How to recover data from Uniview VX1848-V2 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 Uniview VX1848-V2

Uniview VX1848-V2 NAS Data Recovery in 2024

In this step-by-step tutorial, we’ll show you how to rebuild your RAID and recover data from VX1848-V2.

How to recover data from NAS Uniview VX1848-V2

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 Uniview 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 improper network configuration or firewall settings result in data loss on NAS Uniview VX1848-V2 devices?

Improper network configuration or firewall settings can potentially result in data loss on NAS Uniview VX1848-V2 devices.

If the network configuration is not properly set up, it may lead to connectivity issues between the NAS device and the network. This can result in data loss if the NAS is unable to properly access or transfer data to and from the network.

Similarly, if the firewall settings are not configured correctly, they may block necessary network traffic required for the NAS device to function properly. This can lead to data loss if the NAS is unable to communicate with other devices or access the necessary resources.

It is important to ensure that the network configuration and firewall settings are properly configured to allow seamless connectivity and data transfer for NAS devices to prevent data loss.

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

Although NAS VX1848-V2 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 Uniview VX1848-V2. 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 Uniview

How to recover data from a Uniview

VX1848-V2 has 48 HDD slots, and it supports the following array types:

  • RAID 0;
  • RAID 1;
  • RAID 5;
  • RAID 6;
  • RAID 50;
  • RAID 60;
  • 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 Uniview VX1848-V2 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 VX1848-V2, feel free to leave a comment!
  • David Abbiss
    David Abbiss 9.09.2023 19:38 #
    Can data recovery from a NAS Uniview VX1848-V2 device be done if the disks have been reformatted?
    • Hetman Software
      Hetman Software 9.09.2023 19:59 #

      Data recovery from a NAS device, such as the Uniview VX1848-V2, can be challenging, especially if the disks have been reformatted. Reformatting typically involves erasing the file system and replacing it with a new one, which can result in the loss of data.

      However, it may still be possible to recover some or all of the data depending on various factors:

      1. Time elapsed: If the reformatting was recent and no new data has been written to the disks since then, there is a higher chance of recovering the lost data.
      2. Type of reformatting: If the reformatting was a quick format, it only erases the file system metadata, making data recovery more feasible. However, a full format that overwrites the entire disk reduces the chances of recovery.
      3. Data recovery tools: Specialized data recovery software or services may be able to scan the disks and recover some of the lost data. These tools can often retrieve data that has not been overwritten.

      It is important to note that attempting data recovery on your own may further complicate the process and potentially result in permanent data loss. It is recommended to consult with a professional data recovery service experienced in NAS devices to maximize the chances of successful recovery.

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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 RAID technology enhance the performance and data reliability of the NAS Uniview VX1848-V2?

    RAID (Redundant Array of Independent Disks) technology enhances the performance and data reliability of the NAS Uniview VX1848-V2 in the following ways:

    1. Data Redundancy: RAID technology allows for the creation of redundant copies of data across multiple hard drives. In the VX1848-V2, it supports RAID levels 0, 1, 5, 6, and 10. RAID 1, for example, mirrors the data on two drives, ensuring that if one drive fails, the data remains intact on the other drive. This redundancy enhances data reliability and minimizes the risk of data loss.
    2. Improved Performance: RAID technology also enhances performance by distributing data across multiple drives. RAID 0, for instance, stripes data across multiple drives, enabling faster read and write speeds. This can be particularly beneficial for applications or tasks that require high-speed data access, such as video surveillance systems.
    3. Hot-swappable Drives: The NAS Uniview VX1848-V2 supports hot-swappable drive bays, which means that failed drives can be replaced without shutting down the system. This feature allows for seamless drive replacement and minimizes downtime, ensuring continuous data availability and system performance.
    4. Data Protection: RAID technology offers various levels of data protection. RAID 5, for example, combines data striping with parity information across multiple drives. This means that even if one drive fails, the data can be reconstructed using the parity information stored on the remaining drives. RAID 6 provides an additional level of protection by allowing for the failure of two drives simultaneously. These data protection mechanisms enhance the reliability and integrity of stored data.

    Overall, RAID technology in the NAS Uniview VX1848-V2 enhances performance through improved data access speeds and provides data reliability through redundancy and protection mechanisms. This makes it a suitable solution for applications that require high-performance storage and data integrity, such as video surveillance systems.

  • What RAID configurations are supported by the NAS Uniview VX1848-V2 and how do they impact storage capacity and data redundancy?

    The NAS Uniview VX1848-V2 supports the following RAID configurations:

    1. RAID 0: This configuration stripes the data across multiple drives, offering increased performance and storage capacity. However, there is no data redundancy, meaning that if one drive fails, all data is lost.
    2. RAID 1: This configuration mirrors the data across multiple drives, providing data redundancy. Each drive contains an exact copy of the data, so if one drive fails, the other drive can still function and provide access to the data. However, the storage capacity is halved as one drive is used for redundancy.
    3. RAID 5: This configuration stripes the data across multiple drives like RAID 0, but also includes parity information on each drive. This allows for data recovery in case of a single drive failure. RAID 5 offers a good balance between performance, storage capacity, and data redundancy.
    4. RAID 6: This configuration is similar to RAID 5 but includes double parity information, allowing for recovery from two simultaneous drive failures. RAID 6 provides higher data redundancy but reduces the storage capacity compared to RAID 5.
    5. RAID 10: This configuration combines RAID 1 and RAID 0. It mirrors the data across pairs of drives and then stripes the mirrored pairs. RAID 10 offers both high performance and data redundancy. However, it requires a minimum of four drives and has a storage capacity equal to half the total drive capacity.

    The choice of RAID configuration impacts storage capacity and data redundancy. RAID 0 provides the highest storage capacity but no data redundancy. RAID 1 and RAID 10 offer data redundancy but reduce storage capacity. RAID 5 and RAID 6 provide a balance between storage capacity, performance, and data redundancy, with RAID 6 offering higher redundancy at the cost of reduced storage capacity.

  • Can the NAS Uniview VX1848-V2 support hot-swapping of hard drives in a RAID configuration? If so, how does this feature contribute to system maintenance and data availability?

    Yes, the NAS Uniview VX1848-V2 does support hot-swapping of hard drives in a RAID configuration. This feature allows you to replace or add hard drives to the NAS without shutting down the system.

    The hot-swapping feature contributes to system maintenance and data availability in several ways:

    1. Easy drive replacement: If a hard drive fails, you can simply remove it and insert a new one while the system is still running. This minimizes downtime and reduces the impact on system availability.
    2. RAID rebuild: When a new drive is inserted, the NAS will automatically start rebuilding the RAID array using the data from the remaining drives. This ensures data redundancy and protection against drive failures.
    3. Capacity expansion: With hot-swapping, you can add new hard drives to the NAS without interrupting the system. This allows for easy capacity expansion as your storage needs grow.
    4. Continuous data access: Since the NAS remains operational during drive replacement or addition, there is no disruption in accessing stored data. Users can continue to access files and applications without any interruptions.

    Overall, hot-swapping of hard drives in a RAID configuration simplifies system maintenance, reduces downtime, and ensures continuous data availability.

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