Ultimate Guide to RAID Array Recovery for NAS Buffalo TeraStation TS3420DN1604

Follow our step-by-step guide to recover data from ⭐ NAS and fix RAID arrays effectively.

Ultimate Guide to RAID Array Recovery for NAS Buffalo TeraStation TS3420DN1604

Buffalo TeraStation TS3420DN1604 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 TS3420DN1604.

Ultimate Guide to RAID Array Recovery for NAS Buffalo TeraStation TS3420DN1604

RAID Recovery™ 2.6
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.

Are there any precautions to take while replacing or upgrading hard drives in NAS Buffalo TeraStation TS3420DN1604 devices?

Yes, there are several precautions to take while replacing or upgrading hard drives in NAS Buffalo TeraStation TS3420DN1604 devices. Here are some important steps to follow:

  1. Backup your data: Before replacing or upgrading any hard drives, it is crucial to back up all your important data. This will ensure that you don't lose any data during the process.
  2. Power off the device: Make sure to power off the TeraStation and disconnect it from the power source before attempting to replace or upgrade the hard drives. This will prevent any electrical accidents or damage to the device.
  3. Ground yourself: To prevent static electricity from damaging the hard drives or other components, it is important to ground yourself before handling the drives. You can do this by wearing an anti-static wrist strap or by touching a grounded metal object.
  4. Follow the manufacturer's instructions: Refer to the user manual or documentation provided by Buffalo for specific instructions on how to replace or upgrade hard drives in the TeraStation. Each device might have slightly different procedures, so it's important to follow the manufacturer's guidelines.
  5. Use compatible drives: Ensure that the replacement or upgraded hard drives are compatible with the TeraStation TS3420DN1604. Check the device's specifications or consult with Buffalo's support to determine the compatible drive models and capacities.
  6. RAID configuration: If your TeraStation is configured in a RAID array, it is important to understand the RAID configuration and how it will be affected by the hard drive replacement or upgrade. Make sure to follow the appropriate steps to maintain the RAID integrity and data redundancy.
  7. Handle drives with care: When removing or inserting hard drives, handle them carefully and avoid touching the connectors or circuit boards. Hold the drives by their edges to prevent any damage from static electricity or physical mishandling.
  8. Secure connections: Ensure that all connections, including power and data cables, are securely attached to the new hard drives. Loose connections can cause data loss or drive failures.
  9. Test and verify: After replacing or upgrading the hard drives, power on the TeraStation and perform a thorough test to ensure that the new drives are functioning properly. Check the device's interface or management software to verify the drive status and data integrity.

If you are uncertain about any step or lack technical expertise, it is recommended to seek professional assistance or consult Buffalo's support for guidance.

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

Although NAS TeraStation TS3420DN1604 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 TS3420DN1604. 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 TS3420DN1604 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 TS3420DN1604 network-attached storage keeps OS Linux 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 TS3420DN1604, feel free to leave a comment!
  • Woodruff Sheldon
    Woodruff Sheldon 1.09.2023 13:44 #
    Is it possible to recover data from a NAS Buffalo TeraStation TS3420DN1604 device that has been affected by a network attack or intrusion?
    • Hetman Software
      Hetman Software 1.09.2023 14:00 #

      Yes, it is possible to recover data from a NAS Buffalo TeraStation TS3420DN1604 device that has been affected by a network attack or intrusion. However, the success of data recovery depends on various factors such as the severity of the attack, the extent of damage to the device, and the measures taken to mitigate the attack.

      Here are some steps you can take to recover data from a compromised NAS device:

      1. Disconnect the NAS device from the network: This will prevent further damage or data loss.
      2. Assess the extent of the attack: Determine the type of attack and the damage caused. This will help in planning the recovery process.
      3. Engage a professional data recovery service: It is recommended to seek the assistance of a professional data recovery service that specializes in NAS devices. They have the expertise and tools required to recover data from compromised systems.
      4. Restore from backups: If you have regular backups of your data, you can restore the data to a new or cleaned NAS device. Make sure to scan the backups for any malware or vulnerabilities before restoring.
      5. Update firmware and security measures: Once the data has been recovered, update the firmware of the NAS device to the latest version and implement robust security measures to prevent future attacks.

      Remember, prevention is always better than recovery. It is crucial to have proper security measures in place, such as strong passwords, regular firmware updates, and network monitoring, to minimize the risk of network attacks and intrusions.

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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 xaker.ru, 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

  • Can the Buffalo TeraStation TS3420DN1604 be used as a storage device for iTunes media libraries?

