How to recover data from Synology DiskStation DS716+II / DS716+ 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 Synology DiskStation DS716+II / DS716+

Synology DiskStation DS716+II / DS716+ NAS Data Recovery in 2024

In this step-by-step tutorial, we’ll show you how to rebuild your RAID and recover data from DiskStation DS716+II / DS716+.

How to recover data from NAS Synology DiskStation DS716+II / DS716+

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 Synology 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 recommended steps to take after detecting or suspecting data loss on a NAS Synology DiskStation DS716+II / DS716+ device?

If you suspect or detect data loss on a Synology DiskStation DS716+II or DS716+ NAS device, here are some recommended steps to take:

  1. Stop using the device: As soon as you notice data loss, it is crucial to stop using the device immediately. Continued use may overwrite the lost data, making recovery more difficult or even impossible.
  2. Identify the cause: Try to determine the cause of the data loss. It could be due to hardware failure, accidental deletion, malware, or other reasons. Understanding the cause can help in formulating a recovery plan.
  3. Check hardware connections: Ensure that all cables and connections between the NAS device and other components are secure. Loose or faulty connections can lead to data loss or corruption.
  4. Restart the device: Sometimes, a simple restart can resolve minor issues. Power off the NAS device, wait for a few seconds, and then power it back on. Check if the lost data reappears after the restart.
  5. Check disk health: Log in to the DiskStation Manager (DSM) web interface and navigate to the Storage Manager. Check the health status of the hard drives in the NAS. If any drive is marked as degraded or failed, it might be the cause of data loss. Replace the faulty drive(s) following the manufacturer's instructions.
  6. Restore from backup: If you have a recent backup of your data, restore it to the NAS device. Synology NAS devices have built-in backup features that allow you to create scheduled backups to external drives, cloud storage, or other NAS devices. Refer to the Synology documentation for instructions on how to restore data from backups.
  7. Use data recovery software: If you don't have a backup or the backup is outdated, you can try using data recovery software specifically designed for NAS devices. Synology offers its own software called "Synology Data Recovery" that can help recover lost data from Synology NAS devices. Follow the instructions provided by Synology for using the software.
  8. Contact Synology support: If you are unable to recover the lost data using the above methods, it is recommended to contact Synology support for further assistance. They have expertise in dealing with data loss situations and may be able to provide additional guidance or solutions.

Remember, prevention is always better than cure. Regularly backing up your data and implementing RAID configurations can help minimize the risk of data loss on NAS devices.

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

Although NAS DiskStation DS716+II / DS716+ 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 Synology DiskStation DS716+II / DS716+. 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 Synology

How to recover data from a Synology

DiskStation DS716+II / DS716+ has 2 HDD slots, and it supports the following array types:

  • Synology Hybrid RAID(SHR);
  • RAID 1;
  • RAID 0;
  • Basic;
  • JBOD;

NAS supports:

  • Btrfs;
  • EXT4;
  • EXT3 (External Disk Only);
  • FAT32 (External Disk Only);
  • NTFS (External Disk Only);
  • HFS+ (External Disk Only);

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 Synology DiskStation DS716+II / DS716+ network-attached storage keeps DSM (DiskStation Manager) 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 (1)

  • 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 DiskStation DS716+II / DS716+, feel free to leave a comment!
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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, 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 are the supported video streaming protocols and formats for Synology DiskStation DS716+II / DS716+?

    The Synology DiskStation DS716+II / DS716+ supports various video streaming protocols and formats. Here are some of the commonly supported ones:

    1. Video Streaming Protocols:
    • HTTP
    • RTMP (Real-Time Messaging Protocol)
    • RTSP (Real-Time Streaming Protocol)
    • HLS (HTTP Live Streaming)
    • MPEG-DASH (Dynamic Adaptive Streaming over HTTP)
    1. Video Formats:
    • H.264 (AVC)
    • H.265 (HEVC)
    • MPEG-2
    • VC-1
    • WMV9
    • DivX
    • Xvid
    • AVI
    • MKV
    • MP4
    • MOV
    • FLV
    • WebM
    • 3GP

    Note that the specific supported protocols and formats may depend on the software version installed on your Synology DiskStation. It is recommended to check the official documentation or the product specifications for the most up-to-date information.

  • Can the Synology DiskStation DS716+II / DS716+ handle multiple concurrent video streams without performance degradation?

    Yes, the Synology DiskStation DS716+II / DS716+ is designed to handle multiple concurrent video streams without performance degradation. It is equipped with a powerful Intel processor and has sufficient RAM to handle multiple tasks simultaneously. Additionally, it supports hardware transcoding, which offloads the video transcoding process from the CPU, further enhancing its ability to handle multiple video streams efficiently.

  • Are there any specific requirements or recommendations for optimizing video streaming performance on the Synology DiskStation DS716+II / DS716+?

    Yes, there are several requirements and recommendations to optimize video streaming performance on the Synology DiskStation DS716+II / DS716+:

    1. Network Speed: Ensure that you have a high-speed network connection. Gigabit Ethernet (1000 Mbps) is recommended for optimal performance.
    2. Transcoding: If you plan to transcode videos on-the-fly, it is recommended to have a powerful CPU. The DS716+II / DS716+ is equipped with an Intel Celeron N3160 quad-core processor, which should handle most transcoding tasks efficiently.
    3. File Formats: Use video file formats that are supported by the Synology DiskStation. Commonly supported formats include MP4, MKV, AVI, and MOV. Using unsupported formats may result in transcoding, which can impact performance.
    4. Video Resolution: Streaming high-resolution videos can require more processing power and network bandwidth. If possible, consider lowering the resolution of your videos to reduce the load on the DiskStation and network.
    5. Network Configuration: Ensure that your network is properly configured for video streaming. Use wired connections instead of Wi-Fi whenever possible, as Wi-Fi can introduce latency and bandwidth limitations.
    6. Enable Hardware Acceleration: The DS716+II / DS716+ supports hardware acceleration for certain video codecs. Enabling this feature can significantly improve transcoding performance. You can find this option in the Synology DiskStation's settings.
    7. Update Firmware and Software: Keep your DiskStation's firmware and software up to date. Synology regularly releases updates that include performance improvements and bug fixes.
    8. Use a Media Server App: Install and configure a media server app on your DiskStation, such as Plex or Video Station. These apps are designed for efficient video streaming and provide additional features like metadata management and remote access.

    By following these requirements and recommendations, you can optimize video streaming performance on the Synology DiskStation DS716+II / DS716+.

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