How to recover data from Buffalo TeraStation WS5420DN08W6 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 WS5420DN08W6

Buffalo TeraStation WS5420DN08W6 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 WS5420DN08W6.

How to recover data from NAS Buffalo TeraStation WS5420DN08W6

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.

Can elevation of privileges or compromised user accounts lead to data loss or unauthorized access on NAS Buffalo TeraStation WS5420DN08W6 devices?

Yes, elevation of privileges or compromised user accounts can potentially lead to data loss or unauthorized access on NAS Buffalo TeraStation WS5420DN08W6 devices. If an attacker gains elevated privileges or compromises a user account with administrative access, they may be able to modify or delete data, access sensitive information, or even take control of the device. It is important to implement strong security measures, such as regularly updating firmware, using strong passwords, and restricting user access privileges, to mitigate the risk of such incidents.

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

Although NAS TeraStation WS5420DN08W6 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 WS5420DN08W6. 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 WS5420DN08W6 has 4 HDD slots, and it supports the following array types:

  • RAID 0;
  • RAID 1;
  • RAID 5;
  • RAID 6;
  • 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 WS5420DN08W6 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 WS5420DN08W6, feel free to leave a comment!
  • Drummond Woosley
    Drummond Woosley 1.09.2023 07:38 #
    Is it possible to recover data from a NAS Buffalo TeraStation WS5420DN08W6 device that has been affected by a firmware corruption or update failure?
    • Hetman Software
      Hetman Software 1.09.2023 08:59 #

      Yes, it is possible to recover data from a NAS Buffalo TeraStation WS5420DN08W6 device that has been affected by firmware corruption or update failure. However, the process can be complex and should be done by experienced professionals or with the help of Buffalo's technical support team.

      Here are some general steps that can be followed to recover data from a NAS device:

      1. Contact Buffalo's technical support: They can provide guidance specific to your device and firmware version.
      2. Check for any available firmware updates: Sometimes, Buffalo releases firmware updates to fix known issues or address compatibility problems. If an update is available, it might resolve the corruption or failure issue.
      3. Perform a firmware recovery: Buffalo NAS devices usually have a firmware recovery mode that allows you to restore the firmware to a previous version or factory default settings. This can help in recovering the device and accessing the data.
      4. Use data recovery software: If the firmware recovery does not work or causes further issues, you can try using data recovery software. Connect the NAS device to a computer and use specialized data recovery software to scan and recover the files from the device. However, note that this method may not be successful in all cases, especially if the firmware corruption has caused physical damage to the device.
      5. Seek professional help: If the data is critical and the above methods do not work, it is recommended to seek professional data recovery services. They have specialized tools and expertise to recover data from various storage devices, including NAS devices.

      Remember to always have backups of your important data to avoid data loss in case of firmware corruption or other failures.

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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 necessary steps to connect a printer to a NAS Buffalo TeraStation WS5420DN08W6?

    To connect a printer to a Buffalo TeraStation WS5420DN08W6 NAS, you will need to follow these steps:

    1. Connect the printer to the NAS: Use a USB cable to connect the printer to one of the USB ports on the Buffalo TeraStation NAS.
    2. Access the NAS administration interface: Open a web browser on a computer connected to the same network as the NAS, then enter the IP address of the NAS into the address bar. This will take you to the NAS administration interface.
    3. Login to the NAS: Enter the username and password for the NAS administration interface to log in.
    4. Configure the printer settings: Once logged in, navigate to the "Printers" or "Printer Settings" section in the NAS administration interface. Here, you should see the connected printer listed.
    5. Install printer drivers: If you haven't already done so, you may need to install the appropriate printer drivers on the computer(s) that will be printing to the NAS. This will allow the computer to communicate with the printer.
    6. Share the printer: In the NAS administration interface, select the connected printer and enable printer sharing. This will make the printer available to other devices on the network.
    7. Connect to the shared printer: On the computer(s) that need to print to the shared printer, navigate to the "Printers" or "Devices and Printers" section in the computer's settings. Click on "Add a printer" or "Add a device" and search for network printers. The shared printer connected to the NAS should appear in the list. Select it and follow the prompts to install the printer on the computer.
    8. Test the printer: Once the printer is installed on the computer, try printing a test page or document to ensure that the connection is working properly.

    Note: The exact steps may vary slightly depending on the specific model of the Buffalo TeraStation NAS and the operating system of the computer(s) being used.

  • Are there any specific network settings or protocols that need to be enabled on the NAS Buffalo TeraStation WS5420DN08W6 to ensure successful printer connectivity?

    To ensure successful printer connectivity on the NAS Buffalo TeraStation WS5420DN08W6, you need to enable the following network settings and protocols:

    1. Enable the TCP/IP protocol: This is the most common protocol used for network communication. Make sure TCP/IP is enabled on the NAS to allow printer communication over the network.
    2. Enable DHCP: Dynamic Host Configuration Protocol (DHCP) automatically assigns IP addresses to devices on the network. Enabling DHCP on the NAS will ensure that the printer receives an IP address automatically when connected to the network.
    3. Enable File and Printer Sharing: This setting allows other devices on the network to access the NAS and its shared resources, including printers. Ensure that file and printer sharing is enabled on the NAS.
    4. Enable Bonjour/Zeroconf: Bonjour (also known as Zeroconf) is a network protocol that allows automatic discovery of devices and services on a local network. Enabling Bonjour/Zeroconf on the NAS will help in automatically detecting and connecting to printers on the network.
    5. Enable SNMP: Simple Network Management Protocol (SNMP) allows for the monitoring and management of network devices. Enabling SNMP on the NAS can provide better printer management and monitoring capabilities.
    6. Enable Printer Server Function: The Buffalo TeraStation WS5420DN08W6 has a built-in printer server function. Enable this feature on the NAS to act as a print server and manage printer connections.

    Note: The specific steps to enable these settings may vary depending on the NAS firmware version. Please refer to the NAS documentation or user manual for detailed instructions on enabling these settings.

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