NAS Synology DiskStation DS215+ / DS215j RAID Arrays: Data Recovery Methods After Natural Component Wear

Natural component wear in ⭐ NAS RAID arrays can lead to data loss. Here’s how to recover.

NAS Synology DiskStation DS215+ / DS215j RAID Arrays: Data Recovery Methods After Natural Component Wear

Synology DiskStation DS215+ / DS215j NAS Data Recovery in 2024

In this step-by-step tutorial, we’ll show you how to rebuild your RAID and recover data from DiskStation DS215+ / DS215j.

NAS Synology DiskStation DS215+ / DS215j RAID Arrays: Data Recovery Methods After Natural Component Wear

RAID Recovery™ 2.6
Recover data from damaged RAID arrays inaccessible from a computer.
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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 Synology 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 specific precautions to take while migrating data between NAS Synology DiskStation DS215+ / DS215j devices?

Yes, there are a few precautions you should take while migrating data between NAS Synology DiskStation DS215+ / DS215j devices. Here are some important steps to follow:

  1. Backup your data: Before starting the migration process, it is crucial to create a backup of all your important data. This ensures that even if something goes wrong during the migration, your data remains safe.
  2. Check compatibility: Ensure that the Synology DiskStation DS215+ / DS215j devices are compatible with each other for data migration. Check the product specifications and compatibility lists provided by Synology to ensure a smooth migration process.
  3. Update firmware: Make sure that both the source and destination DiskStations are running the latest firmware versions. Updating the firmware helps in resolving any known issues and ensures compatibility during the migration process.
  4. Plan the migration process: Create a detailed plan for the migration process, including the order of data transfer, any specific settings that need to be configured, and the estimated downtime, if any. This helps in minimizing any potential disruptions during the migration.
  5. Use the Data Migration Assistant: Synology provides a Data Migration Assistant tool that simplifies the process of transferring data between DiskStation devices. This tool ensures a smooth and efficient migration process.
  6. Test the migration process: Before migrating all your data, it is recommended to perform a test migration with a small amount of data. This helps in identifying any issues or errors that may arise during the migration process and allows you to rectify them before migrating the entire dataset.
  7. Monitor the migration: Keep a close eye on the migration process to ensure that it is progressing smoothly. Monitor the transfer speed, any error messages, and the overall progress to identify and resolve any issues promptly.
  8. Verify the migrated data: Once the migration is complete, verify the integrity and accessibility of the migrated data. Check if all the files and folders are intact and accessible on the new DiskStation.

By following these precautions, you can minimize the risk of data loss or corruption during the migration process and ensure a successful transfer of data between NAS Synology DiskStation DS215+ / DS215j devices.

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

Although NAS DiskStation DS215+ / DS215j 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 Synology DiskStation DS215+ / DS215j. 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 Synology

How to recover data from a Synology

DiskStation DS215+ / DS215j has 2 HDD slots, and it supports the following array types:

  • Synology Hybrid RAID;
  • RAID 1;
  • RAID 0;
  • Basic;
  • JBOD;

NAS supports:

  • EXT4;
  • EXT3 (External Disk Only);
  • FAT32 (External Disk Only);
  • NTFS (External Disk Only);
  • HFS+ (External Disk Read Only);

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 Synology DiskStation DS215+ / DS215j network-attached storage keeps DSM (DiskStation Manager) 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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  • 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 DiskStation DS215+ / DS215j, feel free to leave a comment!
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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

  • What are the advantages of regularly updating the software on a NAS Synology DiskStation DS215+ / DS215j?

    Regularly updating the software on a NAS Synology DiskStation DS215+ / DS215j offers several advantages:

    1. Security: Software updates often include patches and fixes for vulnerabilities that could be exploited by hackers. By keeping your NAS software up to date, you ensure that your data remains secure and protected from potential threats.
    2. Stability: Updates also include bug fixes and performance enhancements that can improve the overall stability and reliability of your NAS. This can help prevent crashes, errors, and other issues that may impact the functionality of your device.
    3. New Features: Software updates often introduce new features and functionalities that enhance the capabilities of your NAS. These updates can provide access to new applications, services, and tools that can improve your productivity and expand the functionality of your device.
    4. Compatibility: Updates ensure that your NAS remains compatible with the latest hardware, software, and protocols. This is particularly important as technology evolves and new devices and systems are introduced. By staying up to date, you can ensure seamless integration and compatibility with other devices on your network.
    5. Performance Optimization: Software updates may include performance optimizations that can improve the speed, responsiveness, and overall performance of your NAS. These optimizations can help streamline operations, reduce latency, and enhance the overall user experience.
    6. Support: Regularly updating your NAS software ensures that you have access to the latest support and assistance from the manufacturer. If you encounter any issues or require technical assistance, having the latest software version installed can help facilitate troubleshooting and resolution.

