists, you must re-initialize the drive. Refer to [Drive Initialization](/disk-initialization.md). {% hint style="danger" %} **Importance of Safe Removal** To prevent the "ASSERT" error, always use your operating system's **Safely Remove Hardware** or **Eject** function before physically disconnecting the USB cable. This is especially critical when using the **NTFS** file system. {% endhint %} *** ### 🛡️ Security & Access Errors **`"Not Match..."`** (Not Match...) * The entered password does not match. * **Solution**: Ensure you are using the correct admin/user prefix. * **Admin**: `0` + `[Password]` (e.g., `01234`) * **User**: `1~4` + `[Password]` **`"No Extra Devices"`** (No Extra Devices) * No virtual drives are active. * **Solution**: Use the [Mode Configuration](/bootable-virtual-drive/mode-configuration.md) to enable VHD/ISO drives. *** ### ⚙️ Hardware & Performance Errors **`"Check HDD"`** (Check HDD) / **`"Drive Error"`** (Drive Error) * Communication failure with the internal drive. * **Causes**: Physical disk error or **Low Voltage** (unstable power). * **Solution**: Try a different USB port or a Y-cable for stable power. **`"DEFRAG"`** (DEFRAG) * The ISO/VHD file is too fragmented to load (Max 24 fragments for ISO; 0 for VHD). * **Solution**: Use defragmentation utilities like [MyDefrag](http://www.mydefrag.net/) or [Defraggler](https://www.ccleaner.com/defraggler). *** ### 🖥️ LCD Status Message Table Below is a combined table of LCD status and error messages found across various IODD models (ST, MINI, 2541, 2531). | Message | Meaning / Action Required | Affected Models | | ----------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------- | -------------------- | | **`"Please Wait"`** (Please Wait) | Operation in progress. Wait for the message to disappear. | All | | **`"Plug Out / Disconnect"`** (Plug Out / Disconnect) | Safely disconnect the device from the USB port. | All | | **`"Data Saving..."`** (Data Saving...) | Writing configuration or data to the internal drive. **Do not disconnect.** | All | | **`"Flash Update..."`** (Flash Update...) | Updating internal flash memory (Firmware/Font). **Do not disconnect.** | All | | **`"Reconnect USB"`** (Reconnect USB) | Please disconnect and reconnect the USB cable. | Modern (ST/MINI PRO) | | **`"Replug USB..."`** (Replug USB...) | Connection error detected. Please disconnect and reconnect the USB cable. | 2541 | | **`"Check HDD"`** (Check HDD) | Drive check required. A drive error has been detected. | All | | **`"1st partition"`** (1st partition) | Partition mismatch with firmware. The firmware version (NTFS/FAT32/exFAT) does not match the first partition's file system. | All | | **`"bad or N/S HDD"`** (bad or N/S HDD) | Unsupported or faulty drive. The device cannot read the internal drive (check cable or HDD). | All | | **`"NO _ISO Folder"`** (NO \_ISO Folder) | The required directory named `_ISO` was not found in the root. | All | | **`"NO - DISC"`** (NO - DISC) | No compatible files or subfolders were detected inside the `_ISO` folder. | All | | **`"Disc Locked"`** (Disc Locked) | The operating system or an application has locked the virtual drive. | All | | **`"Already Hit"`** (Already Hit) | The selected file is already mounted as a virtual drive. | All | | **`"Input Limit..."`** (Input Limit...) | PIN retry limit exceeded. Reconnect the device to try again. | 2541 / MINI | | **`"Not Match..."`** (Not Match...) | The entered PIN does not match the stored credentials. | 2541 / MINI | | **`"NO DEVICE !!!"`** (NO DEVICE !!!) | Internal HDD/SSD not detected. Check the physical SATA connection. | All | | **`"HDD ERROR !!!"`** (HDD ERROR !!!) | Critical drive read error or hardware failure. | All | | **`"HDD WARNING ???"`** (HDD WARNING ???) | Drive health warning. Bad sectors detected. **Back up data immediately.** | All | | **`"Enc Ver Err ???"`** | Encryption version mismatch (e.g., 6.x vs 7.x firmware). | 2541 | | **`"Too Many Files"`** (Too Many Files) | Maximum of 32 files/subfolders per folder exceeded. | All | | **`"vDISK Limit"`** (vDISK Limit) | Maximum number of virtual drives (LUNs) exceeded. | 2531 / 2541 | | **`"Product Mismatch"`** (Product Mismatch) | Incorrect firmware model selected during update. | All | | **`"DEFRAG"`** (DEFRAG) | File fragmentation detected (Max 24 fragments for ISO, 0 for VHD). | All | | **`"No Use Dynamic"`** (No Use Dynamic) | Dynamic VHD files are not supported. Only fixed-size VHD is allowed. | All | | **`"No Use Sparse"`** (No Use Sparse) | Sparse files are not supported by the IODD system. | All | #### 📁 "Excep\_code" Error Reference Some newer models (ST/MINI PRO) may display a red popup with an **`"Excep_code"`**. Follow the specific instructions in the message: | Exception Code | Meaning / Action Required | | ------------------------------------------- | -------------------------------------------------------------------------------------------------------------------- | | **`"Excep_code - Please Reconnect"`** | Often caused by poor connection or insufficient power. Try a different USB port. | | **`"Excep_code - Please Check Disk"`** | File system corruption detected. Run `chkdsk X: /f` on your PC. | | **`"Excep_code - Please update firmware"`** | Critical system error. Re-flash the firmware using the [Firmware Update Guide](/troubleshooting/firmware-update.md). | *** ### Terminal Diagnostics (Windows) If you encounter the "ASSERT" error, run the following command in Command Prompt (Admin) to repair the filesystem: ```bash # Replace 'X:' with your IODD drive letter chkdsk X: /f ``` --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://help.iodd.kr/troubleshooting/error-messages.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. 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