How to recover data from TerraMaster D2-300 D2 Clone NAS

Is your network drive gone, and you are wondering what to do? Has a RAID system crashed, and your files are no longer accessible? Does your device display an error while booting? Have you accidentally rebuilt your RAID system? Are several hard disks out of order?

How to recover data from NAS TerraMaster D2-300 D2 Clone

TerraMaster D2-300 D2 Clone NAS Data Recovery in 2024

In this step-by-step tutorial, we’ll show you how to rebuild your RAID and recover data from D2-300 D2 Clone.

How to recover data from NAS TerraMaster D2-300 D2 Clone

Recover data from damaged RAID arrays inaccessible from a computer.

Why can’t ordinary software tools restore files from RAID?

Conventional hard disks keep user’s data by writing it to their surface in a consecutive way, and this is how an entire file is stored on a single hard disk. However, when data is written to a RAID system, a file is divided into several parts. Then these parts are written consecutively to all hard disks within such array. The size of such parts may range from 2 KB to 2 MB, so each file is stored on several hard disks at the same time.

Such approach helps to speed up read and write operations, and it is evident that saving two parts of a file having the size of 1 GB to two hard disks simultaneously is much faster than saving the same 1 GB of data to one hard disk. However, this peculiarity makes file recovery more complicated.

Various RAID levels store information in different ways. Additionally, manufacturers like TerraMaster also introduce some modifications to this process, and that is why data can be written to hard disk in a wide variety of ways.

Are there any preventive measures to minimize the risk of data loss on NAS TerraMaster D2-300 D2 Clone devices?

Yes, there are several preventive measures you can take to minimize the risk of data loss on NAS TerraMaster D2-300 D2 Clone devices:

  1. Regular Backup: Implement a regular backup strategy to ensure that your data is backed up on another storage device or cloud storage. This will help you recover your data in case of any data loss or device failure.
  2. RAID Configuration: Configure your NAS device in RAID mode, such as RAID 1 or RAID 5, which provides data redundancy. This means that even if one drive fails, your data will still be accessible from the remaining drives.
  3. Uninterruptible Power Supply (UPS): Connect your NAS device to an uninterruptible power supply (UPS) to protect it from power surges, fluctuations, or sudden power outages. This will prevent any potential damage to the device and data loss.
  4. Regular Firmware Updates: Keep your NAS device's firmware up to date by regularly checking for and installing any available updates. Firmware updates often include bug fixes and security patches that can help prevent data loss.
  5. Secure Network: Ensure that your NAS device is connected to a secure network and that you have implemented proper security measures such as strong passwords, firewall settings, and regular network monitoring. This will help protect your data from unauthorized access or cyberattacks.
  6. Physical Security: Place your NAS device in a secure location to prevent physical damage or theft. Additionally, ensure that only authorized personnel have access to the device to minimize the risk of data loss.

By implementing these preventive measures, you can significantly reduce the risk of data loss on your NAS TerraMaster D2-300 D2 Clone devices.

How to take hard disks out of the NAS and connect them to a PC?

Although NAS D2-300 D2 Clone can be accessed over the network, you still need to take the hard disks out of the storage device and connect them to a Windows computer. Only in this case will the software be able to scan them properly. Here is what you should do:

  1. Turn off the storage and disconnect it from the power supply.

    WARNING! Before you start taking hard disks out of your NAS device, read the manual carefully. Incorrect actions may damage your network-attached storage and/or the hard disks within the RAID system.

  2. Take the hard disks out of the NAS one by one, carefully removing them from their slots. Remember that the disks are extremely vulnerable: hitting or dropping them may result in serious physical damage.

  3. Make sure to mark each hard disk in accordance with how they were installed inside the NAS.

  4. Remove the hard disks and connect them to the computer. In this video, we have explored what ports are used to connect hard disks, and what to do if there are not enough ports or connectors.

