How to Extract Data from a RAID Disk When NAS Netgear ReadyNAS RN516 is Not Booting

Has your NAS Netgear ReadyNAS RN516 suddenly lost its network drive and you’re unsure what to do next? Did the RAID array collapse, making your files inaccessible? Is the device throwing errors during startup? Perhaps you accidentally rebuilt the RAID array or several hard drives failed at the same time?

How to Extract Data from a RAID Disk When NAS Netgear ReadyNAS RN516 is Not Booting
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Netgear ReadyNAS RN516 NAS Data Recovery in 2025

In this step-by-step tutorial, we’ll show you how to rebuild your RAID and recover data from an ReadyNAS RN516. We’ll walk through the most common causes of failure and demonstrate proven methods to restore files from a lost or degraded RAID array.

How to Extract Data from a RAID Disk When NAS Netgear ReadyNAS RN516 is Not Booting

RAID Recovery™ 2.8
Recover data from damaged RAID arrays inaccessible from a computer.
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Why Regular Data Recovery Tools Can’t Restore Files from RAID

Conventional hard drives store user data by writing it sequentially across the disk surface, which means an entire file is typically located on a single drive. In contrast, when data is written to a RAID array, each file is split into multiple fragments. These fragments are then distributed and written in sequence across all the drives in the array. Depending on the configuration, fragment sizes can range from 2 KB to 2 MB, so every file is physically stored across several disks at once.

This approach significantly increases read and write performance — after all, writing two halves of a 1 GB file to two drives simultaneously is much faster than writing the full 1 GB to a single disk. However, this same mechanism makes file recovery far more complex.

Different RAID levels use different methods to distribute and protect data. On top of that, manufacturers like Netgear often add their own proprietary structures and variations. As a result, data can be written to disks in many different formats, and each requires a specific approach during recovery.

Can the use of specific data synchronization or replication mechanisms mitigate data loss risks for NAS Netgear ReadyNAS RN516 devices?

Yes, the use of specific data synchronization or replication mechanisms can mitigate data loss risks for NAS Netgear ReadyNAS RN516 devices. These mechanisms ensure that data is regularly and automatically backed up or replicated to another location or device, reducing the chances of data loss in the event of hardware failure, accidental deletion, or other unforeseen incidents.

Netgear ReadyNAS RN516 devices support various data synchronization and replication features, such as:

  1. RAID (Redundant Array of Independent Disks): RAID configurations can be set up on the ReadyNAS device to provide redundancy and data protection. Different RAID levels, such as RAID 1 (mirroring) or RAID 5 (striping with parity), can be used to protect against drive failures and ensure data availability.
  2. Snapshot Replication: ReadyNAS devices offer snapshot technology, which allows you to take point-in-time copies of your data. These snapshots can be replicated to another ReadyNAS device or an offsite location, providing additional data protection and the ability to recover previous versions of files.
  3. Remote Replication: ReadyNAS devices support remote replication, where data can be automatically replicated to another ReadyNAS device located in a different physical location. This ensures that data is protected in case of a disaster at the primary location.
  4. Cloud Backup: ReadyNAS devices can be integrated with various cloud backup services, allowing you to back up your data to the cloud. This provides an additional layer of protection by storing your data offsite and protecting against local hardware failures or disasters.

By utilizing these data synchronization and replication mechanisms, you can significantly reduce the risk of data loss on Netgear ReadyNAS RN516 devices. It is important to configure and monitor these mechanisms properly to ensure that backups are up to date and data can be easily restored when needed.

How to Remove Hard Disks from Your NAS and Connect Them to a PC

Although the NAS ReadyNAS RN516 can be accessed over the network, you still need to remove its hard disks and connect them directly to a Windows PC. Only then can the recovery software properly scan and analyze the drives. Follow these steps:

  1. Power off the NAS and disconnect it from the power source.

    WARNING! Before removing any drives, carefully read the device manual. Improper actions may damage both the NAS enclosure and the hard disks in the RAID array.

