- Why Regular Data Recovery Tools Can’t Restore Files from RAID
- Key Information About the NAS Digiever DS-8588-SRM Pro+
- How to Remove Hard Disks from Your NAS and Connect Them to a PC
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 Digiever 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 quality of service (QoS) settings impact data transfer reliability on NAS Digiever DS-8588-SRM Pro+ devices?
Quality of Service (QoS) settings can impact data transfer reliability on NAS Digiever DS-8588-SRM Pro+ devices in the following ways:
- Bandwidth allocation: QoS settings allow you to allocate specific amounts of bandwidth to different applications or services. By prioritizing data transfer applications, you can ensure that they receive sufficient bandwidth for reliable and uninterrupted data transfer.
- Traffic prioritization: QoS settings enable you to prioritize certain types of traffic over others. For example, you can prioritize data transfer traffic over web browsing or streaming services. This ensures that data transfer gets higher priority, reducing the chances of interruptions or delays.
- Traffic shaping: QoS settings can shape the traffic flow by limiting or controlling the amount of data transferred at a given time. By setting limits and controlling the flow, you can prevent congestion and ensure a smooth and reliable data transfer experience.
- Latency control: QoS settings can help control the latency or delay in data transfer. By prioritizing time-sensitive data transfer applications, you can reduce latency and improve the reliability of transferring time-critical data.
- Packet prioritization: QoS settings allow you to prioritize certain types of packets over others. For example, you can prioritize small data packets over large ones, ensuring that critical data is transferred first. This prioritization can improve the reliability of data transfer by reducing the chances of packet loss or corruption.
By properly configuring and optimizing QoS settings on NAS Digiever DS-8588-SRM Pro+ devices, you can improve the reliability and performance of data transfers, ensuring smooth and uninterrupted data flow.
How to Remove Hard Disks from Your NAS and Connect Them to a PC
Although the NAS DS-8588-SRM Pro+ 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:
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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.
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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.
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Label each hard disk according to its position inside the NAS. The order of the drives is crucial for correct RAID reconstruction.
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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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Step-by-Step Data Recovery with Hetman RAID Recovery
This program restores data from damaged RAID arrays and is fully compatible with Digiever DS-8588-SRM Pro+. 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.
How to recover data from a Digiever
DS-8588-SRM Pro+ has 8 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:
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Ensure you have enough free space to store the image. Its size will typically match the size of the original disk.
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In the main window, select the target disk and choose Tools - Save Disk. You can also select multiple disks if needed.
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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.
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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 Digiever DS-8588-SRM Pro+ 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 |
If the NAS Digiever DS-8588-SRM Pro+ device is not accessible or not recognized by the network, data recovery can still be possible, but it may require professional assistance and specialized tools.
Here are a few steps you can try before seeking professional help:
If none of these steps work, it is recommended to contact a professional data recovery service. They have the expertise and specialized equipment to recover data from inaccessible or unrecognized NAS devices. They can disassemble the device, access the hard drives directly, and attempt data recovery using advanced techniques.
Remember to always have a backup of your important data to avoid such situations in the future.