What are the different file access levels available on the QNAP SS-839 Pro NAS (Network Attached Storage) device?

The QNAP SS-839 Pro NAS device offers several file access levels, including:Administrator: This is the highest level of access, allowing full control over all features and settings of the NAS device.User: Users can be created with specific access rights to folders and files on the NAS. This level of access allows users to manage their own files and folders, but not modify system settings.Guest: This is a limited access level that allows users to access specific folders and files on the NAS without requiring a username or password.Public: This level of access allows anyone on the network to access specific folders and files on the NAS without requiring a username or password.Group: Users can be assigned to specific groups with predefined access rights to folders and files on the NAS. This level of access allows for easy management of multiple users with similar access requirements.Shared folder access: Specific access rights can be set for individual shared folders on the NAS, allowing fine-grained control over who can read, write, or modify files within those folders.These access levels can be configured through the QNAP NAS management interface, providing flexibility and security for different users and use cases.

How can one configure and manage file access levels on the QNAP SS-839 Pro NAS?

To configure and manage file access levels on the QNAP SS-839 Pro NAS, follow these steps:Log in to the QTS (QNAP Turbo NAS System) web interface by entering the NAS IP address in a web browser.Enter your login credentials to access the QTS web interface.Once logged in, click on 'Control Panel' in the main menu.In the Control Panel, click on 'Privilege Settings' or 'Shared Folders' (depending on the QTS version).In the Privilege Settings or Shared Folders section, you can create new shared folders or manage existing ones.To create a new shared folder, click on 'Create' or 'Add' (depending on the QTS version).Provide a name for the shared folder and select the desired access rights for different user groups or individual users.You can set read-only access, read/write access, or deny access for each user or group.If needed, you can also set advanced settings like quota limits, enabling or disabling file compression, and enabling or disabling encryption for the shared folder.After configuring the access levels, click on 'Apply' or 'OK' to save the changes.If you want to manage existing shared folders, click on the folder name or select it and click on 'Edit' or 'Settings' (depending on the QTS version).In the folder settings, you can modify the access rights and advanced settings for the selected shared folder.To remove a shared folder, select it and click on 'Remove' or 'Delete' (depending on the QTS version).Confirm the deletion when prompted.By following these steps, you can configure and manage file access levels on the QNAP SS-839 Pro NAS according to your requirements.

What are the security implications and considerations when setting file access levels on the QNAP SS-839 Pro NAS?

When setting file access levels on the QNAP SS-839 Pro NAS, there are several security implications and considerations to keep in mind:User Authentication: Ensure that strong and unique passwords are set for all user accounts accessing the NAS. Use a combination of uppercase and lowercase letters, numbers, and special characters. Regularly review and update user accounts to remove any unnecessary or unused accounts.Role-Based Access Control (RBAC): Implement RBAC to assign different levels of access to different user roles. This ensures that users only have access to the files and folders necessary for their job responsibilities. Restrict administrative access to a limited number of trusted individuals.File-Level Permissions: Set appropriate file-level permissions for each user or user group. Use the principle of least privilege, granting only the necessary permissions to perform required tasks. Regularly review and update these permissions to ensure they align with the changing needs of the organization.Encryption: Enable encryption for data stored on the NAS to protect it from unauthorized access in case of physical theft or unauthorized access to the device. QNAP NAS supports various encryption options, such as AES-256, to secure data at rest.Network Security: Ensure the NAS is connected to a secure network, protected by firewalls, intrusion detection systems, and regular security updates. Implement secure protocols like SSL/TLS for remote access to the NAS, and disable insecure protocols like FTP.Regular Firmware Updates: Keep the NAS firmware up to date to patch any security vulnerabilities. Enable automatic updates or regularly check for new firmware versions on the QNAP website.Backup and Disaster Recovery: Implement a robust backup strategy to ensure data availability and protection against data loss or ransomware attacks. Regularly backup data to an offsite location or cloud storage, and test the restore process periodically.Physical Security: Protect the physical access to the NAS device by placing it in a secure location, such as a locked server room or cabinet. Restrict access to authorized personnel only.Audit Logs and Monitoring: Enable and review audit logs to detect any suspicious activities or unauthorized access attempts. Implement monitoring tools to alert administrators of any unusual or potentially malicious activities.User Education: Educate users about best practices for data security, such as avoiding sharing login credentials, being cautious of phishing attempts, and regularly updating passwords.By considering these security implications and implementing appropriate measures, the file access levels on the QNAP SS-839 Pro NAS can be set in a way that ensures data confidentiality, integrity, and availability.

How to recover data from QNAP SS-839 Pro NAS

Name: How to recover data from a QNAP
Uploaded: 2023-09-17T02:59:09+03:00
Description: How to recover data from a QNAP

Is your network drive gone, and you are wondering what to do? Has a RAID system crashed, and your files are no longer accessible? Does your device display an error while booting? Have you accidentally rebuilt your RAID system? Are several hard disks out of order?

How to recover data from NAS QNAP SS-839 Pro

Data Recovery Tool

QNAP SS-839 Pro NAS Data Recovery in 2024

In this step-by-step tutorial, we’ll show you how to rebuild your RAID and recover data from SS-839 Pro.