  2. Remove the hard disks one by one, gently sliding each drive out of its slot. Remember that hard disks are highly sensitive: any impact or drop can cause serious physical damage.

  3. Label each hard disk according to its position inside the NAS. The order of the drives is crucial for correct RAID reconstruction.

  4. Connect the drives to your computer. In this video, we explain which ports you can use to connect hard disks and what to do if your PC does not have enough free connectors.

    Go to view
    How to Order Remote Data Recovery

    How to Order Remote Data Recovery

Step-by-Step Data Recovery with Hetman RAID Recovery

Hetman Raid Recovery

This program restores data from damaged RAID arrays and is fully compatible with Netgear ReadyNAS RN516. Each hard disk in the array contains technical metadata describing how files were written. When launched, Hetman RAID Recovery analyzes this metadata, automatically reconstructs the damaged array, and provides access to its contents. After that, you can browse the recovered disk and save your files. The program can also restore files that were accidentally deleted from the network drive.

Go to view
How to recover data from a Netgear

How to recover data from a Netgear

ReadyNAS RN516 has 6 HDD slots, and it supports the following array types:

  • RAID 0;
  • X-RAID;
  • RAID 1;
  • RAID 5;
  • RAID 6;
  • JBOD;

NAS supports:

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

How to Safely Recover Data from Disk Images

This utility allows you to create a complete copy of a disk and work with the disk image instead of the physical drive. This approach helps protect your data from:

  • Overwriting during the recovery process;
  • Additional data loss caused by bad sectors;
  • User errors.

To create a disk image, follow these steps:

  1. Ensure you have enough free space to store the image. Its size will typically match the size of the original disk.

  2. In the main window, select the target disk and choose Tools - Save Disk. You can also select multiple disks if needed.

  3. When the Image Creation Wizard opens, select whether you want to save the entire disk or only a specific region. Adjust the settings and click Next.

    Hetman RAID Recovery: Image Creation Wizard

  4. Choose the directory where the image will be saved. You may select any available disk connected to your PC or upload the image via FTP.

    Hetman RAID Recovery: Choose a disk or save the image via FTP

Where Are the User’s Files Actually Stored?

The Netgear ReadyNAS RN516 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.

RAID Recovery Software: Detailed Comparison

Product Operating system RAID controller support Supported file systems Virtual RAID controller support Data recovery from damaged RAID File preview
Hetman RAID Recovery Windows, Linux, MacOS Yes, over 100 controllers FAT, exFAT, NTFS, ReFS, APFS, HFS+, Ext4, Ext3, Ext2, ReiserFS, Btrfs, VMFS, Hikvision, XFS, UFS, ZFS Yes Yes Yes
DiskInternals RAID Recovery Windows Yes, over 10 controllers FAT, NTFS, Ext2/3/4, HFS+ No Yes Yes
R-Studio Windows, Mac, Linux Yes, over 20 controllers FAT, NTFS, Ext2/3/4, HFS+ Yes Yes Yes
UFS Explorer RAID Recovery Windows, Mac, Linux Yes, over 100 controllers FAT, NTFS, Ext2/3/4, HFS+ Yes Yes Yes
EaseUS Data Recovery Windows Yes, over 20 controllers FAT, NTFS, Ext2/3/4, HFS+ No Yes Yes
ReclaiMe Free RAID Recovery Windows 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 ReadyNAS RN516, feel free to leave a comment!
    Reply
  • Ricky Cotes
    Ricky Cotes 11.09.2023 05:54 #
    Are there any limitations on the size of data that can be recovered from a NAS Netgear ReadyNAS RN516 device?
    Reply
    • Hetman Software
      Hetman Software 11.09.2023 06:59 #

      Yes, there are limitations on the size of data that can be recovered from a NAS Netgear ReadyNAS RN516 device. The maximum size of data that can be recovered depends on several factors such as the available storage capacity of the device, the file system used, and the configuration settings.

