How to recover data from Buffalo TeraStation TS3420RN0804 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 TS3420RN0804

Buffalo TeraStation TS3420RN0804 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 TS3420RN0804.

How to recover data from NAS Buffalo TeraStation TS3420RN0804

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 device firmware rollback or downgrading impact data loss risks for NAS Buffalo TeraStation TS3420RN0804 devices?

Yes, device firmware rollback or downgrading can potentially impact data loss risks for NAS Buffalo TeraStation TS3420RN0804 devices. When you perform a firmware rollback or downgrade, there is a chance that the process may not be successful or may encounter errors, which can lead to data corruption or loss.

Additionally, firmware updates often include important bug fixes, security patches, and performance improvements. By downgrading or rolling back the firmware, you may be exposing your device to known vulnerabilities or issues that were addressed in the newer firmware version.

It is always recommended to take proper precautions before performing any firmware update or rollback, such as backing up your data and ensuring you have a reliable power source during the process.

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

Although NAS TeraStation TS3420RN0804 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 TS3420RN0804. 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.

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How to recover data from a Buffalo

How to recover data from a Buffalo

TeraStation TS3420RN0804 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 TS3420RN0804 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

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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 TS3420RN0804, feel free to leave a comment!
  • Max Colgate
    Max Colgate 2.09.2023 02:45 #
    Is it possible to recover data from a NAS Buffalo TeraStation TS3420RN0804 device that has been affected by a controller failure or disk array problem?
    • Hetman Software
      Hetman Software 2.09.2023 03:00 #

      Yes, it is possible to recover data from a NAS Buffalo TeraStation TS3420RN0804 device that has been affected by a controller failure or disk array problem. However, the process of data recovery can be complex and may require the assistance of a professional data recovery service.

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

      1. Check for physical damage: Ensure that the device is not physically damaged and all connections are secure.
      2. Replace faulty components: If the controller or disks are causing the problem, you may need to replace them with new ones. Consult the device's manual or contact Buffalo support for guidance on replacing components.
      3. Seek professional help: If you are not confident in performing the recovery process yourself, it is recommended to contact a professional data recovery service. They have the expertise and specialized tools to recover data from a failed NAS device.
      4. Data recovery process: The data recovery service will typically assess the extent of the damage and attempt to repair or rebuild the RAID array if necessary. They may also use specialized software and techniques to extract data from the disks.

      Note: It is important to avoid any further attempts to recover data on your own if you are not experienced in data recovery. Incorrect actions can potentially cause further damage and make data recovery more difficult or even impossible.

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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.

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Questions and answers

  • How does the NAS Buffalo TeraStation TS3420RN0804 facilitate the process of copying data from different devices?

    The NAS Buffalo TeraStation TS3420RN0804 facilitates the process of copying data from different devices through various methods:

    1. Network File Sharing: The TeraStation TS3420RN0804 acts as a central storage device on the network, allowing different devices such as computers, laptops, or mobile devices to connect and access the shared folders. Users can simply copy and paste or drag and drop files from their devices to the TeraStation using the network file sharing protocols like SMB/CIFS, AFP, or NFS.
    2. USB Connectivity: The TeraStation TS3420RN0804 is equipped with multiple USB ports, enabling users to connect external storage devices directly to the NAS. By connecting a USB flash drive, external hard drive, or any other USB storage device, users can copy data from these devices to the TeraStation, or vice versa, by using the NAS management interface.
    3. Cloud Integration: The TeraStation TS3420RN0804 offers cloud integration capabilities, allowing users to copy data from different devices to popular cloud storage services like Dropbox, Google Drive, or Amazon S3. With the NAS management interface, users can configure cloud backups or sync folders between the TeraStation and cloud storage, making it easier to transfer data from various devices.
    4. Remote Access: The TeraStation TS3420RN0804 supports remote access, enabling users to copy data from their devices even when they are not physically present in the network. By using the Buffalo WebAccess or other remote access methods, users can securely connect to the TeraStation from anywhere and copy files to or from their devices.

