How to Repair and Recover a Faulty RAID Array from NAS Digiever DS-2105 UHD

Our guide provides the tools and techniques needed to recover a faulty RAID array from ⭐ NAS.

How to Repair and Recover a Faulty RAID Array from NAS Digiever DS-2105 UHD

Digiever DS-2105 UHD NAS Data Recovery in 2024

In this step-by-step tutorial, we’ll show you how to rebuild your RAID and recover data from DS-2105 UHD.

How to Repair and Recover a Faulty RAID Array from NAS Digiever DS-2105 UHD

RAID Recovery™ 2.6
Recover data from damaged RAID arrays inaccessible from a computer.
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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 Digiever also introduce some modifications to this process, and that is why data can be written to hard disk in a wide variety of ways.

What is a NAS Digiever DS-2105 UHD (Network Attached Storage) device?

The Digiever DS-2105 UHD is a Network Attached Storage (NAS) device manufactured by Digiever. NAS devices are storage devices that are connected to a network and provide centralized storage and file sharing capabilities to multiple users and devices on the network.

The DS-2105 UHD is specifically designed for Ultra HD surveillance applications. It is equipped with multiple hard drive bays, allowing users to install and manage multiple hard drives for storage purposes. It supports RAID configurations for data redundancy and protection.

The NAS device is integrated with Digiever's VMS (Video Management Software), providing advanced video surveillance functionalities such as live viewing, video playback, remote access, and video analytics. It is capable of handling high-resolution video streams and offers scalable storage capacity to meet the needs of surveillance systems.

Additionally, the DS-2105 UHD supports various network protocols and features, including FTP, SMB/CIFS, NFS, iSCSI, and more. It also offers data backup and synchronization options, ensuring data integrity and availability.

Overall, the Digiever DS-2105 UHD NAS device is designed to provide reliable and efficient storage solutions for Ultra HD surveillance systems, offering centralized storage, advanced video management capabilities, and data protection features.

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

Although NAS DS-2105 UHD 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 Digiever DS-2105 UHD. 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 Digiever

How to recover data from a Digiever

DS-2105 UHD has 2 HDD slots, and it supports the following array types:

  • RAID 0;
  • RAID 1;
  • JBOD;

NAS supports:

  • exFAT, VFAT, FAT 12 / 16 / 32;
  • NTFS / ReFS;
  • APFS / HFS+;
  • Ext2 / 3 / 4 / ReiserFS / XFS / UFS / ZFS / Btrfs;
  • VMFS / HikvisionFS;

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 Digiever DS-2105 UHD 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

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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 DS-2105 UHD, feel free to leave a comment!
  • Russell Hackett
    Russell Hackett 25.08.2023 06:38 #
    Can data recovery from a NAS Digiever DS-2105 UHD device be done if the device is showing signs of overheating or cooling fan failure?
    • Hetman Software
      Hetman Software 25.08.2023 06:59 #

      If a NAS device like the Digiever DS-2105 UHD is showing signs of overheating or cooling fan failure, it is recommended to address these hardware issues first before attempting any data recovery. Overheating can lead to further damage to the device and potentially cause data loss.

      You should try the following steps:

      1. Ensure proper ventilation: Make sure the NAS device is placed in a well-ventilated area and not obstructed by any objects. Ensure that the cooling vents are clear and not blocked.
      2. Check the cooling fan: If the cooling fan is not functioning or making unusual noises, it may need to be replaced. Contact the manufacturer or a professional technician to diagnose and replace the fan if necessary.
      3. Monitor temperature: Most NAS devices have built-in temperature monitoring features. Check the device's temperature readings to determine if it is consistently running at high temperatures. If so, it may indicate a larger cooling issue that needs to be addressed.

      Once the hardware issues have been resolved and the NAS device is running within acceptable temperature ranges, data recovery can be attempted. However, if the device has suffered significant damage or if the data is critical, it is recommended to consult a professional data recovery service. They have specialized tools and expertise to recover data from damaged or malfunctioning NAS devices.

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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 xaker.ru, 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.

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Questions and answers

  • How does the Digiever DS-2105 UHD function as a VPN server and what are its key features in this regard?

    The Digiever DS-2105 UHD is primarily a network video recorder (NVR) designed for video surveillance systems. While it does not function as a dedicated VPN server, it supports VPN (Virtual Private Network) connectivity to enhance remote access and security. Here are some key features related to VPN functionality:

    1. Secure Remote Access: The DS-2105 UHD allows users to establish a secure connection to their surveillance system over the internet using VPN. This ensures encrypted communication and protects against unauthorized access.
    2. VPN Protocols: It supports various VPN protocols such as PPTP (Point-to-Point Tunneling Protocol), L2TP (Layer 2 Tunneling Protocol), and OpenVPN. These protocols enable secure tunneling and data transmission between the remote client and the NVR.
    3. Multi-User VPN Support: The DS-2105 UHD allows multiple users to connect to the NVR via VPN simultaneously. This feature is particularly useful for organizations with multiple remote users or branches that need access to the surveillance system.
    4. Dynamic DNS: The device supports Dynamic DNS (DDNS), which allows users to access the NVR using a domain name instead of an IP address. This simplifies the VPN configuration process and makes it easier to connect remotely.
    5. Mobile VPN Client: Digiever provides a mobile app (Digishield) that supports VPN connectivity. Users can securely access the NVR and view live or recorded video footage on their smartphones or tablets.
    6. Two-Factor Authentication: The DS-2105 UHD supports two-factor authentication for VPN connections. This adds an extra layer of security by requiring users to provide a second form of authentication, such as a unique code generated on their mobile device.