      The Netgear ReadyNAS RN516 device supports various RAID configurations, including RAID 0, RAID 1, RAID 5, RAID 6, and RAID 10. The maximum storage capacity and data recovery capabilities will vary based on the RAID configuration chosen.

      Additionally, the file system used on the ReadyNAS device can also impact the maximum recoverable data size. The ReadyNAS supports multiple file systems, including Btrfs, EXT4, and XFS. Each file system may have different limitations and recovery capabilities.

      It is recommended to consult the Netgear ReadyNAS RN516 documentation or contact Netgear support for specific details on the maximum recoverable data size based on the device's configuration and settings.

      Reply
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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 Netgear ReadyNAS RN516 function as a VPN server, and what are its key features and capabilities in this regard?

    The Netgear ReadyNAS RN516 can function as a VPN (Virtual Private Network) server, allowing remote users to securely access the local network resources over the internet. Here are its key features and capabilities in this regard:

    1. VPN Protocols: The ReadyNAS RN516 supports various VPN protocols such as OpenVPN, PPTP (Point-to-Point Tunneling Protocol), and L2TP (Layer 2 Tunneling Protocol). These protocols ensure secure and encrypted communication between the remote user and the local network.
    2. Secure Remote Access: With the VPN server functionality, the ReadyNAS RN516 provides a secure way for remote users to access files, folders, and other resources on the local network. This is particularly useful for remote employees or users who need to access sensitive data securely.
    3. Easy Setup: The ReadyNAS RN516 offers a user-friendly web interface that simplifies the setup and configuration of the VPN server. It provides step-by-step instructions and wizards to guide users through the process.
    4. Multiple Concurrent Connections: The RN516 supports multiple concurrent VPN connections, allowing multiple remote users to connect to the local network simultaneously. This is beneficial for businesses with multiple remote employees or branch offices.
    5. Customizable Security Settings: The ReadyNAS RN516 allows users to customize security settings for the VPN server. Users can configure encryption methods, authentication protocols, and access controls to ensure the highest level of security for remote connections.
    6. Mobile Device Support: The ReadyNAS RN516 is compatible with mobile devices such as smartphones and tablets. It supports VPN client apps available for iOS and Android, enabling secure access to the local network resources from anywhere.
    7. Traffic Routing and Split Tunneling: The RN516 offers advanced features like traffic routing and split tunneling. Traffic routing allows users to specify which network traffic should pass through the VPN server, while split tunneling enables users to access both local and internet resources simultaneously.

    Overall, the Netgear ReadyNAS RN516 provides a robust VPN server functionality with secure remote access, easy setup, customizable security settings, and support for multiple concurrent connections.

  • What are the steps involved in setting up the Netgear ReadyNAS RN516 as a VPN server, and what are the recommended configurations and settings for optimal performance?

    Setting up the Netgear ReadyNAS RN516 as a VPN server involves several steps. Here is a general outline of the process:

    1. Connect the ReadyNAS to your network: Connect the ReadyNAS to your router using an Ethernet cable and ensure it has internet connectivity.
    2. Access the ReadyNAS admin interface: Open a web browser and enter the IP address of the ReadyNAS to access the admin interface.
    3. Configure network settings: In the admin interface, navigate to the "Network" section and configure the IP address settings for the ReadyNAS. Ensure it has a static IP address for reliable VPN access.
    4. Enable VPN service: In the admin interface, go to the "Services" section and enable the VPN service. Choose the appropriate VPN protocol, such as OpenVPN or PPTP, based on your requirements.
    5. Configure VPN settings: Set up the VPN settings, including authentication method (username/password or certificate), encryption, and other parameters. The exact steps may vary depending on the VPN protocol chosen.
    6. Create VPN user accounts: In the admin interface, navigate to the "Users" section and create user accounts for VPN access. Assign appropriate privileges and ensure strong passwords are used.
    7. Configure port forwarding: If your router uses NAT (Network Address Translation), you need to configure port forwarding to allow VPN traffic to reach the ReadyNAS. Consult your router's documentation for instructions on how to set up port forwarding.
    8. Test the VPN connection: Use a VPN client on a remote device to connect to the ReadyNAS VPN server. Ensure the connection is successful and verify that you can access the resources on the ReadyNAS remotely.