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?

RAID Recovery™ 2.6

Recover data from damaged RAID arrays inaccessible from a computer.

Download

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

What data recovery services or software options are available for NAS QNAP SS-839 Pro devices?

There are several data recovery services and software options available for NAS QNAP SS-839 Pro devices. Some of the popular ones include:

QNAP Data Recovery Service: QNAP offers a professional data recovery service specifically designed for their NAS devices. They have a team of experts who can help recover data from failed or damaged QNAP NAS systems.
Stellar Data Recovery: Stellar is a well-known data recovery software company that offers a range of solutions for NAS devices, including QNAP. Their software can help recover data from various file systems and storage devices, including QNAP NAS.
EaseUS Data Recovery Wizard: EaseUS provides a data recovery software that supports QNAP NAS devices. It can recover deleted, formatted, or lost files from the NAS system.
R-Studio: R-Studio is a comprehensive data recovery software that supports QNAP NAS devices. It can recover data from various file systems and can handle complex data loss scenarios.
Ontrack Data Recovery: Ontrack is a professional data recovery service provider that offers services for QNAP NAS devices. They have a team of experts who can recover data from failed or damaged NAS systems.

It's important to note that data recovery success depends on various factors, such as the severity of the data loss, the condition of the NAS device, and the actions taken after data loss. It is recommended to consult with professionals or use reliable software to ensure the best possible chance of successful data recovery.

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

Although NAS SS-839 Pro 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:

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.
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.
Make sure to mark each hard disk in accordance with how they were installed inside the NAS.
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 QNAP SS-839 Pro. 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 QNAP

SS-839 Pro has 8 HDD slots, and it supports the following array types:

RAID 50;
RAID 60;
RAID 6;
RAID 5;
RAID 10;
RAID 0;
RAID 1;
JBOD;

NAS supports:

ZFS;
EXT4;
EXT3;
exFAT;
FAT32 (External Disk Only);
NTFS (External Disk Only);
HFS+ (External Disk Read Only);

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:

Make sure that you have enough free space to save the image. The image file size usually equals the disk size.
Select the disk in the main window, and choose from the menu Tools – Save Disk. You can select multiple disks to be saved.
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.
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 QNAP SS-839 Pro network-attached storage keeps QTS (QuTS hero) 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

Product	Operating system	License type	RAID controller support	Supported file systems	Virtual RAID controller support	Data recovery from damaged RAID	File preview
Hetman RAID Recovery	Windows	Paid	Yes, over 100 controllers	FAT, NTFS, Ext2/3/4, HFS+	Yes	Yes	Yes
DiskInternals RAID Recovery	Windows	Paid	Yes, over 100 controllers	FAT, NTFS, Ext2/3/4, HFS+	No	Yes	Yes
R-Studio	Windows, Mac, Linux	Paid	Yes, over 200 controllers	FAT, NTFS, Ext2/3/4, HFS+	Yes	Yes	Yes
UFS Explorer RAID Recovery	Windows, Mac, Linux	Paid	Yes, over 1,000 controllers	FAT, NTFS, Ext2/3/4, HFS+	Yes	Yes	Yes
EaseUS Data Recovery	Windows	Paid	Yes, over 20 controllers	FAT, NTFS, Ext2/3/4, HFS+	No	Yes	Yes
ReclaiMe Free RAID Recovery	Windows	Free	Yes, over 100 controllers	FAT, NTFS, Ext2/3/4, HFS+	Yes	Yes	Yes

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We will be happy to answer your questions!

Comments (3)

Hetman Software: Data Recovery 9.08.2022 12:31 #

If you want to ask a question about data recovery, from NAS SS-839 Pro, feel free to leave a comment!

Reply
Elias Brown 17.09.2023 02:39 #

Can data recovery from a NAS QNAP SS-839 Pro device be done if the device is showing signs of disk or storage media errors?

Reply
- Hetman Software 17.09.2023 02:59 #
  
  Yes, data recovery from a NAS QNAP SS-839 Pro device can be done even if the device is showing signs of disk or storage media errors. However, it is important to note that the success of data recovery depends on the severity and nature of the errors.
  If the device is still accessible and only a few files or folders are affected, you may be able to recover the data by using built-in recovery tools provided by QNAP or by connecting the drives to a computer and using data recovery software.
  However, if the device is completely inaccessible or if the errors are more severe, it is recommended to seek professional data recovery services. These experts have specialized tools and techniques to recover data from faulty NAS devices and can handle complex situations such as disk failures, RAID array issues, or firmware corruption.
  It is important to act quickly and avoid any further attempts to fix the issue yourself, as improper actions can potentially worsen the situation and make data recovery more difficult or even impossible.
  
  Reply

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Updated:
17.09.2023 2:59

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Author: Vladimir Artiukh, Technical Writer

Vladimir Artiukh is a technical writer for Hetman Software, as well as the voice and face of their English-speaking YouTube channel, Hetman Software: Data Recovery for Windows. He handles tutorials, how-tos, and detailed reviews on how the company’s tools work with all kinds of data storage devices.

