How to recover data from QNAP HS-210-D 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 QNAP HS-210-D

QNAP HS-210-D NAS Data Recovery in 2024

In this step-by-step tutorial, we’ll show you how to rebuild your RAID and recover data from HS-210-D.

How to recover data from NAS QNAP HS-210-D

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 QNAP 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 device firmware rollback or downgrading impact data loss risks for NAS QNAP HS-210-D devices?

Rolling back or downgrading the firmware on a NAS QNAP HS-210-D device can potentially increase the risk of data loss. When you perform a firmware rollback, you are essentially reverting the device to a previous version of the firmware. This process can introduce compatibility issues, security vulnerabilities, and potential bugs that may not have been present in the newer firmware.

If the firmware rollback process is not performed correctly or if there are any issues during the rollback, it can lead to data corruption or loss. It is always recommended to backup your data before attempting any firmware changes on a NAS device.

Additionally, newer firmware updates often include important security fixes and feature enhancements. By downgrading the firmware, you may be missing out on these improvements, leaving your device more vulnerable to potential security threats.

It is advisable to consult the manufacturer's documentation and support channels to understand the potential risks and implications of firmware rollback or downgrading for your specific NAS model.

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

Although NAS HS-210-D 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 QNAP HS-210-D. 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 QNAP

How to recover data from a QNAP

HS-210-D has 2 HDD slots, and it supports the following array types:

  • RAID 1;

NAS supports:

  • ZFS;
  • EXT4;
  • EXT3;
  • exFAT;
  • FAT32 (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 QNAP HS-210-D network-attached storage keeps QTS (QuTS hero) 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 (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 HS-210-D, feel free to leave a comment!
  • Ramsey Manly
    Ramsey Manly 18.09.2023 18:45 #
    Are there any specific software solutions for data recovery from NAS QNAP HS-210-D devices with S.M.A.R.T. errors?
    • Hetman Software
      Hetman Software 18.09.2023 20:00 #

      Yes, there are specific software solutions available for data recovery from NAS QNAP HS-210-D devices with S.M.A.R.T. errors. Some popular software options include:

      1. R-Studio: R-Studio is a powerful data recovery software that supports NAS devices, including QNAP HS-210-D. It can recover data from drives with S.M.A.R.T. errors and various file systems.
      2. EaseUS Data Recovery Wizard: EaseUS Data Recovery Wizard is another popular data recovery software that supports NAS devices. It can recover data from QNAP HS-210-D devices with S.M.A.R.T. errors and offers a user-friendly interface.
      3. GetDataBack: GetDataBack is a data recovery software that specializes in recovering data from various storage devices, including NAS devices. It can handle S.M.A.R.T. errors and has a simple recovery process.

      It is important to note that data recovery from NAS devices with S.M.A.R.T. errors can be a complex task, and it is recommended to consult with a professional data recovery service if the data is critical or if you are not familiar with the recovery process.

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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 is iSCSI and how does it work?

    iSCSI stands for Internet Small Computer System Interface. It is a protocol that allows the transmission of SCSI (Small Computer System Interface) commands over an IP (Internet Protocol) network, typically Ethernet. iSCSI enables the creation of storage area networks (SANs) by extending the SCSI protocol over a network.

    Here's how iSCSI works:

    1. Initiator: The device that initiates the iSCSI communication is called the initiator. It can be a server, workstation, or any device that needs to access storage resources.
    2. Target: The device that provides the storage resources and responds to the initiator's requests is called the target. It can be a dedicated storage device or a logical unit within a storage system.
    3. IP Network: The initiator and target communicate over an IP network, typically Ethernet. The IP network can be a local area network (LAN), wide area network (WAN), or even the internet.
    4. iSCSI Protocol: The initiator sends SCSI commands encapsulated within iSCSI packets over the IP network to the target. These packets are transmitted using TCP/IP or UDP/IP protocols.
    5. Encapsulation and Decapsulation: At the initiator side, the SCSI commands are encapsulated into iSCSI packets by adding additional headers and metadata. At the target side, the iSCSI packets are decapsulated to extract the original SCSI commands.
    6. Data Transfer: Once the SCSI commands are received by the target, it processes them and performs the necessary storage operations like reading or writing data. The target can also send responses and status information back to the initiator.
    7. Block-Level Storage: iSCSI operates at the block level, meaning it allows the initiator to access and control individual blocks of storage rather than entire files. This makes it suitable for various storage applications, including disk arrays, tape libraries, and virtualized storage systems.

    Overall, iSCSI provides a cost-effective and flexible way to connect and utilize remote storage resources over IP networks, enabling centralized storage management and efficient data access.

  • What are the benefits and use cases of using iSCSI in a network storage environment?

    iSCSI (Internet Small Computer System Interface) is a protocol that allows SCSI commands to be sent over an IP network, enabling the use of IP networks to carry storage traffic. Here are some benefits and use cases of using iSCSI in a network storage environment:

    1. Cost-effective: iSCSI leverages existing Ethernet infrastructure, eliminating the need for specialized Fibre Channel (FC) switches and cables. This makes it a more cost-effective solution for network storage.
    2. Flexibility: iSCSI can be used to connect various types of storage systems, including disk arrays, tape libraries, and virtual tape libraries. It provides flexibility in connecting different storage devices to a network.
    3. Scalability: iSCSI supports the use of Ethernet switches, allowing for easy scalability as the storage needs grow. It enables the addition of more storage devices without significant changes to the existing infrastructure.
    4. Remote storage access: iSCSI enables remote storage access over IP networks. This is particularly useful for organizations with multiple locations or remote workers who need access to centralized storage resources.
    5. Data backup and disaster recovery: iSCSI can be used for backup and disaster recovery purposes. It allows for the efficient transfer of data over IP networks, enabling remote backup and replication of data to a secondary site.
    6. Virtualization: iSCSI is commonly used in virtualized environments to provide storage to virtual machines. It allows for efficient storage provisioning and management in virtualized infrastructures.
    7. High performance: With advancements in Ethernet technology, iSCSI can achieve high performance and low latency, making it suitable for demanding applications that require fast access to storage resources.
    8. Storage consolidation: iSCSI enables storage consolidation by centralizing storage resources and providing access to multiple servers over the network. This simplifies storage management and reduces hardware and administrative costs.
    9. Compatibility: iSCSI is compatible with various operating systems and storage devices, making it a widely adopted standard in the industry. It can seamlessly integrate with existing storage infrastructure.

    Overall, iSCSI offers a cost-effective, flexible, and scalable solution for network storage environments, enabling efficient storage provisioning, remote access, data backup, and disaster recovery.

  • Does the NAS QNAP HS-210-D support iSCSI protocol for storage connectivity?

    Yes, the NAS QNAP HS-210-D does support iSCSI protocol for storage connectivity.

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