Step-by-Step Recovery of Faulty RAID Arrays in NAS Huawei OceanStor Pacific 9540

Has your NAS Huawei OceanStor Pacific 9540 suddenly lost its network drive and you’re unsure what to do next? Did the RAID array collapse, making your files inaccessible? Is the device throwing errors during startup? Perhaps you accidentally rebuilt the RAID array or several hard drives failed at the same time?

Step-by-Step Recovery of Faulty RAID Arrays in NAS Huawei OceanStor Pacific 9540

Huawei OceanStor Pacific 9540 NAS Data Recovery in 2025

In this step-by-step tutorial, we’ll show you how to rebuild your RAID and recover data from an OceanStor Pacific 9540. We’ll walk through the most common causes of failure and demonstrate proven methods to restore files from a lost or degraded RAID array.

Step-by-Step Recovery of Faulty RAID Arrays in NAS Huawei OceanStor Pacific 9540

RAID Recovery™ 2.8
Recover data from damaged RAID arrays inaccessible from a computer.
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Why Regular Data Recovery Tools Can’t Restore Files from RAID

Conventional hard drives store user data by writing it sequentially across the disk surface, which means an entire file is typically located on a single drive. In contrast, when data is written to a RAID array, each file is split into multiple fragments. These fragments are then distributed and written in sequence across all the drives in the array. Depending on the configuration, fragment sizes can range from 2 KB to 2 MB, so every file is physically stored across several disks at once.

This approach significantly increases read and write performance — after all, writing two halves of a 1 GB file to two drives simultaneously is much faster than writing the full 1 GB to a single disk. However, this same mechanism makes file recovery far more complex.

Different RAID levels use different methods to distribute and protect data. On top of that, manufacturers like Huawei often add their own proprietary structures and variations. As a result, data can be written to disks in many different formats, and each requires a specific approach during recovery.

What is a NAS Huawei OceanStor Pacific 9540 (Network Attached Storage) device?

The Huawei OceanStor Pacific 9540 is a Network Attached Storage (NAS) device developed by Huawei Technologies. It is designed to provide high-performance, scalable, and reliable storage solutions for enterprise-level data management.

The OceanStor Pacific 9540 NAS device offers a large capacity and supports both file and object storage. It is equipped with advanced features such as data deduplication, compression, and encryption to optimize storage efficiency and data security.

With its distributed architecture, the OceanStor Pacific 9540 allows for seamless scalability, enabling organizations to easily expand their storage capacity as their data needs grow. It also supports various protocols including NFS, SMB, and S3, making it compatible with a wide range of applications and environments.

Overall, the Huawei OceanStor Pacific 9540 NAS device is designed to meet the storage demands of modern enterprises, providing high-performance, reliable, and scalable storage solutions for efficient data management.

How to Remove Hard Disks from Your NAS and Connect Them to a PC

Although the NAS OceanStor Pacific 9540 can be accessed over the network, you still need to remove its hard disks and connect them directly to a Windows PC. Only then can the recovery software properly scan and analyze the drives. Follow these steps:

  1. Power off the NAS and disconnect it from the power source.

    WARNING! Before removing any drives, carefully read the device manual. Improper actions may damage both the NAS enclosure and the hard disks in the RAID array.

  2. Remove the hard disks one by one, gently sliding each drive out of its slot. Remember that hard disks are highly sensitive: any impact or drop can cause serious physical damage.

  3. Label each hard disk according to its position inside the NAS. The order of the drives is crucial for correct RAID reconstruction.

  4. Connect the drives to your computer. In this video, we explain which ports you can use to connect hard disks and what to do if your PC does not have enough free connectors.

    Go to view
    How to Order Remote Data Recovery

    How to Order Remote Data Recovery

Step-by-Step Data Recovery with Hetman RAID Recovery

Hetman Raid Recovery

This program restores data from damaged RAID arrays and is fully compatible with Huawei OceanStor Pacific 9540. Each hard disk in the array contains technical metadata describing how files were written. When launched, Hetman RAID Recovery analyzes this metadata, automatically reconstructs the damaged array, and provides access to its contents. After that, you can browse the recovered disk and save your files. The program can also restore files that were accidentally deleted from the network drive.

Go to view
How to recover data from a Huawei

How to recover data from a Huawei

OceanStor Pacific 9540 has 36 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;

How to Safely Recover Data from Disk Images

This utility allows you to create a complete copy of a disk and work with the disk image instead of the physical drive. This approach helps protect your data from:

  • Overwriting during the recovery process;
  • Additional data loss caused by bad sectors;
  • User errors.

