> 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/iodd2541-reset-password.md).

# IODD 2541 Password Reset

If the password is lost, you must bypass the IODD controller and connect the internal drive directly to a computer to wipe it. **This will erase all data.**

{% hint style="danger" %}
**Hardware Support Notice** IODD Admin Manager does not support the 2541 model. Manual initialization is the only solution to reset a forgotten password.
{% endhint %}

### 1. Hardware Preparation

1. Disconnect the IODD 2541.
2. Remove the internal 2.5" HDD/SSD from the 2541 case.
3. Connect the drive to your computer using a SATA-to-USB adapter or an internal SATA port.

***

### 2. Initialization by Operating System

#### **Option A: Windows (GUI)**

1. Open **Disk Management** (`diskmgmt.msc`).
2. Delete all existing volumes on the target disk.
3. Right-click the Disk Name (left panel) and select **Initialize Disk** as **GPT**.
4. Right-click again and select **Convert to MBR Disk**. (2541 requires **MBR**).
5. Create a **New Simple Volume** formatted as **NTFS** or **exFAT**.

#### **Option B: macOS (Terminal)**

On macOS, perform a two-step wipe to ensure all encrypted security metadata is removed:

```bash
    # 1. List all disks to find the IODD drive identifier (e.g., /dev/disk4)
    $ diskutil list

    # 2. Step 1: Initialize as GPT first to clear metadata
    # Replace 'diskX' with your actual disk number!
    $ diskutil eraseDisk ExFAT TEMP GPT /dev/diskX

    # 3. Step 2: Re-initialize as MBR (Required for 2541)
    $ diskutil eraseDisk ExFAT IODD MBR /dev/diskX
```

#### **Option C: Linux (Terminal)**

```bash
    # 1. Identify the drive (e.g., /dev/sdb)
    $ lsblk

    # 2. Wipe and create GPT label first
    $ sudo parted /dev/sdX mklabel gpt

    # 3. Finalize with MBR (msdos) label
    $ sudo parted /dev/sdX mklabel msdos

    # 4. Format the partition
    $ sudo mkfs.exfat /dev/sdX1
```

***

### 3. Reassembly & Verification

1. Place the drive back into the IODD 2541 case.
2. Connect it to your PC. The IODD will now act as a "New" device, prompting you to set a fresh password.

{% hint style="warning" %}
**Final Checklist for 2541**

* **Partition Style**: The final state must be **MBR**.
* **File System**: **NTFS** or **exFAT** is highly recommended.
* **Safe Removal**: Always use "Safe Eject" to prevent the **`"ASSERT Fails ArrayOffset"`** (ASSERT Fails ArrayOffset) error.
  {% endhint %}

***