Restoring NAS Idis DR-3516P RAID Arrays with Multiple Damaged Drives

Has your NAS Idis DR-3516P 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?

Restoring NAS Idis DR-3516P RAID Arrays with Multiple Damaged Drives
Data Recovery Tool

Idis DR-3516P 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 DR-3516P. We’ll walk through the most common causes of failure and demonstrate proven methods to restore files from a lost or degraded RAID array.

Restoring NAS Idis DR-3516P RAID Arrays with Multiple Damaged Drives

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 Idis 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 device firmware rollback or downgrading impact data loss risks for NAS Idis DR-3516P devices?

Rolling back or downgrading the device firmware of a NAS (Network Attached Storage) device like the Idis DR-3516P can potentially introduce data loss risks. Here's why:

  1. Compatibility Issues: Firmware updates often include bug fixes, security patches, and improvements in functionality. Rolling back or downgrading the firmware may lead to compatibility issues with newer software or hardware components, potentially causing data corruption or loss.
  2. Security Vulnerabilities: Older firmware versions might have known security vulnerabilities that have been addressed in subsequent updates. By downgrading the firmware, you expose your NAS device to potential security risks, including unauthorized access, data breaches, or malware attacks.
  3. Data Incompatibility: Firmware updates sometimes modify the file system or data structures used by the NAS device. Reverting to an older firmware version may render the data incompatible, leading to data loss or the inability to access stored files.
  4. Lack of Support: Manufacturers typically focus their support efforts on the latest firmware versions. By downgrading, you may lose access to technical support, bug fixes, and feature enhancements provided by the manufacturer.

To minimize the risk of data loss, it is generally recommended to keep your NAS device's firmware up to date. However, if you need to rollback or downgrade the firmware, it is crucial to perform thorough backups of your data before proceeding. Additionally, consult the manufacturer's documentation or seek assistance from their support team to ensure a smooth transition and avoid potential data loss.

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

Although the NAS DR-3516P 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 Idis DR-3516P. 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 Idis

How to recover data from a Idis

DR-3516P has 3 HDD slots, and it supports the following array types:

  • RAID 0;
  • RAID 1;
  • RAID 5;
  • JBOD;

NAS supports:

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

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 Idis DR-3516P 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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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 DR-3516P, feel free to leave a comment!
    Reply
  • Monty Weatherwax
    Monty Weatherwax 27.08.2023 04:50 #
    How can data recovery from a NAS Idis DR-3516P device be prevented in the future?
    Reply
    • Hetman Software
      Hetman Software 27.08.2023 05:00 #

      To prevent data recovery from a NAS Idis DR-3516P device in the future, you can take the following measures:

      1. Regularly backup your data: Implement a robust backup strategy that includes scheduled backups of your important data. This ensures that even if the NAS device fails or data gets corrupted, you have a copy of your data stored elsewhere.
      2. Use RAID configuration: Configure your NAS device with a RAID (Redundant Array of Independent Disks) setup. RAID provides data redundancy by distributing data across multiple disks, which helps protect against data loss in case of disk failure.
      3. Implement secure access controls: Set up strong passwords and access controls for your NAS device. Only grant access to authorized users and regularly review and update the user permissions to ensure that only necessary individuals have access to the data.
      4. Keep your NAS firmware updated: Regularly check for firmware updates provided by the manufacturer and apply them promptly. Firmware updates often include security patches and bug fixes that can help protect your device from vulnerabilities.
      5. Use encryption: Enable encryption on your NAS device to ensure that even if the physical device is stolen, the data remains inaccessible without the encryption key. This adds an extra layer of protection to your stored data.
      6. Physically secure the NAS device: Place the NAS device in a secure location that is not easily accessible to unauthorized individuals. Consider using locked cabinets or server rooms with restricted access to prevent physical tampering or theft.
      7. Implement network security measures: Protect your network by using firewalls, intrusion detection systems, and secure network protocols. Regularly update and patch your network devices to minimize the risk of unauthorized access.
      8. Train employees on data security best practices: Educate your employees about the importance of data security, including safe file sharing practices, avoiding suspicious links or downloads, and regularly updating their passwords.

      By implementing these measures, you can significantly reduce the risk of data loss or unauthorized access to your NAS device in the future.

      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

  • What are the key features and capabilities of the NAS Idis DR-3516P for data backup purposes?

