NAS Buffalo LinkStation LS520DN0802 Data Recovery: Your Complete Guide to RAID Array Recovery

Contents

• Why can’t ordinary software tools restore files from RAID?
• How to take hard disks out of the NAS and connect them to a PC?
  • Restoring data with Hetman RAID Recovery
  • Safe recovery from disk images
  • Where are user’s files stored?
  • Comparison of software for RAID recovery

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 Buffalo also introduce some modifications to this process, and that is why data can be written to hard disk in a wide variety of ways.

How can quality of service (QoS) settings impact data transfer reliability on NAS Buffalo LinkStation LS520DN0802 devices?

Quality of Service (QoS) settings can have a significant impact on data transfer reliability on NAS Buffalo LinkStation LS520DN0802 devices. Here are a few ways QoS settings can affect data transfer reliability:

1. Bandwidth allocation: QoS settings allow you to prioritize certain types of traffic over others. By allocating more bandwidth to data transfer traffic, you can ensure a smoother and more reliable transfer process. This prevents other network activities from causing congestion and affecting data transfer reliability.
2. Traffic prioritization: QoS settings enable you to prioritize specific applications or protocols for data transfer. By giving priority to NAS-related traffic, you can ensure that data transfers are not hindered by other network activities. This helps maintain a consistent and reliable transfer speed.
3. Packet prioritization: QoS settings allow you to prioritize certain packets within a data transfer. By assigning higher priority to NAS-related packets, you can ensure that they are processed and delivered more quickly, reducing the chances of data loss or delays.
4. Traffic shaping: QoS settings enable you to shape the traffic flow, ensuring that data transfer traffic gets the necessary resources and bandwidth to maintain reliability. By controlling the flow of traffic, you can prevent congestion and prioritize data transfer, leading to a more reliable transfer process.
5. Latency management: QoS settings can help manage latency issues, which can impact data transfer reliability. By prioritizing data transfer traffic and minimizing latency, you can ensure a more efficient and reliable transfer process.

Overall, QoS settings on NAS Buffalo LinkStation LS520DN0802 devices can significantly enhance data transfer reliability by prioritizing bandwidth, traffic, packets, and managing latency. It ensures that data transfers are not affected by other network activities and provides a smoother and more reliable transfer experience.

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

Although NAS LinkStation LS520DN0802 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.

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   How to Order Remote Data Recovery

Restoring data with Hetman RAID Recovery

This program recovers data from damaged RAID arrays and is fully compatible with Buffalo LinkStation LS520DN0802. 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.

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How to recover data from a Buffalo

LinkStation LS520DN0802 has 1 HDD slots, and it supports the following array types:

• RAID 0;
• RAID 1;
• JBOD;

NAS supports:

• exFAT, VFAT, FAT 12 / 16 / 32;
• NTFS / ReFS;
• APFS / HFS+;
• Ext2 / 3 / 4 / ReiserFS / XFS / UFS / ZFS / Btrfs;
• VMFS / HikvisionFS;

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 Tools – Save 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.

   

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.

   

Where are user’s files stored?

The Buffalo LinkStation LS520DN0802 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.

Comparison of software for RAID recovery