How to Retrieve RAID Disk Files If NAS Buffalo TeraStation TS5400D0804 Is Dead

Contents

• Why Regular Data Recovery Tools Can’t Restore Files from RAID
• Key Information About the NAS Buffalo TeraStation TS5400D0804
• 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 Buffalo 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 Buffalo TeraStation TS5400D0804 devices?

Conducting regular backups on external storage devices can mitigate data loss risks for NAS Buffalo TeraStation TS5400D0804 devices in the following ways:

1. Redundancy: By creating backups on external storage devices, you ensure that your data is stored in multiple locations. In case of any data loss or corruption on the TeraStation, you can easily restore the data from the external backup.
2. Protection against hardware failures: NAS devices like TeraStation can experience hardware failures, such as hard drive crashes. Regular backups on external storage devices provide a safeguard against such failures. If a drive fails on the TeraStation, you can replace it and restore the data from the external backup.
3. Protection against accidental deletions and user errors: Sometimes, data can be accidentally deleted or modified by users. Having regular backups on external storage devices allows you to recover the data to a previous state before the deletion or error occurred.
4. Protection against malware and ransomware attacks: Malware and ransomware attacks can encrypt or delete your data, making it inaccessible. By regularly backing up your data on external storage devices, you can restore the unaffected copies of your data and minimize the impact of such attacks.
5. Disaster recovery: In the event of a catastrophic event like fire, flood, or theft, having backups on external storage devices ensures that your data is safe and can be easily restored to a new TeraStation or another device.

To conduct regular backups on external storage devices for NAS Buffalo TeraStation TS5400D0804, you can use the built-in backup features provided by the device or use third-party backup software. Set up a backup schedule to automatically copy data from the TeraStation to the external storage device at regular intervals. It is recommended to keep the external storage device in a different location to protect against physical damage or theft.

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

Although the NAS TeraStation TS5400D0804 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 Buffalo TeraStation TS5400D0804. 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 Buffalo

TeraStation TS5400D0804 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;

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 Buffalo TeraStation TS5400D0804 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