How to recover data from Buffalo TeraStation WS5220DN04W6 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 Buffalo TeraStation WS5220DN04W6

Buffalo TeraStation WS5220DN04W6 NAS Data Recovery in 2024

In this step-by-step tutorial, we’ll show you how to rebuild your RAID and recover data from TeraStation WS5220DN04W6.

How to recover data from NAS Buffalo TeraStation WS5220DN04W6

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 Buffalo 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 a NAS Buffalo TeraStation WS5220DN04W6 device's network throughput or bandwidth capacity affect data transfer and potential loss?

The network throughput or bandwidth capacity of a NAS Buffalo TeraStation WS5220DN04W6 device can have a significant impact on data transfer and potential loss. Here's how:

  1. Data Transfer Speed: The network throughput determines how quickly data can be transferred between the NAS device and other devices on the network. If the network throughput is low, it will take longer to transfer large files or a large volume of data, resulting in slower data transfer speeds.
  2. Latency: Network throughput also affects the latency or delay in data transfer. Higher throughput allows for lower latency, resulting in faster response times and better performance. Conversely, lower throughput can increase latency, leading to slower data transfer and potential loss.
  3. Potential Data Loss: Insufficient network throughput can cause data loss during transfer. If the network is unable to handle the data transfer speed or volume, packets may be dropped or corrupted, resulting in incomplete or damaged files. This can lead to data loss or the need for retransmission, increasing the chances of errors or failures.
  4. Concurrent Users: The network throughput capacity also determines the number of concurrent users or devices that can access the NAS device simultaneously. If the throughput is limited, multiple users accessing the NAS at the same time may experience slower speeds or even network congestion, affecting data transfer performance and potentially leading to data loss.

To mitigate these issues, it is essential to ensure that the network infrastructure can support the required throughput for the NAS device. This may involve upgrading network equipment, such as switches or routers, to handle higher speeds or implementing network optimization techniques like Quality of Service (QoS) to prioritize NAS traffic.

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

Although NAS TeraStation WS5220DN04W6 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 Buffalo TeraStation WS5220DN04W6. 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 Buffalo

How to recover data from a Buffalo

TeraStation WS5220DN04W6 has 2 HDD slots, and it supports the following array types:

  • RAID 0;
  • RAID 1;
  • JBOD;

NAS supports:

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

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 Buffalo TeraStation WS5220DN04W6 network-attached storage keeps Windows Storage Server 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 TeraStation WS5220DN04W6, feel free to leave a comment!
  • Israel Oakley
    Israel Oakley 1.09.2023 06:48 #
    Can data recovery from a NAS Buffalo TeraStation WS5220DN04W6 device be performed if there are issues with the storage pool or configurations?
    • Hetman Software
      Hetman Software 1.09.2023 07:00 #

      Yes, data recovery from a NAS Buffalo TeraStation WS5220DN04W6 device can be performed even if there are issues with the storage pool or configurations. However, it is important to note that the process may be more complex and require specialized knowledge and tools.

      In case of issues with the storage pool or configurations, it is recommended to contact a professional data recovery service provider who specializes in NAS devices. They will have the expertise and experience to handle such situations and recover the data from the device.

      Attempting to recover data without proper knowledge or tools may lead to further data loss or damage, so it is advisable to seek professional help in such cases.

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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 virtualization features offered by the NAS Buffalo TeraStation WS5220DN04W6?

    The NAS Buffalo TeraStation WS5220DN04W6 offers the following virtualization features:

    1. Virtualization-ready: The NAS is designed to be compatible with virtualization technologies, allowing you to integrate it into your virtual environment seamlessly.
    2. VMware Certification: The TeraStation WS5220DN04W6 is VMware-certified, which means it has undergone rigorous testing and meets the standards set by VMware for compatibility and performance.
    3. iSCSI support: The NAS supports iSCSI (Internet Small Computer System Interface), which allows you to connect to storage devices over a network and use them as if they were locally attached. This enables you to create virtual disks and allocate them to virtual machines.
    4. High availability (HA) support: The TeraStation WS5220DN04W6 supports high availability, which ensures continuous availability of your virtual machines by automatically switching to a backup NAS in case of a failure.
    5. Virtualization management: The NAS comes with Buffalo's own NAS Navigator software, which provides a user-friendly interface for managing and configuring virtualization features. It allows you to create virtual disks, set up iSCSI targets, and monitor the performance of your virtual environment.

