How to recover data from Lenovo ThinkSystem SR250 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 Deleted NAS Lenovo ThinkSystem SR250 V2 Files Efficiently

Lenovo ThinkSystem SR250 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 ThinkSystem SR250 V2.

How to Recover Deleted NAS Lenovo ThinkSystem SR250 V2 Files Efficiently

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 Lenovo 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 insufficient power supply or voltage fluctuations cause data loss on NAS Lenovo ThinkSystem SR250 V2 devices?

Insufficient power supply or voltage fluctuations can potentially cause data loss on any electronic device, including NAS (Network Attached Storage) devices like the Lenovo ThinkSystem SR250 V2.

Power supply issues can lead to unexpected shutdowns or unstable operation, which may result in data corruption or loss. Voltage fluctuations can cause similar problems, as they can disrupt the proper functioning of the device's components and storage media.

To mitigate the risk of data loss due to power supply issues or voltage fluctuations, it is recommended to:

  1. Use a reliable and stable power source: Ensure that the NAS device is connected to a stable power outlet or use a UPS (Uninterruptible Power Supply) to provide backup power during power outages or voltage fluctuations.
  2. Properly configure power management settings: Configure the NAS device's power management settings to prevent sudden shutdowns or power-related issues. This may include adjusting sleep or idle settings, setting up automatic power-on after power loss, or enabling power failure recovery options.
  3. Implement data redundancy: Utilize RAID (Redundant Array of Independent Disks) or other data redundancy configurations to protect against data loss. This involves distributing data across multiple drives to ensure that if one drive fails, the data can be recovered from the remaining drives.
  4. Regularly backup data: Implement a backup strategy to regularly backup important data stored on the NAS device. This can be done by utilizing external storage devices, cloud backup services, or network backups to ensure data redundancy and protection.

By following these precautions, you can minimize the risk of data loss on your Lenovo ThinkSystem SR250 V2 NAS device caused by insufficient power supply or voltage fluctuations.

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

Although NAS ThinkSystem SR250 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 Lenovo ThinkSystem SR250 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.

Go to view
How to recover data from a Lenovo

How to recover data from a Lenovo

ThinkSystem SR250 V2 has 16 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 Lenovo ThinkSystem SR250 V2 network-attached storage keeps LifeLine 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 ThinkSystem SR250 V2, feel free to leave a comment!
  • Madison Attenborough
    Madison Attenborough 22.08.2023 10:50 #
    Is it possible to recover data from a NAS Lenovo ThinkSystem SR250 V2 device that has undergone a firmware update?
    • Hetman Software
      Hetman Software 22.08.2023 11:02 #

      Yes, it is possible to recover data from a NAS Lenovo ThinkSystem SR250 V2 device even after a firmware update. However, it depends on the specific circumstances and the type of data loss that occurred during the firmware update.

      If the firmware update process was interrupted or failed, resulting in data corruption or loss, it may be possible to recover the data by using specialized data recovery software or by seeking professional data recovery services. In such cases, it is important to avoid any further modifications to the NAS device to prevent overwriting the lost data.

      It is recommended to contact Lenovo support or consult with a professional data recovery service for assistance in recovering the data from the Lenovo ThinkSystem SR250 V2 device.

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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 is iSCSI and how does it work in the context of data storage and networking?

    iSCSI stands for Internet Small Computer System Interface. It is a protocol that allows SCSI (Small Computer System Interface) commands to be transmitted over an IP network, enabling remote storage devices to be accessed over a network connection.

    In the context of data storage and networking, iSCSI works by encapsulating SCSI commands and data into TCP/IP packets, which can then be transmitted over an Ethernet network. This allows storage devices, such as disk arrays or tape drives, to be connected to servers or clients over a network rather than using traditional direct-attached storage (DAS) methods.

    To establish an iSCSI connection, a client (initiator) sends an iSCSI request to a storage device (target) using the IP address or hostname of the target. The request is then routed through the network to the target storage device. The target receives the request, processes it, and sends a response back to the client.