    Overall, the NAS Buffalo TeraStation TS3420RN0804 provides multiple options for copying data from different devices, including network file sharing, USB connectivity, cloud integration, and remote access. This allows for seamless and convenient data transfer and backup processes.

  • What are the key features and capabilities of the NAS Buffalo TeraStation TS3420RN0804 that make it an effective tool for data copying?

    The NAS Buffalo TeraStation TS3420RN0804 offers several key features and capabilities that make it an effective tool for data copying:

    1. High Storage Capacity: The TS3420RN0804 comes with a total storage capacity of 8TB, which can be expanded up to 128TB. This large storage capacity allows for the efficient copying of large amounts of data.
    2. RAID Support: The NAS supports various RAID levels, including RAID 0, 1, 5, 6, 10, and JBOD. This provides data redundancy and protection against drive failures, ensuring the safety of copied data.
    3. Hot-Swappable Drives: The TS3420RN0804 features hot-swappable drive bays, allowing for easy replacement or expansion of drives without the need to power down the system. This feature enhances the convenience and flexibility of data copying.
    4. High-Speed Data Transfer: With its dual-core Annapurna Labs Alpine AL-314 processor and 4GB of DDR3 RAM, the NAS offers fast data transfer speeds. This enables quick and efficient copying of data, reducing the time required for the process.
    5. Multiple Connectivity Options: The TS3420RN0804 supports multiple connectivity options, including two Gigabit Ethernet ports and two USB 3.0 ports. This allows for seamless integration into existing network infrastructure and facilitates easy copying of data from various sources.
    6. Backup and Synchronization: The NAS comes with built-in backup and synchronization capabilities. It supports various backup methods, including scheduled backups, replication to another TeraStation device, and cloud backup to services like Amazon S3 or Dropbox. This ensures data integrity and provides additional protection against data loss.
    7. User-Friendly Interface: The NAS features an intuitive web-based interface that simplifies the management and configuration of the device. This user-friendly interface makes it easy to set up data copying tasks and monitor their progress.

    Overall, the NAS Buffalo TeraStation TS3420RN0804 offers a combination of high storage capacity, data redundancy, fast data transfer speeds, and convenient features that make it an effective tool for data copying.

  • Can the NAS Buffalo TeraStation TS3420RN0804 copy data from various devices simultaneously, and what are the potential limitations or considerations when using this feature?

    Yes, the NAS Buffalo TeraStation TS3420RN0804 can copy data from various devices simultaneously. It supports multiple data transfer protocols and can handle multiple data streams at once.

    However, there are a few potential limitations and considerations when using this feature:

    1. Bandwidth: The NAS device has a limited network bandwidth, so copying data from multiple devices simultaneously may result in slower transfer speeds for each device. If the network becomes saturated, the transfer speeds may be significantly reduced.
    2. Processing power: Copying data from multiple devices simultaneously requires processing power from the NAS device. If the device is not powerful enough, it may struggle to handle the simultaneous data transfers, leading to slower performance.
    3. Disk I/O: The NAS device has a limited number of hard drives and disk I/O capabilities. If multiple devices are copying data simultaneously, it may increase the disk I/O load, potentially causing slower performance or increased latency.
    4. Network congestion: If multiple devices are copying data simultaneously, it can create network congestion, especially if all devices are connected to the same network switch. This congestion can impact the performance of other network services and devices.

    To mitigate these limitations, it is recommended to:

    • Ensure that the NAS device has sufficient processing power and network bandwidth to handle simultaneous data transfers.
    • Consider using a Gigabit Ethernet network infrastructure to maximize network speeds.
    • Schedule data transfers during off-peak hours to minimize network congestion.
    • Monitor the NAS device's performance and adjust settings if necessary to optimize performance.

    Overall, while the NAS Buffalo TeraStation TS3420RN0804 can copy data from various devices simultaneously, it is important to consider the limitations and plan accordingly to ensure optimal performance.

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