NAS Synology DiskStation DS713+ RAID Arrays: Data Recovery Tips Following Natural Component Wear

Contents

• Why Regular Data Recovery Tools Can’t Restore Files from RAID
• Key Information About the NAS Synology DiskStation DS713+
• How to Remove Hard Disks from Your NAS and Connect Them to a PC
  • Step-by-Step Data Recovery with Hetman RAID Recovery
  • How to Safely Recover Data from Disk Images
  • Where Are the User’s Files Actually Stored?
  • RAID Recovery Software: Detailed Comparison

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 Synology 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.

How can conducting regular backups on external storage devices mitigate data loss risks for NAS Synology DiskStation DS713+ devices?

Conducting regular backups on external storage devices can mitigate data loss risks for NAS Synology DiskStation DS713+ devices in the following ways:

1. Redundancy: By regularly backing up your data on external storage devices, you create a redundant copy of your important files. In case of any data loss or hardware failure on the NAS device, you can restore the data from the external backup, ensuring minimal or no loss of data.
2. Protection against hardware failure: NAS devices can experience hardware failures, such as disk failures or power supply issues. By having regular backups on external storage devices, you can protect your data from such failures. If the NAS device encounters hardware problems, you can replace or repair it while still having access to your data through the external backup.
3. Protection against accidental deletion or user errors: Human errors can lead to accidental deletion or modification of data. With regular backups on external storage devices, you can recover the previous versions of files or restore deleted files from the backup, reducing the impact of user errors.
4. Disaster recovery: In case of a catastrophic event like fire, flood, or theft, having backups stored on external devices ensures that your data remains safe. By storing backups off-site, you can easily recover your data in the event of a disaster.
5. Version control and file history: Some backup solutions offer version control and file history features. This allows you to keep multiple versions of files and restore them to a specific point in time. In case of data corruption or accidental modifications, you can retrieve the desired version from the backup.
6. Data migration and system upgrades: Regular backups on external storage devices can also assist in data migration or system upgrades. When upgrading your NAS device or migrating to a new one, you can easily transfer the data from the backup to the new system, ensuring a seamless transition without any data loss.

It is important to regularly test the backups to ensure their integrity and verify that the restore process works correctly. Additionally, following the 3-2-1 backup strategy (having at least three copies of your data, stored on two different media, with one copy off-site) can provide an extra layer of protection against data loss risks.

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

Although the NAS DiskStation DS713+ 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.

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   How to Order Remote Data Recovery

Step-by-Step Data Recovery with Hetman RAID Recovery

This program restores data from damaged RAID arrays and is fully compatible with Synology DiskStation DS713+. 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.

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How to recover data from a Synology

DiskStation DS713+ has 2 HDD slots, and it supports the following array types:

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

NAS supports:

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

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.

   

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.

   

Where Are the User’s Files Actually Stored?

The Synology DiskStation DS713+ 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.

RAID Recovery Software: Detailed Comparison