    For optimal performance, consider the following recommended configurations and settings:

    1. Use a wired Ethernet connection: Connect the ReadyNAS to the router using a wired Ethernet connection instead of relying on Wi-Fi for faster and more stable network connectivity.
    2. Choose a secure VPN protocol: Select a VPN protocol that offers strong encryption and secure authentication, such as OpenVPN. Avoid using outdated or insecure protocols like PPTP.
    3. Enable hardware acceleration (if available): If your ReadyNAS model supports hardware acceleration for VPN, enable this feature in the admin interface. It can significantly improve VPN performance.
    4. Use strong encryption: Choose a strong encryption algorithm, such as AES-256, for secure VPN communication. However, keep in mind that stronger encryption may impact performance, especially on lower-end models.
    5. Optimize MTU settings: Adjust the Maximum Transmission Unit (MTU) settings on the ReadyNAS and VPN client devices to avoid fragmentation and improve performance. Experiment with different values to find the optimal setting.
    6. Regularly update firmware: Keep the ReadyNAS firmware up to date to ensure you have the latest security patches and performance improvements.

    Note: The specific steps and settings may vary depending on the firmware version and model of your Netgear ReadyNAS RN516. It is recommended to consult the official documentation or Netgear support for detailed instructions tailored to your specific device.

  • What are the advantages and potential use cases of using the Netgear ReadyNAS RN516 as a VPN server, and how does it compare to other similar solutions in terms of security, performance, and ease of use?

    The Netgear ReadyNAS RN516 offers several advantages and potential use cases as a VPN server:

    1. Data Security: The ReadyNAS RN516 provides a secure platform for hosting a VPN server, ensuring that data transmitted between the server and clients is encrypted and protected from unauthorized access.
    2. Remote Access: With the VPN server functionality, you can securely connect to your local network from remote locations. This is particularly useful for employees or individuals who need to access files, applications, or resources on the network while away from the office or home.
    3. Site-to-Site Connectivity: The ReadyNAS RN516 can also be used to establish secure connections between multiple locations, creating a virtual private network (VPN) between different offices or branches. This enables secure communication and resource sharing between sites.
    4. Client Compatibility: The ReadyNAS RN516 supports a wide range of VPN client software, making it compatible with various operating systems and devices such as Windows, macOS, Linux, iOS, and Android. This ensures that users can connect to the VPN server regardless of their preferred platform.
    5. Scalability: The RN516 is designed to handle multiple concurrent VPN connections, making it suitable for small to medium-sized businesses or organizations that require VPN access for multiple users simultaneously.

    In terms of security, the ReadyNAS RN516 offers robust encryption protocols (such as IPSec and SSL/TLS) to secure VPN connections. It also supports features like firewall rules and access controls, further enhancing security.

    Regarding performance, the RN516 is equipped with a powerful processor and ample memory, allowing it to handle VPN traffic efficiently. However, the actual performance may depend on factors such as the number of concurrent connections and the network infrastructure.

    In terms of ease of use, the ReadyNAS RN516 provides a user-friendly web-based interface for configuring and managing the VPN server. Netgear also offers comprehensive documentation and support resources, making it easier for users to set up and maintain the VPN server.

    When comparing the ReadyNAS RN516 to other similar solutions, it is important to consider factors such as the specific requirements, budget, and the level of technical expertise available. There are various VPN server software and hardware options available in the market, each with its own strengths and weaknesses. It is recommended to evaluate multiple solutions, considering factors like security features, performance capabilities, ease of use, and compatibility with existing network infrastructure before making a decision.
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