How to recover data from QNAP REXP-1220U-RP 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 REXP-1220U-RP

QNAP REXP-1220U-RP NAS Data Recovery in 2024

In this step-by-step tutorial, we’ll show you how to rebuild your RAID and recover data from REXP-1220U-RP.

How to recover data from NAS QNAP REXP-1220U-RP

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.

How can data fragmentation impact data availability and potential loss on NAS QNAP REXP-1220U-RP devices?

Data fragmentation can have a significant impact on data availability and potential loss on NAS QNAP REXP-1220U-RP devices. Here's how:

  1. Reduced Performance: Fragmented data leads to scattered storage blocks across the disks, resulting in slower read and write operations. This can cause performance degradation and increased latency, affecting data availability.
  2. Increased Disk Wear: Fragmentation requires additional disk head movements to access scattered data blocks, leading to increased wear and tear on the hard drives. This can result in higher chances of disk failure and potential data loss.
  3. Limited Storage Capacity: Fragmentation can consume more storage space than necessary. When files are fragmented, free space is scattered across the disks, making it difficult to efficiently utilize the available storage capacity. This can lead to premature storage capacity exhaustion and affect data availability.
  4. Difficulty in Data Recovery: In case of data loss or disk failure, fragmented data can complicate the data recovery process. The scattered nature of the fragmented data makes it harder to recover files and may require specialized recovery tools or services.
  5. Increased Backup Time: Fragmented data can significantly increase the time required for backups. The backup process needs to read scattered data blocks, resulting in longer backup windows. This can impact data availability during the backup process and increase the risk of data loss if backups are not completed regularly.

To mitigate these issues, it is important to regularly defragment the storage drives on NAS QNAP REXP-1220U-RP devices. Defragmentation rearranges the fragmented data blocks, improving performance, reducing disk wear, optimizing storage capacity, and simplifying data recovery processes. Additionally, implementing a regular backup strategy and monitoring disk health can help ensure data availability and minimize potential loss.

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

Although NAS REXP-1220U-RP 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 REXP-1220U-RP. 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

REXP-1220U-RP has 12 HDD slots, and it supports the following array types:

  • RAID 50;
  • RAID 60;
  • RAID 6;
  • RAID 5;
  • RAID 10;
  • RAID 0;
  • RAID 1;
  • JBOD;

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 REXP-1220U-RP 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 REXP-1220U-RP, feel free to leave a comment!
  • Wilf Lampkin
    Wilf Lampkin 16.09.2023 00:47 #
    Can data recovery from a NAS QNAP REXP-1220U-RP device be done remotely?
    • Hetman Software
      Hetman Software 16.09.2023 01:59 #

      Yes, data recovery from a NAS QNAP REXP-1220U-RP device can be done remotely in certain cases. However, it depends on the specific situation and the capabilities of the NAS device.

      If the NAS device has remote access capabilities enabled, such as remote management or remote desktop access, it may be possible to remotely connect to the device and perform data recovery operations. This typically requires the user to have the necessary credentials and network access to connect to the NAS remotely.

      However, if the NAS device is not accessible remotely or if the data loss is due to hardware failure or other complex issues, it may be necessary to physically access the device for data recovery. In such cases, it is recommended to contact a professional data recovery service provider who can assess the situation and determine the best course of action.

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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 primary security features of the NAS QNAP REXP-1220U-RP that ensure secure file access?

    The NAS QNAP REXP-1220U-RP offers several security features to ensure secure file access. Some of the primary security features include:

    1. Access Control: The NAS supports comprehensive access control mechanisms, including user-based permissions, group-based permissions, and folder-level permissions. This allows administrators to control who can access specific files and folders.
    2. Secure Remote Access: The NAS supports secure remote access protocols such as SSL/TLS encryption and VPN (Virtual Private Network) connections. This ensures that data transmitted between the NAS and remote devices is encrypted and secure.
    3. IP Access Control: Administrators can configure IP access control lists to restrict access to the NAS based on specific IP addresses or IP ranges. This helps in preventing unauthorized access from unknown or untrusted sources.
    4. Two-Factor Authentication (2FA): The NAS supports two-factor authentication, adding an extra layer of security to user login. This requires users to provide an additional authentication code, typically generated by a mobile app, along with their username and password.
    5. Antivirus Protection: The NAS includes built-in antivirus software that can scan files and folders for malware and other security threats. It helps in detecting and preventing the spread of malicious files within the NAS system.
    6. Data Encryption: The NAS supports AES 256-bit encryption for data stored on the drives. This ensures that even if the drives are physically stolen or accessed without authorization, the data remains encrypted and unreadable.
    7. Network Security: The NAS supports various network security protocols, including firewall settings, network access protection, and network isolation. These features help in preventing unauthorized access and protecting the NAS from network-based attacks.
    8. Event Notifications and Logs: The NAS provides event notifications and logs that allow administrators to monitor and track file access activities. This helps in identifying any suspicious or unauthorized access attempts and taking appropriate actions.

    Overall, these security features work together to provide a secure file access environment, protecting the data stored on the NAS QNAP REXP-1220U-RP from unauthorized access and ensuring the confidentiality and integrity of the files.

  • How does the NAS QNAP REXP-1220U-RP handle user authentication and access control to prevent unauthorized file access?

    The NAS QNAP REXP-1220U-RP primarily serves as an expansion unit for QNAP NAS devices, providing additional storage capacity. As such, it does not directly handle user authentication and access control. These functions are typically managed by the QNAP NAS device to which the REXP-1220U-RP is connected.

    QNAP NAS devices offer various user authentication and access control mechanisms to prevent unauthorized file access. Some of the common methods include:

    1. User Accounts: The QNAP NAS supports the creation of user accounts with unique usernames and passwords. These accounts can be assigned specific access rights and permissions to folders and files.
    2. User Groups: Users can be grouped together, and access permissions can be assigned to the entire group instead of individual users. This simplifies the management of access control.
    3. Access Control Lists (ACL): ACLs allow fine-grained control over file and folder permissions. Administrators can define specific access rights for individual users or groups, such as read-only, read-write, or no access.
    4. Shared Folder Permissions: QNAP NAS devices allow administrators to set permissions for shared folders, specifying who can access, modify, or delete files within those folders.
    5. Windows Active Directory (AD) Integration: QNAP NAS devices can integrate with Windows AD, allowing users to log in using their AD credentials and inherit their permissions from the AD domain.
    6. Two-Factor Authentication (2FA): QNAP NAS supports 2FA, adding an extra layer of security by requiring users to provide a second form of authentication, such as a mobile app-generated code or a fingerprint scan.
    7. IP Access Control: Administrators can restrict access to the QNAP NAS based on IP addresses or ranges, allowing only specific devices or networks to connect.

    By leveraging these authentication and access control mechanisms provided by the QNAP NAS device, the NAS QNAP REXP-1220U-RP ensures that only authorized users can access the files stored within it.

  • Can the NAS QNAP REXP-1220U-RP integrate with existing security protocols or systems to enhance file access security?

    Yes, the NAS QNAP REXP-1220U-RP can integrate with existing security protocols or systems to enhance file access security. QNAP NAS devices support various security features such as access control lists (ACLs), user and group permissions, IP blocking, and SSL/TLS encryption for data transmission. Additionally, QNAP NAS devices can integrate with existing authentication systems like Active Directory (AD) or LDAP for centralized user management and authentication. This allows you to leverage your existing security protocols and systems to enhance file access security on the QNAP NAS.

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