    The NAS Idis DR-3516P is a network-attached storage device designed for data backup purposes. Some of its key features and capabilities include:

    1. High Storage Capacity: The DR-3516P offers a large storage capacity, allowing you to store and backup a significant amount of data.
    2. RAID Support: The NAS supports various RAID configurations, such as RAID 0, 1, 5, 6, and 10, providing data redundancy and protection against drive failures.
    3. Data Deduplication: The device utilizes data deduplication technology to eliminate redundant data, reducing storage requirements and optimizing backup efficiency.
    4. Snapshot Technology: The NAS supports snapshot technology, enabling you to take point-in-time copies of your data. This feature allows for quick recovery in case of accidental data loss or corruption.
    5. Remote Replication: The DR-3516P supports remote replication, allowing you to create backups of your data on another NAS device in a different location. This ensures data availability and protection against site-specific disasters.
    6. Backup Scheduling: You can schedule automatic backups at specific intervals, ensuring that your data is consistently backed up without manual intervention.
    7. Backup Compression and Encryption: The NAS offers compression and encryption options for your backups. Compression reduces the backup size, saving storage space, while encryption ensures data security and privacy.
    8. Multiple Backup Methods: The DR-3516P supports various backup methods, including file-level backup, folder backup, and full system backup. This flexibility allows you to choose the most suitable backup approach based on your requirements.
    9. User-friendly Interface: The NAS provides an intuitive and user-friendly interface, making it easy to configure backup settings, monitor backup status, and manage your data.
    10. Scalability: The device is scalable, allowing you to expand its storage capacity as your backup needs grow. You can add additional hard drives or connect external storage devices to accommodate more data.

    Overall, the NAS Idis DR-3516P offers a range of features and capabilities that make it a reliable and efficient solution for data backup purposes.

  • How does the NAS Idis DR-3516P ensure data security and reliability during the backup process?

    The NAS Idis DR-3516P ensures data security and reliability during the backup process through several features and mechanisms:

    1. RAID (Redundant Array of Independent Disks): The NAS supports various RAID configurations, such as RAID 1, 5, 6, and 10, which provide data redundancy and protection against disk failures. In case of a disk failure, the system can rebuild the data from the remaining disks, ensuring data reliability.
    2. Snapshot Technology: The NAS utilizes snapshot technology to create point-in-time copies of data. This allows users to easily restore previous versions of files or folders in case of accidental deletion or modification, enhancing data reliability.
    3. Data Encryption: The NAS supports data encryption mechanisms to protect sensitive information during backup. It uses encryption algorithms like AES (Advanced Encryption Standard) to encrypt data at rest, ensuring data security.
    4. Access Control and User Management: The NAS provides comprehensive access control and user management features. Administrators can assign different access rights and permissions to users, ensuring that only authorized personnel can access and modify the backup data, enhancing data security.
    5. Network Security: The NAS supports various network security protocols like SSL/TLS (Secure Sockets Layer/Transport Layer Security) for secure data transfer over the network. It also offers features like IP blocking, firewall, and VPN (Virtual Private Network) support to protect against unauthorized access and ensure data security.
    6. Redundant Power Supply: The NAS is equipped with redundant power supplies, ensuring continuous operation even in case of a power supply failure. This prevents data loss or corruption during the backup process, enhancing data reliability.
    7. Data Integrity Checks: The NAS employs data integrity checks, such as checksums, to verify the integrity of data during the backup process. This ensures that the data remains intact and unaltered, enhancing data reliability.
    8. Automatic Backup Scheduling: The NAS allows users to schedule automatic backups at regular intervals. This ensures that data is backed up regularly and consistently, reducing the risk of data loss and enhancing data reliability.

    Overall, the NAS Idis DR-3516P incorporates various features and mechanisms to ensure data security and reliability during the backup process, protecting against data loss, unauthorized access, and ensuring the integrity of the backup data.

  • Can you explain the steps involved in setting up and configuring data backup on the NAS Idis DR-3516P?

    To set up and configure data backup on the NAS Idis DR-3516P, you can follow these steps:

    1. Connect the NAS: Connect the NAS device to your network using an Ethernet cable. Ensure that the NAS and your computer are on the same network.
    2. Access the NAS interface: Open a web browser on your computer and enter the IP address of the NAS in the address bar. This will take you to the NAS interface.
    3. Login: Enter your username and password to log in to the NAS interface. If you haven't set up any credentials, consult the user manual or use the default login credentials provided by the manufacturer.
    4. Configure storage: Set up the storage capacity and RAID configuration on the NAS. This step involves initializing the hard drives, creating volumes, and configuring RAID levels for data redundancy.
    5. Set up backup destination: Navigate to the backup settings section in the NAS interface. Here, you can specify the destination where you want to backup your data. This can be an external hard drive connected to the NAS, a network location, or a cloud storage service.
    6. Select backup source: Choose the files or folders that you want to back up. You can select specific directories or the entire NAS storage.
    7. Configure backup schedule: Set up a backup schedule to determine when and how often the backup will run. You can choose daily, weekly, or monthly backups and specify the time of day for the backup to start.
    8. Set backup options: Configure additional backup options such as incremental or differential backups, compression, encryption, and file versioning. These options may vary depending on the backup software or NAS firmware.
    9. Test and run backup: Before running the backup, perform a test backup to ensure that everything is configured correctly. Once the test backup is successful, you can start the backup process.
    10. Monitor and manage backups: Monitor the backup progress and check for any errors or warnings. You can also manage backup settings, modify schedules, and review backup logs through the NAS interface.

    Remember to regularly check the backup logs and perform periodic tests to ensure the integrity and reliability of your data backups.
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