Understanding NAS Synology RackStation RS2211RP+ / RS2211+ RAID Controller Failure: Causes, Recovery Approaches, and Consequences

RAID controller failure on ⭐ NAS: causes, consequences, and the best practices for data recovery.

Understanding NAS Synology RackStation RS2211RP+ / RS2211+ RAID Controller Failure: Causes, Recovery Approaches, and Consequences

Synology RackStation RS2211RP+ / RS2211+ NAS Data Recovery in 2024

In this step-by-step tutorial, we’ll show you how to rebuild your RAID and recover data from RackStation RS2211RP+ / RS2211+.

Understanding NAS Synology RackStation RS2211RP+ / RS2211+ RAID Controller Failure: Causes, Recovery Approaches, and Consequences

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.

Can the type of file system used on NAS Synology RackStation RS2211RP+ / RS2211+ devices affect data loss risks?

Yes, the type of file system used on NAS devices like the Synology RackStation RS2211RP+ / RS2211+ can affect data loss risks. The file system is responsible for organizing and managing the data stored on the NAS, and different file systems have varying levels of reliability and data protection features.

Some common file systems used on NAS devices include:

  1. EXT4: This is a widely used file system known for its stability and data protection features. It supports journaling, which helps recover data in case of power outages or system crashes. It also has built-in data checksums to detect and correct errors.
  2. Btrfs: This is a modern file system that offers advanced features like snapshots, data deduplication, and data integrity checks. Btrfs can help protect against data loss by allowing users to revert to previous versions of files and by automatically detecting and repairing corrupted data.
  3. ZFS: This is another advanced file system that provides data integrity through its checksumming mechanism. ZFS also offers features like snapshots, data compression, and RAID-Z, which can enhance data protection and recovery capabilities.

The choice of file system can impact data loss risks in several ways. A more robust file system with features like journaling, checksums, and snapshots can help protect against data corruption, accidental deletions, and other data loss scenarios. It can also provide better recovery options in case of hardware failures or software issues.

However, it's important to note that while the file system plays a significant role in data protection, it is not the sole factor. Proper backup strategies, redundant storage configurations, and regular maintenance are also crucial to minimize data loss risks on NAS devices.

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

Although NAS RackStation RS2211RP+ / RS2211+ 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 RackStation RS2211RP+ / RS2211+. 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

RackStation RS2211RP+ / RS2211+ has 10 HDD slots, and it supports the following array types:

  • Synology Hybrid RAID (SHR);
  • RAID 6;
  • RAID 5;
  • RAID 10;
  • RAID 1;
  • RAID 0;
  • Basic;
  • JBOD;

NAS supports:

  • Btrfs;
  • EXT4;
  • EXT3 (External Disk Only);
  • FAT32 (External Disk Only);
  • exFAT (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 RackStation RS2211RP+ / RS2211+ 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 RackStation RS2211RP+ / RS2211+, 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 key considerations when selecting an additional hard drive for the Synology RackStation RS2211RP+ / RS2211+ NAS?

    When selecting an additional hard drive for the Synology RackStation RS2211RP+ / RS2211+ NAS, there are several key considerations to keep in mind:

    1. Compatibility: Ensure that the hard drive you choose is compatible with the NAS model. Check the manufacturer's website or product documentation for a list of supported drives.
    2. Capacity: Determine the storage capacity you require based on your needs. Consider factors such as the amount of data you need to store, future growth, and redundancy requirements.
    3. Drive Type: Choose between traditional hard disk drives (HDDs) or solid-state drives (SSDs). HDDs provide higher storage capacity at a lower cost, while SSDs offer faster performance and lower power consumption.
    4. RAID Configuration: Consider the RAID configuration you plan to use. The RS2211RP+ / RS2211+ supports various RAID levels, such as RAID 0, 1, 5, 6, 10, and JBOD. Ensure that the selected hard drive is compatible with your desired RAID configuration.
    5. Drive Speed: Look for drives with higher rotational speeds (RPM) for faster data access and transfer rates. 7200 RPM drives are commonly used for NAS systems.
    6. Cache Size: Consider the cache size of the hard drive, as it can affect the overall performance of the NAS. Larger cache sizes can help improve read and write speeds.
    7. Reliability: Choose hard drives from reputable manufacturers known for their reliability and durability. Look for features like vibration and shock resistance, as NAS systems can experience higher workload demands.
    8. Warranty: Check the warranty period offered by the hard drive manufacturer. Longer warranties indicate confidence in the drive's reliability and can provide peace of mind.
    9. Budget: Consider your budget for the additional hard drive. While it's important to find a drive that meets your requirements, be mindful of cost and value for money.
    10. Scalability: If you plan to expand your storage capacity in the future, consider drives that are part of the same product line or series, ensuring compatibility and ease of expansion.