    Yes, the Buffalo TeraStation TS3420DN1604 can be used as a storage device for iTunes media libraries. It supports various file sharing protocols such as SMB/CIFS, AFP, and NFS, which allows you to store and access your iTunes media libraries. You can configure the TeraStation as a network share and then set the iTunes library location to the network share path on your computer. This way, you can store your iTunes media files on the TeraStation and access them from multiple devices on your network.

  • What steps are required to set up and configure the Buffalo TeraStation TS3420DN1604 for iTunes support?

    To set up and configure the Buffalo TeraStation TS3420DN1604 for iTunes support, follow these steps:

    1. Connect the TeraStation to your network: Plug in the power cord and connect the TeraStation to your router or switch using an Ethernet cable.
    2. Access the TeraStation's web-based configuration: Open a web browser on a computer connected to the same network and enter the TeraStation's IP address in the address bar. The default IP address is typically "".
    3. Log in to the TeraStation: Enter the default username "admin" and password "password" to log in. If you have changed the default credentials, use the updated ones.
    4. Set up shared folders: In the TeraStation's web interface, navigate to "Shared Folders" and create a new shared folder specifically for iTunes media. Make sure the folder is accessible to all users or the specific user you want to grant access to.
    5. Enable DLNA server: DLNA server allows the TeraStation to stream media to compatible devices, including iTunes. In the web interface, go to "Settings" > "Media Server" and enable the DLNA server.
    6. Enable iTunes server: In the web interface, go to "Settings" > "iTunes Server" and enable the iTunes server. You may need to specify the iTunes server name and description.
    7. Configure iTunes settings: Open iTunes on your computer and go to "Preferences" > "Advanced". Check the box for "Share iTunes Library XML with other applications" and click "OK".
    8. Add the TeraStation as a shared library in iTunes: In iTunes, go to "File" > "Library" > "Import Playlist" and select the TeraStation's shared folder that contains your media files. iTunes will scan the folder and add the media to your library.
    9. Access iTunes media from other devices: You should now be able to access the TeraStation's iTunes media from other devices running iTunes or compatible media players. Look for the TeraStation's iTunes server in the shared libraries section.

    Note: It's important to ensure that your media files are in a compatible format supported by iTunes and that they are properly organized within the shared folder.

  • Are there any limitations or compatibility issues when using the Buffalo TeraStation TS3420DN1604 with iTunes, and how can they be resolved?

    There can be limitations and compatibility issues when using the Buffalo TeraStation TS3420DN1604 with iTunes. Some potential issues include:

    1. iTunes Library Location: By default, iTunes stores its media library in the "Music" folder on your computer. If you want to move the iTunes library to the TeraStation, you may encounter compatibility issues. iTunes is designed to work with local storage, and network-attached storage (NAS) devices like the TeraStation may not be fully supported. However, there are workarounds available.
    2. Network Speed and Latency: Accessing iTunes media files over a network can be slower compared to local storage. This can result in longer load times and occasional buffering issues, especially when streaming large media files. The network speed and latency should be considered when using the TeraStation with iTunes.

    To resolve these limitations and compatibility issues, you can try the following:

    1. Move iTunes Library: Instead of moving the entire iTunes library to the TeraStation, you can consider moving only the media files (music, videos, etc.) to the TeraStation. Keep the iTunes library database on your local computer and configure iTunes to reference the media files on the TeraStation. This can be done by going to iTunes Preferences > Advanced and changing the iTunes Media folder location.
    2. Use iTunes Home Sharing: Enable iTunes Home Sharing, which allows you to share your iTunes library between multiple devices on the same network. This can help you access the media files stored on the TeraStation from other devices running iTunes. To enable Home Sharing, go to iTunes Preferences > Sharing and check the "Share my library on my local network" option.
    3. Optimize Network Setup: Ensure that your network setup is optimized for streaming media. Use a wired connection instead of Wi-Fi if possible, as it provides better network speed and stability. Ensure that your network infrastructure (router, switches) is capable of handling high-speed data transfer.
    4. Consider Alternative Media Servers: Instead of relying on iTunes, you can explore alternative media server software that is specifically designed for NAS devices. These software options, such as Plex or Kodi, provide better compatibility with NAS devices and can stream media files from the TeraStation more efficiently.

    It's important to note that compatibility and performance can vary depending on the specific setup and configurations. It's recommended to consult the Buffalo TeraStation documentation and iTunes support resources for more detailed instructions and troubleshooting specific to your setup.

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