    Go to view
    How to Order Remote Data Recovery

    How to Order Remote Data Recovery

Restoring data with Hetman RAID Recovery

Hetman Raid Recovery

This program recovers data from damaged RAID arrays and is fully compatible with TerraMaster D2-300 D2 Clone. The hard disks that make up the RAID contain technical information about the algorithm used to save files. When launched, Hetman RAID Recovery reads this information and puts the damaged array together. Then you can open the disk and save your files. Also, you can recover the files accidentally deleted from the network drive.

Go to view
How to recover data from a TerraMaster

How to recover data from a TerraMaster

D2-300 D2 Clone has 2 HDD slots, and it supports the following array types:

  • RAID 0;
  • RAID 1;
  • JBOD;

NAS supports:

  • Ext2;
  • Ext3;
  • Ext4;
  • Btrfs;

Safe recovery from disk images

This utility lets you save an entire copy of the disk to file and then work with this image instead of the actual disk. Such feature helps to protect data on the disk from:

  • Overwriting during the recovery process;
  • Loss resulting from bad sectors;
  • User mistakes.

To create an image, do the following:

  1. Make sure that you have enough free space to save the image. The image file size usually equals the disk size.

  2. Select the disk in the main window, and choose from the menu ToolsSave Disk. You can select multiple disks to be saved.

  3. When the image creation wizard starts, you can choose to save the entire disk or select only a part of it. Specify the parameters and click Next.

    Hetman Raid Recovery: Image Creation Wizard
  4. At this stage, you need to choose a directory where to save the image. Choose any disk connected to this PC, or save the image by FTP.

    Hetman Raid Recovery: hoose any disk connected to this PC, or save the image by FTP

Where are user’s files stored?

The TerraMaster D2-300 D2 Clone network-attached storage keeps OS Linux operating system files on a separate RAID 1 (mirrored) array. Usually, all NAS systems create several volumes on every hard disk, and the first of them takes up to 2 Gb of space. This is where operating system files are stored. Other volumes are united into a RAID array where user’s data is written.

Comparison of software for RAID recovery

Product Operating system License type RAID controller support Supported file systems Virtual RAID controller support Data recovery from damaged RAID File preview
Hetman RAID Recovery Windows Paid Yes, over 100 controllers FAT, NTFS, Ext2/3/4, HFS+ Yes Yes Yes
DiskInternals RAID Recovery Windows Paid Yes, over 100 controllers FAT, NTFS, Ext2/3/4, HFS+ No Yes Yes
R-Studio Windows, Mac, Linux Paid Yes, over 200 controllers FAT, NTFS, Ext2/3/4, HFS+ Yes Yes Yes
UFS Explorer RAID Recovery Windows, Mac, Linux Paid Yes, over 1,000 controllers FAT, NTFS, Ext2/3/4, HFS+ Yes Yes Yes
EaseUS Data Recovery Windows Paid Yes, over 20 controllers FAT, NTFS, Ext2/3/4, HFS+ No Yes Yes
ReclaiMe Free RAID Recovery Windows Free Yes, over 100 controllers FAT, NTFS, Ext2/3/4, HFS+ Yes Yes Yes


We will be happy to answer your questions!

Comments (3)

  • Hetman Software: Data Recovery
    Hetman Software: Data Recovery 9.08.2022 12:31 #
    If you want to ask a question about data recovery, from NAS D2-300 D2 Clone, feel free to leave a comment!
  • Edison Burbidge
    Edison Burbidge 10.09.2023 19:44 #
    Can data recovery from a NAS TerraMaster D2-300 D2 Clone device be performed if there are issues with the firmware or device settings?
    • Hetman Software
      Hetman Software 10.09.2023 21:00 #

      Yes, data recovery from a NAS TerraMaster D2-300 D2 Clone device can be performed even if there are issues with the firmware or device settings. In such cases, the data recovery process typically involves connecting the NAS device's hard drives to a computer and using specialized data recovery software to access and retrieve the data directly from the drives. This method bypasses the device's firmware and settings, allowing for data recovery regardless of any issues with the device itself. It is important to note that data recovery from a NAS device can be a complex and delicate process, so it is recommended to consult with a professional data recovery service if you are not familiar with the process.

