How to recover data from Lenovo ThinkSystem SR850 V2 Mission-Critical Server 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 Retrieve Lost Data from Your NAS Lenovo ThinkSystem SR850 V2 Mission-Critical Server Device

Lenovo ThinkSystem SR850 V2 Mission-Critical Server 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 SR850 V2 Mission-Critical Server.

How to Retrieve Lost Data from Your NAS Lenovo ThinkSystem SR850 V2 Mission-Critical Server Device

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.

Are there any recommended practices for off-site backup storage to prevent complete data loss in the event of a disaster?

Yes, there are several recommended practices for off-site backup storage to prevent complete data loss in the event of a disaster. Here are some of them:

  1. Choose a geographically distant location: Select an off-site backup storage location that is far enough from your primary site to minimize the risk of being affected by the same disaster. This helps ensure that your backup data remains safe even if your primary site is completely destroyed.
  2. Use a secure and reliable data center: Partner with a reputable data center or cloud storage provider that offers high levels of security, redundancy, and reliability. Look for providers with certifications like ISO 27001 or SSAE 16, and ensure they have robust physical and logical security measures in place.
  3. Implement encryption: Encrypt your backup data before storing it off-site. This adds an extra layer of protection, ensuring that even if your data is compromised, it cannot be accessed without the encryption key.
  4. Regularly test and verify backups: Regularly test your backup and recovery processes to ensure they are working as expected. Perform periodic restoration tests to validate the integrity and accessibility of your backup data.
  5. Implement a multi-tiered backup strategy: Consider implementing a multi-tiered backup strategy that includes both on-site and off-site backups. This can include local backups for quick recovery and off-site backups for protection against site-wide disasters.
  6. Automate backup processes: Use automated backup solutions to ensure that your data is regularly and consistently backed up to the off-site location. Automation reduces the risk of human error and ensures that backups are performed on schedule.
  7. Implement versioning and retention policies: Implement versioning and retention policies for your backups. This allows you to store multiple versions of your data and retain backups for a specified period. In case of data corruption or accidental deletion, you can restore a clean version of the data from an earlier backup.
  8. Regularly review and update your backup strategy: Periodically review and update your backup strategy to ensure it aligns with your changing business needs and technology advancements. Regularly assess the effectiveness of your off-site backup storage solution and make adjustments as necessary.

Remember, the specific practices may vary depending on your organization's requirements, industry regulations, and the type of data being backed up. It's always recommended to consult with IT professionals or data management experts to design a backup strategy that suits your specific needs.

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

Although NAS ThinkSystem SR850 V2 Mission-Critical Server 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 SR850 V2 Mission-Critical Server. 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 SR850 V2 Mission-Critical Server has 24 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 SR850 V2 Mission-Critical Server 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 SR850 V2 Mission-Critical Server, feel free to leave a comment!
  • Herman Hutchinson
    Herman Hutchinson 22.08.2023 04:56 #
    Can data recovery from a NAS Lenovo ThinkSystem SR850 V2 Mission-Critical Server device be performed if there are issues with the network router or switch?
    • Hetman Software
      Hetman Software 22.08.2023 05:00 #

      Yes, data recovery from a NAS (Network Attached Storage) device like the Lenovo ThinkSystem SR850 V2 can be performed even if there are issues with the network router or switch.

      The NAS device itself stores the data on its internal storage drives, and it is independent of the network infrastructure. If there are issues with the router or switch, it may result in a temporary loss of network connectivity, but the data stored on the NAS should still be intact.

      To perform data recovery from the NAS device, you would need to physically access the device and connect it directly to a computer or another network device using Ethernet or other supported connectivity options. This way, you can bypass the problematic router or switch and access the data directly from the NAS.

      However, if the issues with the network infrastructure have caused data corruption or other problems on the NAS device itself, data recovery may become more complex. In such cases, it is recommended to consult with a professional data recovery service to ensure the best chances of recovering your data successfully.

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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 network protocols supported by the NAS Lenovo ThinkSystem SR850 V2 Mission-Critical Server?

