How to recover data from Synology DiskStation DS1815+ 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 DS1815+

Synology DiskStation DS1815+ 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 DS1815+.

How to recover data from NAS Synology DiskStation DS1815+

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 specific network security measures to implement for safeguarding NAS Synology DiskStation DS1815+ devices against data loss?

Yes, there are several network security measures that can be implemented to safeguard NAS Synology DiskStation DS1815+ devices against data loss. Here are some important measures:

  1. Enable Firewall: Enable the built-in firewall on the DiskStation to block unauthorized access attempts from the network.
  2. Update Firmware: Keep the firmware of the DiskStation up to date to ensure that any known security vulnerabilities are patched.
  3. Strong Passwords: Set strong passwords for all user accounts, including the administrator account. Avoid using common or easily guessable passwords.
  4. Two-Factor Authentication (2FA): Enable 2FA for all user accounts to add an extra layer of security. This will require users to provide a second form of authentication, such as a code from a mobile app, in addition to their password.
  5. Disable Default Services: Disable any unnecessary services or applications that are not being used. This reduces the attack surface and minimizes the risk of potential vulnerabilities.
  6. Network Segmentation: If possible, segregate the NAS device on a separate network segment or VLAN to limit its exposure to potential threats from other devices on the network.
  7. Enable Network Encryption: Use protocols like SSL/TLS or VPN to encrypt the network traffic between the NAS device and other devices accessing it.
  8. Regular Data Backups: Implement a regular backup strategy to ensure that critical data is backed up frequently. This will help mitigate the impact of data loss in case of a security breach.
  9. Antivirus and Malware Protection: Install and regularly update antivirus and anti-malware software on the NAS device to detect and prevent any malicious software from compromising the system.
  10. Access Control: Implement granular access control policies to restrict access to specific folders or files based on user roles and permissions. This helps prevent unauthorized access or accidental deletion of data.
  11. Intrusion Detection and Prevention: Enable intrusion detection and prevention systems (IDS/IPS) to monitor network traffic and detect any suspicious activities or attempts to exploit vulnerabilities.
  12. Regular Security Audits: Conduct regular security audits to identify any potential weaknesses in the network and system configuration. This can help in identifying and addressing security gaps before they are exploited.

It is important to note that these measures should be implemented in conjunction with other best practices for data security and protection.

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

Although NAS DiskStation DS1815+ 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 DS1815+. 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 DS1815+ has 8 HDD slots, and it supports the following array types:

  • Synology Hybrid RAID (SHR);
  • RAID 6;
  • RAID 5;
  • RAID 10;
  • RAID 1;
  • RAID 0;
  • Basic;
  • JBOD;

NAS supports:

  • Btrfs;
  • EXT4;
  • EXT3 (External Disk Only);
  • FAT32 (External Disk Only);
  • exFAT (External Disk Only);
  • NTFS (External Disk Only);
  • HFS+ (External Disk Read 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 DS1815+ 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 DS1815+, 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 key features and capabilities of the NAS Synology DiskStation DS1815+ that make it suitable for use in a surveillance system?

    The Synology DiskStation DS1815+ offers several key features and capabilities that make it suitable for use in a surveillance system:

    1. High storage capacity: The DS1815+ supports up to 8 hard drives, allowing for a large amount of storage space for surveillance footage. This is crucial for systems that require long-term storage of video recordings.
    2. Scalability: In addition to the 8 drive bays, the DS1815+ can be expanded further by connecting additional expansion units, providing even more storage capacity as the surveillance system grows.
    3. Performance: The DS1815+ is equipped with a powerful quad-core processor and ample memory, ensuring smooth and efficient operation. This is important for handling multiple IP cameras and processing high-definition video streams.
    4. Surveillance Station: Synology's Surveillance Station software is included with the DS1815+, offering a comprehensive surveillance management solution. It provides features like live view, recording, playback, and alert notifications. It supports a wide range of IP cameras, allowing for flexibility in choosing compatible devices.
    5. Mobile access: With the DS1815+ and Surveillance Station, users can access their surveillance system remotely using mobile devices. This allows for real-time monitoring and playback of video footage from anywhere, enhancing the system's accessibility and convenience.
    6. Advanced security features: The DS1815+ offers various security measures to protect the surveillance system and its data. These include built-in firewall, encryption options, and support for secure connections using SSL/TLS protocols.
    7. Integration with other systems: The DS1815+ supports integration with other security systems and devices, such as alarm systems and access control systems. This allows for a more comprehensive and unified security solution.