Editor: Oleg Afonin, Technical Writer

Oleg Afonin is an expert in mobile forensics, data recovery and computer systems. He often attends large data security conferences, and writes several blogs for such resources as xaker.ru, Elcomsoft and Habr. In addition to his online activities, Oleg’s articles are also published in professional magazines. Also, Oleg Afonin is the co-author of a well-known book, Mobile Forensics - Advanced Investigative Strategies.

Questions and answers

What are the different file access levels available on the QNAP SS-839 Pro NAS (Network Attached Storage) device?
The QNAP SS-839 Pro NAS device offers several file access levels, including:
1. Administrator: This is the highest level of access, allowing full control over all features and settings of the NAS device.
2. User: Users can be created with specific access rights to folders and files on the NAS. This level of access allows users to manage their own files and folders, but not modify system settings.
3. Guest: This is a limited access level that allows users to access specific folders and files on the NAS without requiring a username or password.
4. Public: This level of access allows anyone on the network to access specific folders and files on the NAS without requiring a username or password.
5. Group: Users can be assigned to specific groups with predefined access rights to folders and files on the NAS. This level of access allows for easy management of multiple users with similar access requirements.
6. Shared folder access: Specific access rights can be set for individual shared folders on the NAS, allowing fine-grained control over who can read, write, or modify files within those folders.
These access levels can be configured through the QNAP NAS management interface, providing flexibility and security for different users and use cases.
How can one configure and manage file access levels on the QNAP SS-839 Pro NAS?
To configure and manage file access levels on the QNAP SS-839 Pro NAS, follow these steps:
1. Log in to the QTS (QNAP Turbo NAS System) web interface by entering the NAS IP address in a web browser.
2. Enter your login credentials to access the QTS web interface.
3. Once logged in, click on "Control Panel" in the main menu.
4. In the Control Panel, click on "Privilege Settings" or "Shared Folders" (depending on the QTS version).
5. In the Privilege Settings or Shared Folders section, you can create new shared folders or manage existing ones.
6. To create a new shared folder, click on "Create" or "Add" (depending on the QTS version).
7. Provide a name for the shared folder and select the desired access rights for different user groups or individual users.
8. You can set read-only access, read/write access, or deny access for each user or group.
9. If needed, you can also set advanced settings like quota limits, enabling or disabling file compression, and enabling or disabling encryption for the shared folder.
10. After configuring the access levels, click on "Apply" or "OK" to save the changes.
11. If you want to manage existing shared folders, click on the folder name or select it and click on "Edit" or "Settings" (depending on the QTS version).
12. In the folder settings, you can modify the access rights and advanced settings for the selected shared folder.
13. To remove a shared folder, select it and click on "Remove" or "Delete" (depending on the QTS version).
14. Confirm the deletion when prompted.
By following these steps, you can configure and manage file access levels on the QNAP SS-839 Pro NAS according to your requirements.
What are the security implications and considerations when setting file access levels on the QNAP SS-839 Pro NAS?
When setting file access levels on the QNAP SS-839 Pro NAS, there are several security implications and considerations to keep in mind:
1. User Authentication: Ensure that strong and unique passwords are set for all user accounts accessing the NAS. Use a combination of uppercase and lowercase letters, numbers, and special characters. Regularly review and update user accounts to remove any unnecessary or unused accounts.
2. Role-Based Access Control (RBAC): Implement RBAC to assign different levels of access to different user roles. This ensures that users only have access to the files and folders necessary for their job responsibilities. Restrict administrative access to a limited number of trusted individuals.
3. File-Level Permissions: Set appropriate file-level permissions for each user or user group. Use the principle of least privilege, granting only the necessary permissions to perform required tasks. Regularly review and update these permissions to ensure they align with the changing needs of the organization.
4. Encryption: Enable encryption for data stored on the NAS to protect it from unauthorized access in case of physical theft or unauthorized access to the device. QNAP NAS supports various encryption options, such as AES-256, to secure data at rest.
5. Network Security: Ensure the NAS is connected to a secure network, protected by firewalls, intrusion detection systems, and regular security updates. Implement secure protocols like SSL/TLS for remote access to the NAS, and disable insecure protocols like FTP.
6. Regular Firmware Updates: Keep the NAS firmware up to date to patch any security vulnerabilities. Enable automatic updates or regularly check for new firmware versions on the QNAP website.
7. Backup and Disaster Recovery: Implement a robust backup strategy to ensure data availability and protection against data loss or ransomware attacks. Regularly backup data to an offsite location or cloud storage, and test the restore process periodically.
8. Physical Security: Protect the physical access to the NAS device by placing it in a secure location, such as a locked server room or cabinet. Restrict access to authorized personnel only.
9. Audit Logs and Monitoring: Enable and review audit logs to detect any suspicious activities or unauthorized access attempts. Implement monitoring tools to alert administrators of any unusual or potentially malicious activities.
10. User Education: Educate users about best practices for data security, such as avoiding sharing login credentials, being cautious of phishing attempts, and regularly updating passwords.
By considering these security implications and implementing appropriate measures, the file access levels on the QNAP SS-839 Pro NAS can be set in a way that ensures data confidentiality, integrity, and availability.