To create a disk image, follow these steps:

  1. Ensure you have enough free space to store the image. Its size will typically match the size of the original disk.

  2. In the main window, select the target disk and choose Tools - Save Disk. You can also select multiple disks if needed.

  3. When the Image Creation Wizard opens, select whether you want to save the entire disk or only a specific region. Adjust the settings and click Next.

    Hetman RAID Recovery: Image Creation Wizard
  4. Choose the directory where the image will be saved. You may select any available disk connected to your PC or upload the image via FTP.

    Hetman RAID Recovery: Choose a disk or save the image via FTP

Where Are the User’s Files Actually Stored?

The Huawei OceanStor Pacific 9540 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.

RAID Recovery Software: Detailed Comparison

Product Operating system RAID controller support Supported file systems Virtual RAID controller support Data recovery from damaged RAID File preview
Hetman RAID Recovery Windows, Linux, MacOS Yes, over 100 controllers FAT, exFAT, NTFS, ReFS, APFS, HFS+, Ext4, Ext3, Ext2, ReiserFS, Btrfs, VMFS, Hikvision, XFS, UFS, ZFS Yes Yes Yes
DiskInternals RAID Recovery Windows Yes, over 10 controllers FAT, NTFS, Ext2/3/4, HFS+ No Yes Yes
R-Studio Windows, Mac, Linux Yes, over 20 controllers FAT, NTFS, Ext2/3/4, HFS+ Yes Yes Yes
UFS Explorer RAID Recovery Windows, Mac, Linux Yes, over 100 controllers FAT, NTFS, Ext2/3/4, HFS+ Yes Yes Yes
EaseUS Data Recovery Windows Yes, over 20 controllers FAT, NTFS, Ext2/3/4, HFS+ No Yes Yes
ReclaiMe Free RAID Recovery Windows Yes, over 100 controllers FAT, NTFS, Ext2/3/4, HFS+ Yes Yes Yes

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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 OceanStor Pacific 9540, feel free to leave a comment!
  • Jake Peel
    Jake Peel 26.08.2023 01:48 #
    What are the costs associated with data recovery from a NAS Huawei OceanStor Pacific 9540 device?
    • Hetman Software
      Hetman Software 26.08.2023 02:00 #

      The costs associated with data recovery from a Huawei OceanStor Pacific 9540 device can vary depending on several factors, including the severity of the data loss, the complexity of the recovery process, and the specific services required. However, here are some potential cost factors to consider:

      1. Evaluation Fee: Data recovery service providers may charge an evaluation fee to assess the extent of the data loss and determine if recovery is possible.
      2. Recovery Service Fee: The actual data recovery service fee can vary based on the complexity and time required for the recovery process. This fee may include labor costs, specialized tools, and expertise needed to recover the data.
      3. Replacement Hardware: In some cases, if the data loss is due to hardware failure, replacement parts or hardware may be required, which can add to the overall cost.
      4. Expedited Service: If you require urgent or expedited data recovery service, additional fees may apply.
      5. Additional Services: Depending on the specific situation, additional services such as forensic analysis, data extraction, or remote recovery may be necessary, which can incur additional costs.

      It is recommended to contact data recovery service providers directly to get a more accurate estimate of the costs associated with recovering data from a Huawei OceanStor Pacific 9540 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 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 Huawei OceanStor Pacific 9540 enhance the performance and scalability of a surveillance system compared to traditional storage solutions?

    The NAS Huawei OceanStor Pacific 9540 enhances the performance and scalability of a surveillance system compared to traditional storage solutions in several ways:

    1. High Performance: The OceanStor Pacific 9540 is designed to deliver high-performance storage capabilities specifically for video surveillance workloads. It supports high-speed data access, allowing for faster retrieval and analysis of video data. This ensures real-time monitoring and quick response times for critical surveillance applications.
    2. Scalability: The OceanStor Pacific 9540 offers exceptional scalability, allowing for easy expansion of storage capacity as the surveillance system grows. It supports massive storage capacities, enabling organizations to store and manage large volumes of video data over extended periods. This scalability eliminates the need for frequent storage upgrades, reducing costs and simplifying system management.
    3. Intelligent Data Management: The NAS solution incorporates intelligent data management features such as tiered storage and intelligent caching. These features optimize data placement based on access patterns and prioritize frequently accessed data for faster retrieval. This intelligent data management enhances system performance by reducing latency and improving overall efficiency.
    4. High Availability: The OceanStor Pacific 9540 ensures high availability of video surveillance data. It supports advanced RAID technologies, data replication, and snapshot capabilities, which provide data protection and minimize the risk of data loss. This ensures continuous access to video data, even in the event of hardware failures or system disruptions.
    5. Advanced Analytics: The OceanStor Pacific 9540 enables advanced analytics capabilities for video surveillance systems. It supports integration with AI algorithms and deep learning frameworks, allowing for real-time video analysis and intelligent video processing. This enhances the effectiveness of video surveillance by enabling proactive threat detection and automated event recognition.