    It is recommended to consult the Synology website, product documentation, or reach out to their support team for specific recommendations and guidelines for the RS2211RP+ / RS2211+ NAS model.

  • How do you properly install and configure an additional hard drive in the Synology RackStation RS2211RP+ / RS2211+ NAS?

    To properly install and configure an additional hard drive in the Synology RackStation RS2211RP+ / RS2211+ NAS, follow these steps:

    1. Power off the NAS and disconnect all cables.
    2. Remove the NAS from the rack and open the top cover.
    3. Locate the empty drive bay where you want to install the additional hard drive.
    4. Remove the drive tray from the bay by pulling the handle.
    5. Attach the additional hard drive to the drive tray using the provided screws.
    6. Slide the drive tray with the hard drive back into the empty bay until it clicks into place.
    7. Repeat the above steps for each additional hard drive you want to install.
    8. Close the top cover and place the NAS back into the rack.
    9. Reconnect all cables to the NAS.
    10. Power on the NAS and wait for it to fully boot up.

    Once the additional hard drive(s) are physically installed, you need to configure them in the NAS operating system (DSM). Here's how:

    1. Access the DSM interface by entering the NAS IP address in a web browser.
    2. Log in with your admin credentials.
    3. In the DSM interface, go to "Storage Manager" from the main menu.
    4. Click on "Storage" and then "Disk Group".
    5. Click "Create" to create a new disk group.
    6. Select the additional hard drive(s) you installed and click "Next".
    7. Choose the RAID type you want to use for the disk group (e.g., RAID 1, RAID 5, etc.).
    8. Configure any additional settings like disk allocation, file system, and volume label.
    9. Review the summary and click "Apply" to create the disk group.
    10. Once the disk group is created, you can create volumes and shared folders on it as needed.

    Make sure to follow any specific instructions or recommendations provided by Synology in their official documentation or user manual for your specific model.

  • What are the recommended hard drive models and specifications for optimal performance and compatibility with the Synology RackStation RS2211RP+ / RS2211+ NAS?

    The Synology RackStation RS2211RP+ / RS2211+ NAS supports both 2.5" and 3.5" SATA hard drives. Here are the recommended hard drive models and specifications for optimal performance and compatibility:

    1. Seagate IronWolf Pro: These hard drives are specifically designed for NAS systems and offer high performance, reliability, and scalability. They come in various capacities ranging from 2TB to 18TB.
    2. Western Digital Red Pro: Another popular choice for NAS systems, the WD Red Pro drives offer excellent performance and reliability. They are available in capacities ranging from 2TB to 14TB.
    3. Toshiba N300: The N300 series from Toshiba is designed for NAS applications and offers high performance and durability. They come in capacities up to 14TB.
    4. HGST Ultrastar: These enterprise-grade hard drives are known for their reliability and performance. They are available in capacities up to 18TB.

    When selecting hard drives for your Synology RackStation RS2211RP+ / RS2211+ NAS, make sure to consider the capacity you need, the required speed (RPM), and the intended usage (such as data storage, backup, or multimedia streaming). It is also recommended to use hard drives from the same manufacturer and series to ensure compatibility and optimal performance.

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