    The iSCSI protocol allows for the use of IP networks, including local area networks (LANs), wide area networks (WANs), and the internet, to connect and access storage devices. This enables centralized storage management, easier scalability, and the ability to share storage resources among multiple servers or clients.

    Overall, iSCSI provides a flexible and cost-effective solution for storage networking, as it leverages existing IP infrastructure and eliminates the need for dedicated storage networks. It allows organizations to consolidate their storage resources, simplify management, and improve data accessibility and availability.

  • Can you provide an overview of the NAS Lenovo ThinkSystem SR250 V2 and its key features?

    The Lenovo ThinkSystem SR250 V2 is a versatile 1U rack server designed for small-to-medium-sized businesses (SMBs) and remote office/branch office (ROBO) environments. Here is an overview of its key features:

    1. Processor Options: The SR250 V2 supports a wide range of Intel Xeon E-2200 and E-2300 series processors, offering excellent performance and efficiency.
    2. Memory and Storage: It can accommodate up to 128GB of DDR4 memory, allowing for smooth multitasking and efficient data processing. The server also offers flexible storage options with support for up to 8 hot-swap 2.5-inch or 4 hot-swap 3.5-inch drives, enabling ample data storage.
    3. RAID Support: The SR250 V2 includes onboard hardware RAID support for enhanced data protection and reliability. It supports RAID 0, 1, 10, and 5 configurations, allowing for various levels of redundancy.
    4. Networking Capabilities: The server comes with multiple networking options, including Gigabit Ethernet and 10 Gigabit Ethernet ports. This enables high-speed data transfer and seamless connectivity for critical business applications.
    5. Scalability and Expansion: The SR250 V2 offers excellent scalability, allowing businesses to expand their infrastructure as needed. It provides multiple PCIe expansion slots, enabling the addition of various adapters and expansion cards for enhanced functionality.
    6. Management and Security: The server features Lenovo XClarity Controller, which provides easy-to-use management capabilities for monitoring and controlling server operations. It also includes built-in security features, such as TPM 2.0, to protect sensitive data and ensure system integrity.
    7. Energy Efficiency: The SR250 V2 is designed with energy efficiency in mind. It includes features like 80 PLUS Platinum or Titanium power supplies, dynamic fan control, and low-power processors, helping to reduce energy consumption and operational costs.

    Overall, the Lenovo ThinkSystem SR250 V2 is a reliable and cost-effective NAS solution, offering powerful performance, flexible storage options, and robust management capabilities for SMBs and ROBO environments.

  • Does the NAS Lenovo ThinkSystem SR250 V2 support the iSCSI protocol for storage connectivity? If yes, what are the benefits and capabilities of using iSCSI with this device?

    Yes, the Lenovo ThinkSystem SR250 V2 does support the iSCSI protocol for storage connectivity. iSCSI stands for Internet Small Computer System Interface, and it allows the server to connect to remote storage devices over a TCP/IP network.

    The benefits and capabilities of using iSCSI with the Lenovo ThinkSystem SR250 V2 include:

    1. Cost-effective: iSCSI enables the use of existing Ethernet infrastructure, eliminating the need for dedicated storage networks. This can result in cost savings compared to traditional Fibre Channel storage.
    2. Flexibility: iSCSI allows for flexible storage configurations. It supports both block-level and file-level storage, making it suitable for a wide range of applications and workloads.
    3. Scalability: With iSCSI, it is easy to scale storage capacity by adding additional drives or expanding existing storage arrays. This makes it a suitable choice for growing businesses or those with changing storage requirements.
    4. Performance: The ThinkSystem SR250 V2 supports high-speed Ethernet connections, which can provide excellent performance for iSCSI storage. With proper network configuration, iSCSI can deliver comparable performance to Fibre Channel.
    5. Compatibility: iSCSI is a widely adopted standard, ensuring compatibility with a variety of storage devices and software solutions. This allows for greater flexibility in choosing storage options and simplifies integration with existing infrastructure.

    Overall, using iSCSI with the Lenovo ThinkSystem SR250 V2 provides a cost-effective, flexible, and scalable storage solution with good performance and compatibility.

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