    Overall, the DS1815+ provides a robust and scalable storage platform, combined with powerful surveillance management software, making it well-suited for use in surveillance systems of various sizes and requirements.

  • How does the DS1815+ handle video storage and management for surveillance applications, and what are the recommended settings for optimal performance?

    The DS1815+ is a network-attached storage (NAS) device designed to handle video storage and management for surveillance applications. It offers several features and settings to ensure optimal performance. Here's how it handles video storage and some recommended settings:

    1. Surveillance Station: The DS1815+ comes with Synology's Surveillance Station software, which allows you to manage and monitor IP cameras. It supports a wide range of camera brands and models, making it versatile for surveillance setups.
    2. Storage Capacity: The DS1815+ provides up to eight drive bays, allowing you to install multiple hard drives for increased storage capacity. It supports various RAID configurations (RAID 0, 1, 5, 6, and 10) to ensure data redundancy and performance.
    3. Performance: To achieve optimal performance for video storage and management, consider the following settings:

    a. Hard Drive Configuration: Configure your hard drives in RAID 5 or RAID 6 for a balance between storage capacity and data redundancy. RAID 5 requires at least three drives, while RAID 6 requires at least four drives.

    b. Network Connectivity: Connect the DS1815+ to your network using a Gigabit Ethernet connection to ensure sufficient bandwidth for video streaming and data transfer.

    c. Surveillance Station Settings: Adjust the settings within Surveillance Station to optimize performance. Some recommended settings include reducing the number of live-view channels displayed simultaneously, enabling hardware acceleration if supported by your cameras, and adjusting the recording schedule to avoid unnecessary continuous recording.

    d. Transcoding: The DS1815+ supports hardware transcoding, which can convert video formats on-the-fly for compatibility with different devices. Enable hardware transcoding if you need to stream surveillance footage to devices with varying video playback capabilities.

    e. Surveillance Station Optimization: Synology periodically releases updates and optimizations for Surveillance Station. Ensure you have the latest software version installed to benefit from performance improvements and bug fixes.

    1. Expansion Options: If you require additional storage capacity beyond the eight drive bays of the DS1815+, you can expand it using Synology expansion units such as the DX517. This allows for seamless scalability as your surveillance storage needs grow.

    Overall, the DS1815+ offers robust video storage and management capabilities for surveillance applications. By following the recommended settings and utilizing its features, you can achieve optimal performance and efficiently store and manage your surveillance footage.

  • Can the DS1815+ support multiple IP cameras simultaneously, and what are the considerations for choosing the right cameras and configuring them with the NAS for an effective surveillance setup?

    Yes, the DS1815+ can support multiple IP cameras simultaneously. It has a Surveillance Station application that allows you to manage and monitor IP cameras on the NAS.

    When choosing cameras for an effective surveillance setup with the NAS, here are some considerations:

    1. Compatibility: Ensure that the IP cameras you choose are compatible with the Surveillance Station application on the DS1815+. Check the manufacturer's compatibility list or consult the Synology website for supported camera models.
    2. Resolution and Image Quality: Consider the resolution and image quality required for your surveillance needs. Higher resolution cameras provide clearer images but may require more storage space.
    3. Frame Rate: Determine the required frame rate for your surveillance setup. Higher frame rates allow for smoother video playback but may require more processing power and network bandwidth.
    4. Storage Capacity: Calculate the required storage capacity based on the number of cameras, resolution, frame rate, and retention period. The DS1815+ supports multiple hard drives, allowing you to configure sufficient storage space for your surveillance footage.
    5. Network Bandwidth: Consider the network bandwidth required for transmitting video streams from multiple cameras to the NAS. Ensure that your network infrastructure can handle the data transfer without bottlenecks.
    6. Power over Ethernet (PoE): If you prefer a simplified setup, consider PoE cameras that can receive power and transmit data through a single Ethernet cable. This eliminates the need for separate power cables and adapters.
    7. PTZ and Other Advanced Features: Determine if you require cameras with pan-tilt-zoom (PTZ) functionality or other advanced features like motion detection, night vision, or audio capabilities. Ensure that the cameras you choose support these features and are compatible with the Surveillance Station application.

    Once you have chosen the cameras, configuring them with the NAS involves connecting them to the network and adding them to the Surveillance Station application. The application provides a user-friendly interface to manage and configure camera settings, recording schedules, motion detection, and remote access to the surveillance system. Follow the manufacturer's instructions for camera setup and refer to the Surveillance Station user guide for detailed configuration steps.

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