Recovering Files from RAID Disks When NAS Buffalo TeraStation TS-2RZH36T12D Won’t Turn On

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 TS-2RZH36T12D device's power management settings impact data availability and potential loss?

The power management settings of a NAS Buffalo TeraStation TS-2RZH36T12D device can have a significant impact on data availability and potential loss. Here are a few ways in which power management settings can affect data:

1. Power Outages: If the power management settings are not configured properly, sudden power outages or interruptions can occur, leading to data loss or corruption. Inadequate power backup solutions or incorrect settings can result in the NAS shutting down abruptly, potentially causing data loss.
2. Disk Spinning: Power management settings control the behavior of hard disk drives (HDDs) in the NAS. For example, the settings may include options to spin down idle drives to conserve power. While this can save energy, it can also increase the time required for the drives to spin up when data is accessed, causing delays and affecting data availability.
3. RAID Rebuilds: In a NAS with RAID configuration, power management settings can impact the rebuilding process after a drive failure. If the NAS is set to conserve power aggressively, it may delay or interrupt the RAID rebuild process, increasing the risk of data loss if another drive fails during this period.
4. Scheduled Backups and Sync: Power management settings can affect scheduled backup and synchronization tasks. If the NAS is set to power down during specific hours, scheduled backups or sync operations may be missed, leading to potential data loss and outdated backups.
5. Network Accessibility: Power management settings may control the network connectivity of the NAS. If the NAS is set to enter a low-power state or sleep mode, it may become temporarily inaccessible over the network, impacting data availability during that time.

To mitigate the impact on data availability and potential loss, it is essential to configure power management settings carefully. This includes ensuring adequate power backup solutions, setting appropriate drive spin-down timers, and scheduling power-down periods to minimize disruption to critical operations. Additionally, monitoring system logs and regularly testing data recovery processes can help identify and address any issues related to power management settings.

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

Although NAS TeraStation TS-2RZH36T12D 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 TS-2RZH36T12D. 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 TS-2RZH36T12D has 12 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;

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 TS-2RZH36T12D 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