How to recover data from QNAP VS-4112U-RP Pro+ 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 VS-4112U-RP Pro+

QNAP VS-4112U-RP Pro+ NAS Data Recovery in 2024

In this step-by-step tutorial, we’ll show you how to rebuild your RAID and recover data from VS-4112U-RP Pro+.

How to recover data from NAS QNAP VS-4112U-RP Pro+

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.

Are there any specific file system repair or recovery tools recommended for NAS QNAP VS-4112U-RP Pro+ devices?

Yes, QNAP recommends using the following file system repair and recovery tools for their NAS devices, including the QNAP VS-4112U-RP Pro+:

  1. QNAP NAS Data Recovery: This is a specialized software tool developed by QNAP for recovering deleted, formatted, or lost data from QNAP NAS devices. It supports various file systems, including NTFS, FAT, HFS+, and EXT4.
  2. TestDisk: It is a powerful open-source data recovery tool that can be used to recover lost partitions and repair file systems. It supports a wide range of file systems, including NTFS, FAT, exFAT, HFS+, and EXT.
  3. EaseUS Data Recovery Wizard: This is a popular data recovery software that supports NAS devices. It can recover accidentally deleted files, formatted partitions, and lost data from various file systems.
  4. R-Studio: It is a comprehensive data recovery software that supports NAS devices and can recover data from various file systems. It provides advanced features for file system repair and recovery.

It is important to note that before attempting any file system repair or recovery, it is recommended to consult the official documentation or support channels provided by QNAP for specific instructions and guidance related to your device model.

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

Although NAS VS-4112U-RP Pro+ 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 VS-4112U-RP Pro+. 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

VS-4112U-RP Pro+ has 4 HDD slots, and it supports the following array types:

  • 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 VS-4112U-RP Pro+ 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 VS-4112U-RP Pro+, feel free to leave a comment!
  • Adrien Beckley
    Adrien Beckley 17.09.2023 15:40 #
    Can data recovery from a NAS QNAP VS-4112U-RP Pro+ device be done remotely?
    • Hetman Software
      Hetman Software 17.09.2023 16:00 #

      Yes, data recovery from a NAS QNAP VS-4112U-RP Pro+ device can be done remotely in some cases. It depends on the specific situation and the capabilities of the data recovery service provider.

      If the NAS device is accessible over the network and the data recovery service provider has the necessary expertise and tools, they may be able to remotely access the device and perform the recovery process. This typically involves establishing a secure connection to the NAS device and using specialized software to recover the data.

      However, in some cases, remote data recovery may not be possible. For example, if the NAS device is physically damaged or experiencing hardware failures, it may require on-site assistance or shipment to a data recovery lab for further analysis and recovery attempts.

      It is recommended to consult with a professional data recovery service provider to evaluate the specific situation and determine the best course of action for recovering data from a NAS device remotely or otherwise.

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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 (Internet Small Computer System Interface) is a protocol that allows the transmission of SCSI (Small Computer System Interface) commands over an IP-based network. It enables the connection of storage devices over a network, allowing remote access to storage resources.

    Here's how iSCSI works:

    1. Initiator: The initiator is a client device that initiates a request for storage resources. It could be a server, computer, or any device that requires access to storage.
    2. Target: The target is the storage device or server that provides the storage resources. It could be a disk array, a storage server, or any device with storage capacity.
    3. TCP/IP Network: The initiator and target communicate with each other over a TCP/IP network, typically using Ethernet.
    4. Discovery: The initiator discovers available targets on the network using the iSCSI discovery process. It sends broadcast or multicast messages to find available targets.
    5. Login: Once the target is discovered, the initiator establishes a connection by logging in to the target. This involves authentication and negotiation of parameters like security, access control, and session settings.
    6. SCSI Commands: After the login process, the initiator can send SCSI commands to the target. These commands include read, write, and other storage-related operations.
    7. Data Transfer: The target processes the SCSI commands and performs the requested operations on the storage resources. It then sends the data back to the initiator over the network.
    8. Data Integrity: iSCSI ensures data integrity by using TCP/IP's reliable data delivery mechanisms, including error detection and correction.

    Overall, iSCSI allows the initiator to access storage resources on the target as if they were directly attached to the initiator's local system. It provides a flexible and cost-effective way to utilize remote storage resources over a network.

  • What are the benefits of using iSCSI for network storage?

    There are several benefits of using iSCSI (Internet Small Computer System Interface) for network storage:

    1. Cost-effective: iSCSI uses existing Ethernet infrastructure, eliminating the need for dedicated storage networks. This reduces the cost of implementing and managing storage solutions.
    2. Flexibility: iSCSI allows storage resources to be easily shared and accessed over a network, providing flexibility in storage management. It enables centralized storage management and allows multiple servers to access the same storage resources simultaneously.
    3. Scalability: iSCSI supports scalability, allowing organizations to easily add more storage capacity as needed. Additional storage devices can be added to the network without disrupting existing infrastructure.
    4. Performance: iSCSI offers high-performance data transfer rates, comparable to Fibre Channel. It utilizes TCP/IP protocols, which are widely supported and optimized for data transmission over IP networks.
    5. Ease of implementation: iSCSI is relatively easy to implement and configure compared to other storage protocols. It leverages existing Ethernet infrastructure, making it simpler to integrate with existing networks.
    6. Compatibility: iSCSI is compatible with a wide range of operating systems and platforms, including Windows, Linux, and VMware. This compatibility ensures interoperability and allows for seamless integration into existing IT environments.
    7. Data protection: iSCSI supports various data protection mechanisms, such as encryption and authentication, to ensure the security and integrity of stored data. This helps organizations meet compliance requirements and protect sensitive information.

    Overall, iSCSI provides a cost-effective, flexible, and scalable solution for network storage, making it a popular choice for organizations of all sizes.

  • Does the NAS QNAP VS-4112U-RP Pro+ support iSCSI protocol and what are its capabilities in terms of iSCSI functionality?

    Yes, the NAS QNAP VS-4112U-RP Pro+ does support the iSCSI protocol. In terms of iSCSI functionality, it has several capabilities:

    1. Virtualization Support: It can be used as a storage solution for virtualization environments such as VMware, Citrix, and Microsoft Hyper-V.
    2. Multiple LUNs: It supports the creation of multiple LUNs (Logical Unit Numbers) on a single NAS device, allowing for efficient storage allocation and management.
    3. Thin Provisioning: The NAS supports thin provisioning, which allows for the creation of virtual volumes that can be dynamically expanded as needed, optimizing storage utilization.
    4. MPIO and MC/S: It supports Multipath I/O (MPIO) and Multiple Connections per Session (MC/S), providing high availability and load balancing for iSCSI connections.
    5. Snapshot and Clone: The NAS supports snapshot and clone features for iSCSI LUNs, enabling data protection and efficient data recovery.
    6. iSCSI LUN Backup/Restore: It provides backup and restore functionality for iSCSI LUNs, ensuring data integrity and disaster recovery.
    7. iSCSI Target/Initiator: The NAS can function as both an iSCSI target and initiator, allowing it to connect to other iSCSI targets or provide iSCSI storage to other devices.

    Overall, the QNAP VS-4112U-RP Pro+ offers comprehensive iSCSI functionality, making it suitable for various storage and virtualization scenarios.

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