    It's important to note that while the Digiever DS-2105 UHD offers VPN functionality, its primary purpose is video surveillance. If you require a dedicated VPN server with advanced features, you may need to consider a separate solution specifically designed for VPN services.

  • What are the advantages of using the Digiever DS-2105 UHD as a VPN server compared to other similar devices in the market?

    The Digiever DS-2105 UHD offers several advantages as a VPN server compared to other similar devices in the market:

    1. High-quality video streaming: The DS-2105 UHD supports Ultra HD video streaming, ensuring a superior visual experience for remote access to surveillance systems. This is particularly beneficial for users who require detailed video monitoring or analysis.
    2. Secure remote access: The device provides a secure VPN connection, allowing users to access their surveillance systems remotely without compromising data security. This is crucial for organizations that prioritize the protection of sensitive video footage and system settings.
    3. Efficient bandwidth utilization: The DS-2105 UHD utilizes H.265 video compression technology, which significantly reduces bandwidth consumption while maintaining video quality. This ensures smooth remote access even with limited network resources, making it ideal for remote surveillance in bandwidth-constrained environments.
    4. Versatile compatibility: The device supports various VPN protocols, including PPTP, L2TP, and OpenVPN. This flexibility enables seamless integration with different client devices and operating systems, accommodating a wide range of user preferences and requirements.
    5. User-friendly interface: The DS-2105 UHD comes with an intuitive and user-friendly management interface, making it easy to set up and configure the VPN server. This simplifies the deployment process, reducing the need for extensive technical expertise.
    6. Scalability: The Digiever DS-2105 UHD is designed to handle multiple concurrent VPN connections, allowing for scalability as the surveillance system expands. This ensures that the device can accommodate growing user demands without compromising performance.

    Overall, the Digiever DS-2105 UHD stands out as a VPN server due to its high-quality video streaming capabilities, secure remote access, efficient bandwidth utilization, compatibility with various protocols, user-friendly interface, and scalability.

  • Can you provide a step-by-step guide on setting up the Digiever DS-2105 UHD as a VPN server and configuring it for remote access?

    Setting up the Digiever DS-2105 UHD as a VPN server and configuring it for remote access involves several steps. Here is a step-by-step guide to help you with the process:

    1. Connect the Digiever DS-2105 UHD to your network: Ensure that the NVR is connected to your network using an Ethernet cable. Make sure it has a valid IP address within your network.
    2. Access the Digiever NVR web interface: Open a web browser on a computer connected to the same network and enter the IP address of the Digiever NVR in the address bar. Press Enter to access the web interface.
    3. Login to the Digiever NVR: Enter the default username and password (admin/admin) to log in to the NVR.
    4. Navigate to the Network Settings: Once logged in, go to the "Configuration" tab and select "Network Settings."
    5. Enable VPN Service: In the Network Settings page, locate the "VPN" section and click on "Enable VPN Service" to activate the VPN server functionality.
    6. Configure VPN Settings: Fill in the required information for the VPN settings, such as the VPN server address, subnet mask, DNS server, and IP range for VPN clients. Make sure to choose a secure VPN protocol, such as OpenVPN or PPTP.
    7. Save the settings: Click on the "Save" button to apply the VPN server settings.
    8. Set up port forwarding: To allow remote access to the VPN server, you need to configure port forwarding on your router. Log in to your router's administration interface and navigate to the port forwarding section. Forward the VPN port (default is 1194 for OpenVPN) to the internal IP address of the Digiever NVR.
    9. Configure firewall settings: If you have a firewall enabled on your network, ensure that it allows incoming connections to the VPN server port. Create a rule to allow traffic on the VPN port (e.g., UDP 1194).
    10. Set up VPN clients: Install a VPN client software (e.g., OpenVPN client) on the remote device you wish to connect to the Digiever NVR remotely. Configure the client with the VPN server address and other necessary details. Connect to the VPN server using the client software.
    11. Test remote access: Once the VPN client is connected to the Digiever NVR VPN server, you should be able to access the NVR's web interface or other services remotely using the NVR's internal IP address.

    Remember to consult the Digiever DS-2105 UHD user manual or contact Digiever support for specific instructions or troubleshooting assistance tailored to your device.

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