Post comment
Leave a reply
Your email address will not be published. Required fields are marked *

Vladimir Artiukh

Author: Vladimir Artiukh, Technical Writer

Vladimir Artiukh is a technical writer for Hetman Software, as well as the voice and face of their English-speaking YouTube channel, Hetman Software: Data Recovery for Windows. He handles tutorials, how-tos, and detailed reviews on how the company’s tools work with all kinds of data storage devices.

Oleg Afonin

Editor: Oleg Afonin, Technical Writer

Oleg Afonin is an expert in mobile forensics, data recovery and computer systems. He often attends large data security conferences, and writes several blogs for such resources as, Elcomsoft and Habr. In addition to his online activities, Oleg’s articles are also published in professional magazines. Also, Oleg Afonin is the co-author of a well-known book, Mobile Forensics - Advanced Investigative Strategies.


Questions and answers

  • What is iSCSI and how does it work?

    iSCSI stands for Internet Small Computer System Interface. It is a protocol that allows SCSI (Small Computer System Interface) commands to be transmitted over an IP network, enabling remote storage devices to appear as if they are locally attached to a computer.

    iSCSI works by encapsulating SCSI commands within IP packets, which are then transmitted over a TCP/IP network. It uses the client-server model, where the iSCSI initiator (client) sends SCSI commands to the iSCSI target (server) over the network.

    The iSCSI initiator software runs on the client side and is responsible for establishing a connection with the iSCSI target. It sends SCSI commands to the target and receives the corresponding data or response. The iSCSI target software runs on the server side and handles the incoming SCSI commands, processing them as if they were local commands.

    To establish a connection, the iSCSI initiator and target negotiate parameters such as authentication, security, and target identification. Once the connection is established, the initiator can perform various SCSI operations like reading, writing, or executing commands on the remote storage device.

    iSCSI allows organizations to leverage existing IP networks for storage purposes, eliminating the need for dedicated storage networks. It provides flexibility, scalability, and cost-effectiveness compared to traditional Fibre Channel-based storage networks.

  • What are the advantages of using iSCSI for network storage?

    There are several advantages of using iSCSI for network storage:

    1. Cost-effective: iSCSI leverages existing Ethernet infrastructure, eliminating the need for specialized Fibre Channel (FC) hardware. This makes it a more cost-effective solution for network storage.
    2. Scalability: iSCSI allows for easy and seamless scalability. It can support large storage arrays and accommodate growing storage needs without significant infrastructure changes.
    3. Flexibility: iSCSI can be used with a wide range of operating systems and platforms, making it a versatile solution for network storage. It also supports both block-level and file-level storage, providing flexibility in storage configurations.
    4. Performance: iSCSI offers high-performance storage access over Ethernet networks. With advancements in network speeds and technologies, iSCSI can deliver comparable performance to Fibre Channel, especially with the use of high-speed Ethernet connections.
    5. Centralized management: iSCSI provides centralized management capabilities, allowing for easy configuration, monitoring, and maintenance of storage resources. This simplifies storage administration and improves overall efficiency.
    6. Data protection: iSCSI supports various data protection mechanisms, including RAID (Redundant Array of Independent Disks) and snapshot capabilities. These features help ensure data availability and protect against data loss.
    7. Remote access: iSCSI enables remote access to storage resources, allowing for efficient data replication, disaster recovery, and remote backup. It facilitates data mobility and enables organizations to have geographically distributed storage systems.
    8. Compatibility: iSCSI is compatible with existing IP-based networks, making it easier to integrate with existing infrastructure. It can coexist with other network services and applications without conflicts.

    Overall, iSCSI provides a cost-effective, scalable, and flexible solution for network storage, with good performance and data protection capabilities.

  • Does the NAS TerraMaster D2-300 D2 Clone support iSCSI protocol for storage connectivity?

    Yes, the NAS TerraMaster D2-300 D2 Clone does support the iSCSI protocol for storage connectivity.

Hello! This is AI-based Hetman Software virtual assistant, and it will answer any of your questions right away.
Start Chat