    Overall, the OceanStor Pacific 9540 offers superior performance, scalability, data management, availability, and analytics capabilities compared to traditional storage solutions. It is specifically tailored to meet the demanding requirements of modern surveillance systems, ensuring optimal performance and efficiency.

  • What are the key features and capabilities of the NAS Huawei OceanStor Pacific 9540 that make it suitable for large-scale surveillance deployments?

    The Huawei OceanStor Pacific 9540 NAS (Network Attached Storage) has several key features and capabilities that make it suitable for large-scale surveillance deployments. These include:

    1. High scalability: The OceanStor Pacific 9540 supports up to 15 PB (Petabytes) of storage capacity, allowing for the storage of a massive amount of surveillance data. This scalability makes it ideal for large-scale surveillance deployments that generate a significant amount of video footage.
    2. High performance: The NAS is equipped with high-performance hardware components, including powerful processors and high-speed interfaces. This enables it to handle the demanding requirements of large-scale surveillance systems, such as real-time video streaming, video analysis, and data retrieval.
    3. High availability: The OceanStor Pacific 9540 incorporates advanced redundancy and fault-tolerant mechanisms to ensure high availability of data. It supports features like RAID (Redundant Array of Independent Disks) and erasure coding, which protect against data loss and ensure data integrity.
    4. Efficient data management: The NAS includes advanced data management features, such as data deduplication and compression. These technologies help reduce storage requirements and optimize storage utilization, making it more cost-effective for storing large amounts of surveillance data.
    5. Easy integration: The OceanStor Pacific 9540 is designed to seamlessly integrate with existing surveillance systems and applications. It supports industry-standard protocols like NFS (Network File System) and SMB (Server Message Block), allowing for easy integration into surveillance infrastructure.
    6. Scalable architecture: The NAS utilizes a distributed file system architecture, which enables it to scale horizontally by adding additional storage nodes. This scalability ensures that the storage capacity can be expanded as surveillance needs grow over time.
    7. Data protection and security: The OceanStor Pacific 9540 provides robust data protection and security features. It supports data encryption, access control mechanisms, and data backup solutions, ensuring the confidentiality and integrity of surveillance data.

    Overall, the key features and capabilities of the Huawei OceanStor Pacific 9540 NAS make it a suitable choice for large-scale surveillance deployments, offering high scalability, performance, availability, and efficient data management.

  • How does the NAS Huawei OceanStor Pacific 9540 ensure data security and reliability in a surveillance system, especially in high-demand scenarios with large amounts of video footage?

    The NAS Huawei OceanStor Pacific 9540 ensures data security and reliability in a surveillance system, even in high-demand scenarios with large amounts of video footage, through several key features:

    1. Data Encryption: The OceanStor Pacific 9540 supports various encryption algorithms, including AES and SM4, to protect data at rest and in transit. This ensures that video footage remains secure, even if the storage devices are compromised.
    2. Erasure Coding: The system utilizes erasure coding technology to protect against data loss. It divides data into multiple fragments, adds parity data, and distributes them across different drives or nodes. This enables the system to withstand multiple drive failures without losing any data.
    3. High Availability: The OceanStor Pacific 9540 supports active-active clustering, where multiple nodes work together to provide continuous access to data. In case of a node failure, the system automatically switches to another node, ensuring uninterrupted surveillance operations.
    4. RAID Protection: The system supports various RAID levels, such as RAID 1, RAID 5, and RAID 6, to protect against drive failures. This redundancy ensures that video footage remains accessible even if one or more drives fail.
    5. Data Integrity Check: The OceanStor Pacific 9540 performs regular data integrity checks to identify and correct any inconsistencies or errors in the stored video footage. This helps maintain the reliability and accuracy of the surveillance data.
    6. Scalability: The system is designed to scale seamlessly as the surveillance system grows. It supports the addition of more storage nodes or expansion units, allowing for increased capacity and performance without compromising data security or reliability.
    7. Data Deduplication and Compression: The OceanStor Pacific 9540 employs data deduplication and compression techniques to optimize storage utilization. This reduces the amount of storage space required for storing video footage, allowing for cost-effective storage while maintaining data integrity.

    Overall, the NAS Huawei OceanStor Pacific 9540 combines advanced security features, data protection mechanisms, and scalability to ensure data security and reliability in high-demand surveillance scenarios with large amounts of video footage.