    Overall, regularly updating the software on your NAS Synology DiskStation DS215+ / DS215j is crucial to ensure security, stability, compatibility, and performance optimization. It also allows you to benefit from new features and functionalities introduced by the manufacturer.

  • How can I check for and install software updates on my NAS Synology DiskStation DS215+ / DS215j?

    To check for and install software updates on your Synology DiskStation DS215+ or DS215j NAS, follow these steps:

    1. Open a web browser on your computer and enter the IP address of your NAS in the address bar. The IP address can be found using the Synology Assistant software or by checking your router's connected devices list.
    2. Log in to the DiskStation Manager (DSM) interface using your admin username and password.
    3. Once logged in, click on "Control Panel" in the main menu.
    4. In the Control Panel, select "Update & Restore" or "Update & Restore > DSM Update" depending on the version of DSM you are using.
    5. In the "Update & Restore" section, click on the "Check DSM Updates" button. This will check for the latest DSM software updates available for your NAS.
    6. If an update is available, you will see a notification indicating the availability of the update. Click on the "Download" button to start downloading the update file.
    7. After the download is complete, click on the "Install Now" button to begin the installation process. Follow the on-screen instructions to complete the installation.

    Note: During the installation process, your NAS may reboot, and you may temporarily lose access to the DSM interface. This is normal and should not cause any data loss.

    1. Once the installation is complete, you will be prompted to log in again. After logging in, you can verify the successful update by checking the DSM version displayed in the DSM interface.

    It is recommended to regularly check for and install software updates on your NAS to ensure optimal performance, security, and access to new features.

  • Are there any specific precautions or best practices to follow when updating the software on a NAS Synology DiskStation DS215+ / DS215j to ensure a smooth and successful update process?

    Yes, there are a few precautions and best practices to follow when updating the software on a Synology DiskStation DS215+ / DS215j NAS:

    1. Backup your data: Before performing any software update, it is essential to backup all your important data. This ensures that even if something goes wrong during the update process, your data remains safe.
    2. Check system requirements: Make sure that your NAS meets the system requirements for the new software version. Check the Synology website or release notes for the specific requirements.
    3. Read the release notes: Before updating, carefully read the release notes for the new software version. This will provide you with important information about the update process, new features, and any known issues or limitations.
    4. Check compatibility: Ensure that all third-party applications or packages installed on your NAS are compatible with the new software version. Some applications may require updates or may not be compatible at all.
    5. Update packages and applications: Before updating the NAS firmware, it is recommended to update all installed packages and applications to their latest versions. This helps ensure compatibility and stability.
    6. Disable or pause services: To avoid any conflicts or interruptions during the update process, it is advisable to disable or pause any non-essential services running on your NAS. This includes applications, file services, media servers, etc.
    7. Use wired network connection: It is recommended to use a wired network connection instead of a wireless connection for the update process. This ensures a more stable and reliable connection, reducing the chances of any interruptions during the update.
    8. Use UPS (Uninterruptible Power Supply): If possible, connect your NAS to an Uninterruptible Power Supply (UPS) to protect it from power outages or fluctuations during the update process. Sudden power loss can lead to firmware corruption or other issues.
    9. Update during non-peak hours: To minimize the impact on your NAS performance and user experience, schedule the update during non-peak hours when the NAS is not heavily used.
    10. Follow the official update process: Always follow the official update process provided by Synology. This typically involves logging into the DSM (DiskStation Manager) web interface, checking for updates, and following the on-screen instructions.

    By following these precautions and best practices, you can help ensure a smooth and successful update process for your Synology DiskStation DS215+ / DS215j NAS.

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