    The Lenovo ThinkSystem SR850 V2 Mission-Critical Server supports the following network protocols:

    1. Ethernet (IEEE 802.3)
    2. Fast Ethernet (IEEE 802.3u)
    3. Gigabit Ethernet (IEEE 802.3ab)
    4. 10 Gigabit Ethernet (IEEE 802.3ae)
    5. 25 Gigabit Ethernet (IEEE 802.3by)
    6. 40 Gigabit Ethernet (IEEE 802.3ba)
    7. 100 Gigabit Ethernet (IEEE 802.3bm)
    8. InfiniBand (IBTA 1.2.1)
    9. Fibre Channel (FCP-2)
    10. iSCSI (RFC 3720)
    11. Network File System (NFS)
    12. Server Message Block (SMB)
    13. Common Internet File System (CIFS)
    14. File Transfer Protocol (FTP)
    15. Secure Shell (SSH)
    16. Simple Network Management Protocol (SNMP)
    17. Internet Protocol (IP)
    18. Transmission Control Protocol (TCP)
    19. User Datagram Protocol (UDP)
    20. Internet Control Message Protocol (ICMP)
    21. Dynamic Host Configuration Protocol (DHCP)
    22. Domain Name System (DNS)
    23. Lightweight Directory Access Protocol (LDAP)
    24. Simple Mail Transfer Protocol (SMTP)
    25. Post Office Protocol (POP3)
    26. Internet Message Access Protocol (IMAP)
    27. Hypertext Transfer Protocol (HTTP)
    28. Secure Sockets Layer (SSL)
    29. Transport Layer Security (TLS)
    30. Virtual Extensible LAN (VXLAN)
    31. Border Gateway Protocol (BGP)
    32. Open Shortest Path First (OSPF)
    33. Enhanced Interior Gateway Routing Protocol (EIGRP)
    34. Routing Information Protocol (RIP)
    35. Virtual Router Redundancy Protocol (VRRP)
    36. Internet Group Management Protocol (IGMP)
    37. Spanning Tree Protocol (STP)
    38. Rapid Spanning Tree Protocol (RSTP)
    39. Multiple Spanning Tree Protocol (MSTP)
    40. Link Aggregation Control Protocol (LACP)
    41. Virtual Router Redundancy Protocol (VRRP)
    42. Hot Standby Router Protocol (HSRP)
    43. Dynamic Trunking Protocol (DTP)
    44. VLAN Trunking Protocol (VTP)
    45. Internet Small Computer System Interface (iSCSI)
    46. Fibre Channel over Ethernet (FCoE)
    47. Fibre Channel over IP (FCIP)
    48. Remote Direct Memory Access (RDMA)
    49. Internet Protocol Security (IPsec)
    50. Secure Shell (SSH)
    51. Secure File Transfer Protocol (SFTP)
    52. Network Time Protocol (NTP)
    53. Simple Network Time Protocol (SNTP)
    54. Dynamic Host Configuration Protocol (DHCP)
    55. Domain Name System (DNS)
    56. Lightweight Directory Access Protocol (LDAP)
    57. Simple Mail Transfer Protocol (SMTP)
    58. Post Office Protocol (POP3)
    59. Internet Message Access Protocol (IMAP)
    60. Hypertext Transfer Protocol (HTTP)
    61. Secure Sockets Layer (SSL)
    62. Transport Layer Security (TLS)
    63. Remote Desktop Protocol (RDP)
    64. Virtual Network Computing (VNC)
    65. Simple Network Management Protocol (SNMP)
    66. Remote Shell (rsh)
    67. Remote Copy (rcp)
    68. Remote File Transfer Protocol (RFTP)
    69. Network File System (NFS)
    70. Server Message Block (SMB)
    71. Common Internet File System (CIFS)
    72. File Transfer Protocol (FTP)
    73. Trivial File Transfer Protocol (TFTP)
    74. Network News Transfer Protocol (NNTP)
    75. Lightweight Directory Access Protocol (LDAP)
    76. Simple Object Access Protocol (SOAP)
    77. Web Services Description Language (WSDL)
    78. Simple Mail Transfer Protocol (SMTP)
    79. Post Office Protocol (POP3)
    80. Internet Message Access Protocol (IMAP)
    81. Hypertext Transfer Protocol (HTTP)
    82. Secure Sockets Layer (SSL)
    83. Transport Layer Security (TLS)
    84. Remote Procedure Call (RPC)
    85. Lightweight Directory Access Protocol (LDAP)
    86. Simple Object Access Protocol (SOAP)
    87. Web Services Description Language (WSDL)
    88. Simple Mail Transfer Protocol (SMTP)
    89. Post Office Protocol (POP3)
    90. Internet Message Access Protocol (IMAP)
    91. Hypertext Transfer Protocol (HTTP)
    92. Secure Sockets Layer (SSL)
    93. Transport Layer Security (TLS)
  • How do the network protocols utilized by the NAS Lenovo ThinkSystem SR850 V2 Mission-Critical Server ensure efficient data transfer and communication?

