How to Get Data from RAID Disks When NAS Buffalo TeraStation TS5400R0804 Fails

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 a NAS Buffalo TeraStation TS5400R0804 device's network throughput or bandwidth capacity affect data transfer and potential loss?

The network throughput or bandwidth capacity of a NAS Buffalo TeraStation TS5400R0804 device can significantly affect data transfer and potential loss in the following ways:

1. Transfer Speed: A higher network throughput allows for faster data transfer speeds between the NAS device and connected devices on the network. This means that large files or backups can be transferred more quickly, reducing the time required for data transfer.
2. Concurrent Users: A higher network throughput capacity enables the NAS device to handle multiple concurrent users accessing and transferring data simultaneously. If the network capacity is limited, it may result in slower transfer speeds or even network congestion, leading to potential data loss or corruption.
3. Backup and Recovery: Data backups and recovery processes can be time-consuming, especially when dealing with large amounts of data. A higher network throughput capacity can expedite these processes, reducing the time required for backup and recovery operations and minimizing the risk of potential data loss during these critical operations.
4. Streaming and Media Sharing: If the NAS device is used for streaming media content or sharing files over the network, a higher network throughput allows for smoother and uninterrupted streaming experiences. Insufficient bandwidth can lead to buffering issues, interruptions, or degraded video quality.
5. Remote Access: If the NAS device supports remote access, a higher network throughput capacity ensures that users can access their data and files remotely with minimal latency. Insufficient bandwidth can result in slow response times, making remote access cumbersome and potentially leading to data loss due to interrupted or failed transfers.
6. Redundancy and RAID: Many NAS devices, including the Buffalo TeraStation TS5400R0804, support RAID configurations for data redundancy and protection against drive failures. However, in RAID configurations, data is distributed across multiple drives, and the network throughput capacity affects how quickly the data can be rebuilt and synchronized in case of a drive failure. A higher network throughput can reduce the time required for data reconstruction, minimizing the risk of potential data loss during this critical process.

Overall, a higher network throughput or bandwidth capacity is crucial for efficient data transfer, reduced transfer times, and minimizing the risk of potential data loss or corruption during various operations on a NAS device like the Buffalo TeraStation TS5400R0804.

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

Although NAS TeraStation TS5400R0804 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 TeraStation TS5400R0804. 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

TeraStation TS5400R0804 has 4 HDD slots, and it supports the following array types:

• RAID 0;
• RAID 1;
• RAID 5;
• RAID 6;
• 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 TeraStation TS5400R0804 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