How to recover data from Synology DiskStation DS3615xs 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 DS3615xs

Synology DiskStation DS3615xs 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 DS3615xs.

How to recover data from NAS Synology DiskStation DS3615xs

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.

Can data be lost during the process of upgrading or updating the NAS Synology DiskStation DS3615xs device's firmware?

Yes, there is a possibility of data loss during the process of upgrading or updating the firmware of a NAS Synology DiskStation DS3615xs device. Although rare, there can be unforeseen issues such as power interruptions, hardware failures, or software glitches that may cause data loss. It is always recommended to have a backup of important data before performing any firmware updates or upgrades to ensure the safety of your data.

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

Although NAS DiskStation DS3615xs 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 DS3615xs. 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.

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How to recover data from a Synology

How to recover data from a Synology

DiskStation DS3615xs has 12 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 DS3615xs 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

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  • 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 DS3615xs, 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 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

  • What is DLNA and how does it work in the context of media streaming and sharing?

    DLNA, which stands for Digital Living Network Alliance, is a standard protocol that enables devices to share and stream media content over a local network. It allows different devices, such as smartphones, tablets, computers, smart TVs, and game consoles, to communicate and share media files seamlessly.

    DLNA works by establishing a network connection between devices using the same local network. The devices must be DLNA-certified, meaning they meet the interoperability guidelines set by the DLNA organization.

    To stream and share media content, the DLNA-enabled device acts as a server, while the receiving device acts as a client. The server device makes its media files, such as photos, videos, and music, available on the network. The client device can then discover and access these media files for streaming or playback.

    DLNA uses Universal Plug and Play (UPnP) technology to automatically detect and connect devices on the network. Once connected, the client device can browse the available media files on the server device and initiate streaming or transfer requests. DLNA supports various media formats and codecs, ensuring compatibility between different devices.

    Furthermore, DLNA allows for additional functionalities like remote control and media playback control. For example, a DLNA-enabled smartphone can act as a remote control to browse and play media files on a smart TV or speakers.

    Overall, DLNA simplifies the process of sharing and streaming media content across different devices on a local network, providing a convenient and seamless multimedia experience.

  • How does a NAS Synology DiskStation DS3615xs utilize the DLNA protocol to facilitate media management and streaming?

    The Synology DiskStation DS3615xs is a Network Attached Storage (NAS) device that utilizes the DLNA (Digital Living Network Alliance) protocol to facilitate media management and streaming. Here's how it works:

    1. Media Server: The DS3615xs acts as a media server, which means it stores and organizes media files such as photos, videos, and music. It supports various file formats and can handle large libraries of media content.
    2. DLNA Certification: The DS3615xs is DLNA-certified, which ensures compatibility with other DLNA-certified devices like smart TVs, media players, game consoles, and mobile devices. This certification guarantees seamless communication and streaming between devices.
    3. Media Indexing: The DS3615xs automatically indexes the media files stored on its hard drives. It creates a media library that includes metadata such as titles, genres, album covers, and more. This indexing process helps in categorizing and organizing the media content for easy access.
    4. Media Streaming: Once the media files are indexed, DLNA-compatible devices connected to the same network can discover and access the DS3615xs as a media source. Users can browse the media library and stream content directly to their devices without needing to transfer or copy files locally.
    5. Transcoding: The DS3615xs supports on-the-fly transcoding, which means it can convert media files into different formats and resolutions to ensure compatibility with the target device. For example, if a video file is in a format not supported by the device, the DS3615xs can transcode it into a compatible format in real-time.
    6. Remote Access: DLNA also allows remote access to media content. Users can access their DS3615xs media library from outside their home network by setting up port forwarding or using Synology's QuickConnect service. This enables streaming media on the go, even when not connected to the local network.

    Overall, the DS3615xs leverages the DLNA protocol to provide a seamless media management and streaming experience. It acts as a central media server, allowing users to access and stream their media content on various DLNA-certified devices within their home network or remotely.

  • What are the key features and benefits of using DLNA with a Synology DiskStation DS3615xs, and how does it enhance the overall media experience?

    The key features and benefits of using DLNA with a Synology DiskStation DS3615xs are as follows:

    1. Media Streaming: DLNA allows you to stream media content such as videos, photos, and music from your DiskStation to DLNA-enabled devices like smart TVs, gaming consoles, and media players. It provides a seamless and convenient way to access your media files on different devices within your home network.
    2. Easy Setup: The DiskStation DS3615xs has built-in DLNA server functionality, which means you don't need to install any additional software or configure complex settings. It is ready to use out of the box, making the setup process quick and hassle-free.
    3. Multi-room Streaming: DLNA enables multi-room streaming, allowing you to play media simultaneously on multiple DLNA-certified devices. You can enjoy the same movie or music in different rooms, creating a synchronized entertainment experience throughout your home.
    4. Cross-platform Compatibility: DLNA is a widely supported standard, ensuring compatibility with various devices and operating systems. Whether you have a Windows PC, Mac, Android smartphone, or iOS device, you can easily access and stream media from your DiskStation using DLNA.
    5. Remote Access: With DLNA and the Synology DiskStation, you can access your media files remotely over the internet. This means you can stream your favorite movies or music from your DiskStation to your DLNA-enabled device even when you are away from home. It enhances the flexibility and convenience of accessing your media library from anywhere.

    Overall, using DLNA with a Synology DiskStation DS3615xs enhances the media experience by providing a centralized and efficient way to manage, stream, and access your media files. It simplifies the process of sharing and enjoying your multimedia content across multiple devices, making it easier to enjoy your favorite movies, music, and photos throughout your home network.

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