That `lspci` output is extremely revealing... it is almost certainly an **external drive connected via USB or Thunderbolt.**... there is a slightly less dangerous (but still advanced) method we can try first. We can attempt to manually unbind and then rebind the specific USB device from its driver. Here are the commands to run as **root**:

1.  **Find the USB Bus and Device ID:**
    ```bash
    lsusb
    ```

2.  **Find the device's path in the `/sys` filesystem.**
    ```bash
    find /sys/bus/usb/devices/ -maxdepth 2 -name idProduct | xargs -I {} grep -l 5678 {} | xargs -I {} dirname {}
    ```

3.  **Unbind the device from its driver.**
    ```bash
    echo '<device_path>' > /sys/bus/usb/drivers/usb/unbind
    ```

4.  **Rebind the device.**
    ```bash
    echo '<device_path>' > /sys/bus/usb/drivers/usb/bind
    ```

5.  **Check the result:**
    ```bash
    cat /proc/partitions
    ```