Restoring a Faulty RAID Array on NAS Buffalo Drive Station HD-CE640IU2 with Multiple Drives

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.

Are there any recommended best practices for securely storing usernames and passwords on NAS Buffalo Drive Station HD-CE640IU2 devices?

Yes, there are several recommended best practices for securely storing usernames and passwords on NAS Buffalo Drive Station HD-CE640IU2 devices:

1. Change the default admin username and password: The first step is to change the default admin username and password to a strong and unique combination. This helps to prevent unauthorized access to the device.
2. Use strong and complex passwords: Ensure that all user accounts have strong and complex passwords that include a combination of uppercase and lowercase letters, numbers, and special characters. Avoid using easily guessable passwords like birthdates or common words.
3. Enable two-factor authentication (2FA): Two-factor authentication adds an extra layer of security by requiring users to provide a second form of verification, such as a code sent to their mobile device, in addition to the username and password.
4. Regularly update firmware: Keep the firmware of the NAS device up to date to ensure that any security vulnerabilities are patched. Check the manufacturer's website for firmware updates and install them promptly.
5. Disable unnecessary services and ports: Disable any unnecessary services or ports on the NAS device to minimize the attack surface. Only enable the services that are required for your specific needs.
6. Implement network segmentation: If possible, isolate the NAS device on a separate network segment to limit access to it. This can be achieved by using VLANs or network segmentation features on your router or switch.
7. Regularly backup data: Regularly backup your data stored on the NAS device to an external storage device or cloud storage. In the event of a security breach or data loss, having backups ensures that you can recover your important files.
8. Educate users: Educate all users on best practices for password management, such as not sharing passwords, avoiding password reuse, and being cautious of phishing attempts.
9. Monitor and log activity: Enable logging and monitoring features on the NAS device to keep track of any suspicious activity. Regularly review the logs to identify any potential security incidents.
10. Physically secure the device: Ensure that the NAS device is physically secured in a locked room or cabinet to prevent unauthorized physical access.

By following these best practices, you can enhance the security of your usernames and passwords stored on NAS Buffalo Drive Station HD-CE640IU2 devices.

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

Although NAS Drive Station HD-CE640IU2 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 Drive Station HD-CE640IU2. 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

Drive Station HD-CE640IU2 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 Drive Station HD-CE640IU2 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