FAQ

Frequently Asked Questions and solutions for IODD devices.

🔐 Password & Security

I entered the correct password, but it says "Incorrect."

You must enter the user identification prefix before your password.

• Admin: Enter 0 + [Your Password]. (e.g., if your password is '1234', enter '01234')

• Users: Enter 1~4 + [Your Password]. Refer to: Encryption Guide

I forgot my password. Can I recover my data?

No. It is absolutely impossible for anyone, including the manufacturer, to recover or find a forgotten password. The data is hardware-encrypted.

I forgot my password. How can I reuse the IODD?

The only way to reuse the device is to Reset Password. All existing data will be permanently lost during this process.

• 2541 : 2541 Reset Password

• MINI : MINI Reset Password

• ST400, LK100 : ST400 Reset Password

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📂 Drive & File Management

Data intermittently disappears or partitions are initialized.

This is almost always caused by insufficient voltage.

1. Connect the IODD directly to the USB ports on the back of the PC.

2. Use a USB Y-cable for additional power.

3. Ensure your USB cable is shorter than 50cm.

4. Large-capacity SSDs (2TB+) require significantly more power.

The error "ASSERT Fails ArreyOffset" appeared.

This is usually caused by improperly disconnecting the IODD (not using "Safely Remove Hardware").

1. Connect to a PC and run a Disk Check (chkdsk).

2. If the error persists, you must re-initialize the drive. Refer to: Drive Initialization

How do I unmount virtual drives (VHD, ISO, RMD)?

• Unmount All: Hold the [7] key for 3 seconds.

• Individual Unmount: Move the cursor to the mounted drive and press [Enter].

• Quick Unmount: Press the [7] key briefly to unmount the most recently selected drive.

VHD Tool++ cannot create a VHD.

1. The tool only works on the internal drive of the IODD.

2. The partition must be in NTFS, EXFAT format during the creation process.

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💻 Booting & Hardware

The IODD will not boot or the PC can't see the ISO.

A) Verify your BIOS/UEFI boot order and settings. B) Ensure the ISO is bootable. C) Refer to the Booting Error Guide or use the UEFI Boot Method.

The LCD only displays the IODD Product Number.

This indicates a firmware-related state. Please perform a Firmware Update.

Unable to write files to the IODD drive.

Check if Write Protection is enabled.

• Menu: [USB Control] -> Uncheck [Write Protect].

• Hotkey: Hold the [0] key for 3 seconds to reconnect with Write Protection temporarily disabled.

Is there a capacity limit for the drive?

• ST400 / 300 / LK100 / MINI: No limit. (Note: 2TB+ SSDs require stable/external power).

• 2541 / 2531: 2TB limit when using virtual drive functions. (No limit if using encryption only).

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⚠️ Important Warnings

[!CAUTION] OS Installation Safety During OS installation, users sometimes accidentally select the IODD's internal drive as the "Target Drive," causing an "Unsupported Partition" error. Always enable Write Protection on your IODD before starting an OS installation to prevent accidental data overwrites.

[!WARNING] Voltage Check If your IODD is behaving erratically, use the following command (on Linux) to check if the USB device is resetting due to power drops:

    # Monitor USB bus resets and power issues
    $ dmesg -w | grep -i usb