    Overall, these virtualization features make the NAS Buffalo TeraStation WS5220DN04W6 a suitable choice for businesses or individuals looking to integrate storage into their virtualized environments.

  • How does the NAS Buffalo TeraStation WS5220DN04W6 support virtualization in a business environment?

    The NAS Buffalo TeraStation WS5220DN04W6 supports virtualization in a business environment through its various features and capabilities. Here are some ways it supports virtualization:

    1. Virtual Machine Integration: The TeraStation WS5220DN04W6 is compatible with popular virtualization platforms such as VMware vSphere and Microsoft Hyper-V. It can be seamlessly integrated into existing virtualized environments, allowing businesses to leverage their virtualization infrastructure.
    2. High Performance: The NAS is equipped with powerful hardware, including an Intel Xeon processor and ample RAM, which ensures high-performance virtualization. It can handle multiple virtual machines (VMs) simultaneously, providing efficient resource allocation and utilization.
    3. Storage Consolidation: The TeraStation WS5220DN04W6 offers a large storage capacity, allowing businesses to consolidate their VMs and store them centrally. This consolidation simplifies management and reduces the need for individual storage solutions for each VM, resulting in cost savings and improved efficiency.
    4. Data Protection and Recovery: The NAS supports RAID configurations, including RAID 1, 5, and 6, which provide data redundancy and protection against drive failures. This is crucial in a virtualized environment where multiple VMs rely on shared storage. In case of a disk failure, the NAS ensures data integrity and allows for quick recovery.
    5. Backup and Replication: The TeraStation WS5220DN04W6 offers built-in backup and replication features, enabling businesses to create copies of their VMs and store them offsite or on another TeraStation device. This ensures data availability and disaster recovery options for virtualized environments.
    6. iSCSI Support: The NAS supports iSCSI (Internet Small Computer System Interface), allowing businesses to create virtualized storage volumes that can be directly attached to VMs. This provides flexibility in allocating storage resources to virtual machines and improves performance by eliminating network latency.
    7. Virtual Desktop Infrastructure (VDI) Support: The TeraStation WS5220DN04W6 is capable of supporting virtual desktop infrastructure, allowing businesses to deploy and manage virtual desktops for their employees. This enables centralized control, reduces hardware costs, and provides a consistent user experience.

    Overall, the NAS Buffalo TeraStation WS5220DN04W6 facilitates virtualization in a business environment by providing robust hardware, storage consolidation, data protection, backup and replication capabilities, iSCSI support, and virtual desktop infrastructure support.

  • Can you provide specific examples of how the virtualization features of the NAS Buffalo TeraStation WS5220DN04W6 can benefit businesses?

    Certainly! The virtualization features of the NAS Buffalo TeraStation WS5220DN04W6 can benefit businesses in several ways. Here are some specific examples:

    1. Cost savings: By utilizing virtualization, businesses can run multiple virtual machines on a single physical server, reducing the need for purchasing and maintaining multiple hardware devices. This can result in significant cost savings in terms of hardware, power consumption, and IT management.
    2. Improved efficiency: Virtualization allows businesses to consolidate their server infrastructure, leading to better resource utilization. With the TeraStation WS5220DN04W6, businesses can create and manage multiple virtual machines, making it easier to allocate resources based on workload requirements. This improves overall efficiency and ensures optimal utilization of available resources.
    3. Enhanced disaster recovery: The TeraStation WS5220DN04W6 supports virtual machine replication, which enables businesses to create redundant copies of their virtual machines. In the event of a hardware failure or system crash, these replicated virtual machines can be quickly activated, minimizing downtime and ensuring business continuity.
    4. Simplified IT management: Virtualization simplifies IT management by centralizing the administration of multiple virtual machines. With the TeraStation WS5220DN04W6, businesses can easily create, deploy, and manage virtual machines using the integrated virtualization platform. This reduces the complexity of managing individual physical servers and allows IT staff to focus on more strategic tasks.
    5. Scalability and flexibility: Virtualization provides businesses with the flexibility to scale their IT infrastructure as needed. The TeraStation WS5220DN04W6 supports features like live migration, which allows businesses to move virtual machines between physical servers without interrupting services. This makes it easier to adapt to changing business requirements and ensures seamless scalability.

    Overall, the virtualization features of the NAS Buffalo TeraStation WS5220DN04W6 offer businesses the opportunity to optimize their IT infrastructure, reduce costs, improve efficiency, and enhance disaster recovery capabilities.

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