Extracting Data from a RAID Disk When NAS Netgear ReadyNAS RN314 Fails to Activate: Step-by-Step Guide

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

Are there any known limitations or issues related to specific NAS Netgear ReadyNAS RN314 device models that can lead to data loss?

There have been some reported limitations and issues related to specific Netgear ReadyNAS RN314 device models that can potentially lead to data loss. Here are a few known limitations and issues:

1. Firmware Bugs: Some users have reported firmware bugs in certain models of the ReadyNAS RN314, which can result in data corruption or loss. It is important to keep the firmware up to date to minimize the risk of encountering such issues.
2. Drive Compatibility: Certain drive models or configurations may not be fully compatible with the ReadyNAS RN314. In some cases, this can result in data loss or the inability to access data stored on the drives. It is recommended to check the Netgear compatibility list and use supported drives to avoid such issues.
3. RAID Rebuild Failures: When using RAID configurations, some users have reported issues with the rebuild process after a drive failure. In certain cases, the rebuild process may fail, leading to data loss or corruption. Regular backups are crucial to mitigate the risk of data loss in such scenarios.
4. Power Supply Failures: There have been reports of power supply failures in specific models of the ReadyNAS RN314. A power supply failure can cause the device to shut down unexpectedly, potentially resulting in data loss if write operations were in progress. Using a reliable backup solution can help recover data in such situations.

It is important to note that these issues may not be common to all Netgear ReadyNAS RN314 models, and the likelihood of encountering them can vary. Regularly updating the firmware, using compatible drives, and maintaining proper backups can help minimize the risk of data loss.

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

Although NAS ReadyNAS RN314 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 Netgear ReadyNAS RN314. 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 Netgear

ReadyNAS RN314 has 4 HDD slots, and it supports the following array types:

• RAID 0;
• X-RAID;
• RAID 1;
• RAID 5;
• RAID 6;
• JBOD;

NAS supports:

• Ext2;
• Ext3;
• Ext4;
• Btrfs;

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 Netgear ReadyNAS RN314 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