    The network protocols utilized by the NAS Lenovo ThinkSystem SR850 V2 Mission-Critical Server ensure efficient data transfer and communication through several mechanisms:

    1. TCP/IP Protocol Suite: The server utilizes the Transmission Control Protocol/Internet Protocol (TCP/IP) suite, which is a widely adopted set of protocols for network communication. TCP provides reliable, connection-oriented communication, ensuring that data packets are delivered in the correct order and without errors. IP enables the routing of packets across networks.
    2. Ethernet: The server supports high-speed Ethernet connectivity, typically using 10GbE or higher network adapters. Ethernet provides a standardized and widely supported interface for data transfer, ensuring compatibility with various networking devices.
    3. Jumbo Frames: The server supports Jumbo Frames, which allow for larger data packets to be transferred in a single transmission. This reduces the overhead associated with packet headers and improves the efficiency of data transfer, especially for large file transfers or data-intensive applications.
    4. Quality of Service (QoS): The server implements QoS mechanisms to prioritize network traffic based on specific criteria. This ensures that critical data, such as real-time streaming or mission-critical applications, receive higher priority and bandwidth allocation, while less critical traffic is given lower priority. QoS helps to optimize network performance and ensure efficient communication.
    5. Network Offloading: The server may include hardware offloading capabilities, such as TCP/IP offload engines (TOE) or network interface card (NIC) offloading. These offloading techniques shift some processing tasks from the server's CPU to dedicated hardware, reducing CPU utilization and improving overall network performance.
    6. Network Redundancy: The server may support network redundancy features, such as link aggregation (bonding) or network teaming. These features enable the server to utilize multiple network interfaces simultaneously, providing higher bandwidth and redundancy. In case of a network failure, the server can seamlessly switch to an alternate network path, ensuring continuous data transfer and communication.

    Overall, the combination of these network protocols and features in the NAS Lenovo ThinkSystem SR850 V2 Mission-Critical Server ensures efficient data transfer, reliable communication, and optimized network performance for mission-critical applications.

  • Are there any specific network protocol requirements or recommendations for optimal performance when using the NAS Lenovo ThinkSystem SR850 V2 Mission-Critical Server?

    The Lenovo ThinkSystem SR850 V2 Mission-Critical Server is a hardware device and does not have specific network protocol requirements or recommendations for optimal performance. However, the server is designed to work with standard networking protocols and can be connected to a network using Ethernet interfaces.

    To ensure optimal performance when using the server, it is recommended to follow general best practices for network configuration and performance optimization. Some recommendations include:

    1. Use high-quality networking equipment: Ensure that the network switches, routers, and cables used are of high quality and capable of handling the required bandwidth and traffic.
    2. Use Gigabit or higher-speed Ethernet connections: The server supports Gigabit Ethernet interfaces, but if higher network speeds are required, consider using 10 Gigabit or faster Ethernet connections.
    3. Implement network redundancy: Configure redundant network connections to ensure high availability and failover in case of network failures. This can be achieved using technologies like link aggregation (LACP) or network bonding.
    4. Optimize network settings: Adjust network settings like MTU (Maximum Transmission Unit) size, TCP/IP settings, and flow control to match the requirements of your network environment.
    5. Enable jumbo frames: If your network infrastructure supports jumbo frames, enabling this feature can improve network performance by reducing the overhead associated with smaller packet sizes.
    6. Use VLANs for network segmentation: If you need to segregate network traffic for security or performance reasons, consider implementing VLANs (Virtual Local Area Networks) to separate different types of traffic.
    7. Monitor network performance: Regularly monitor network performance using tools like network monitoring software or built-in server management tools to identify and troubleshoot any network-related issues.

    It is important to consult the official documentation provided by Lenovo for the specific server model and firmware version you are using, as they may provide additional recommendations or considerations for optimal network performance.

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