What is iSCSI and how does it work in the context of storage networking?

iSCSI stands for Internet Small Computer System Interface. It is a protocol that allows the transmission of SCSI (Small Computer System Interface) commands over an IP network, typically Ethernet. It enables the connection of storage devices such as disk arrays, tape drives, and virtual tape libraries to servers over a network.In the context of storage networking, iSCSI works by encapsulating SCSI commands and data into IP packets, which are then transmitted over TCP/IP network. It allows storage devices to be accessed remotely as if they were directly attached to the server, providing block-level access to the storage resources.Here's a simplified step-by-step process of how iSCSI works in storage networking:Initiator and Target Discovery: The iSCSI initiator (client) discovers and establishes a connection with the iSCSI target (storage device). The initiator sends a discovery request to the network, which contains the IP addresses or domain names of the potential targets.Authentication and Login: Once the target is discovered, the initiator establishes a secure connection by authenticating itself to the target. This ensures that only authorized initiators can access the storage resources. The initiator then logs in to the target, establishing a session.SCSI Command Execution: After the login process, the initiator can send SCSI commands to the target, such as read, write, or inquiry commands. These commands are encapsulated into iSCSI packets and transmitted over the IP network. The target receives the commands, processes them, and sends back the appropriate responses.Data Transfer: If the SCSI command involves data transfer, the initiator and target negotiate the parameters for data transfer, such as block size and data direction. The data is then transferred over the IP network using TCP/IP.Logout and Session Termination: When the initiator no longer needs access to the storage resources, it can send a logout request to terminate the session. This ensures proper cleanup and release of resources on both the initiator and target sides.Overall, iSCSI provides a cost-effective and flexible solution for storage networking, allowing organizations to leverage existing IP networks for storage connectivity. It enables remote storage access, consolidation, and centralized management of storage resources.

What are the advantages and disadvantages of using iSCSI for storage connectivity?

Advantages of using iSCSI for storage connectivity:Cost-effective: iSCSI utilizes existing Ethernet infrastructure, making it a more affordable option compared to Fibre Channel (FC) or other dedicated storage networks.Flexibility: iSCSI can be easily integrated into existing IP networks, allowing for flexible storage connectivity options. It can also be used over long distances, making it suitable for remote storage access.Scalability: iSCSI supports the use of multiple initiators and targets, allowing for easy expansion of storage capacity and connectivity as needed.Simplicity: iSCSI is relatively easy to set up and manage, especially compared to more complex storage protocols like FC. It uses standard TCP/IP networking, which is familiar to most IT professionals.Compatibility: iSCSI is compatible with various operating systems and can be used with both block-level and file-level storage.Disadvantages of using iSCSI for storage connectivity:Performance: While iSCSI offers good performance for most applications, it may not match the speed and low latency of dedicated storage networks like FC. This can be a limitation for high-performance, latency-sensitive workloads.Network dependence: Since iSCSI relies on IP networks, any network issues or congestion can impact storage performance. It is important to ensure a reliable and well-managed network infrastructure for optimal iSCSI performance.Security concerns: iSCSI traffic is transmitted over IP networks, which can be susceptible to security threats. Proper security measures, such as encryption and authentication, need to be implemented to protect data integrity and confidentiality.Complexity in large deployments: While iSCSI is relatively simple to manage in small to medium-sized deployments, it can become more complex and challenging to manage in large-scale environments with numerous initiators and targets.Limited distance: Although iSCSI can be used over long distances, it may not be as suitable as FC for extremely long-distance storage connectivity requirements.Overall, iSCSI is a cost-effective and flexible storage connectivity option, but it may not be the best choice for all scenarios, particularly those requiring high-performance or extensive security measures.

Does the NAS Huawei OceanStor Dorado 5000 V6 support iSCSI protocol? If yes, what are the key features and capabilities it offers for iSCSI connectivity?

Yes, the NAS Huawei OceanStor Dorado 5000 V6 does support the iSCSI protocol. Here are some key features and capabilities it offers for iSCSI connectivity:High Performance: The Dorado 5000 V6 provides high-speed data transmission and low latency, ensuring fast and efficient iSCSI connectivity.Scalability: It offers flexible scalability options, allowing users to expand storage capacity as per their requirements. This ensures that the system can handle growing data workloads.Data Protection: The Dorado 5000 V6 provides advanced data protection features for iSCSI connectivity, including RAID levels, snapshot, and remote replication. These features help in ensuring data integrity and availability.Virtualization Support: It is compatible with virtualized environments, allowing seamless integration with popular virtualization platforms like VMware, Hyper-V, and OpenStack. This enables efficient utilization of storage resources in virtualized environments.Quality of Service (QoS): The Dorado 5000 V6 supports QoS features for iSCSI connectivity, enabling users to prioritize critical workloads and allocate resources accordingly. This ensures that important applications receive the necessary bandwidth and performance.Management and Monitoring: The system provides a comprehensive management interface that allows users to monitor and manage iSCSI connectivity. It offers features like performance monitoring, capacity planning, and alerting to ensure smooth operation and proactive management.Overall, the Huawei OceanStor Dorado 5000 V6 offers a robust and feature-rich iSCSI connectivity solution, catering to the needs of modern data storage environments.

How to recover data from Huawei OceanStor Dorado 5000 V6 NAS

Name: How to recover data from a Huawei
Uploaded: 2023-08-26T03:59:14+03:00
Description: How to recover data from a Huawei

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 Huawei OceanStor Dorado 5000 V6

Data Recovery Tool

Huawei OceanStor Dorado 5000 V6 NAS Data Recovery in 2024

In this step-by-step tutorial, we’ll show you how to rebuild your RAID and recover data from OceanStor Dorado 5000 V6.

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

Is there a risk of data loss if a NAS Huawei OceanStor Dorado 5000 V6 device is physically damaged or stolen?

Yes, there is a risk of data loss if a NAS Huawei OceanStor Dorado 5000 V6 device is physically damaged or stolen. If the device is physically damaged, such as due to fire, water damage, or hardware failure, it can result in the loss of data stored on the device. Similarly, if the device is stolen, the data stored on it can be accessed by unauthorized individuals, potentially leading to data breaches or loss. It is important to have proper backup and security measures in place to mitigate these risks.

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

Although NAS OceanStor Dorado 5000 V6 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.

Go to view

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 Huawei OceanStor Dorado 5000 V6. 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.

Go to view

How to recover data from a Huawei

OceanStor Dorado 5000 V6 has 32 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:

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 Huawei OceanStor Dorado 5000 V6 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

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

Feedback

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 OceanStor Dorado 5000 V6, feel free to leave a comment!

Reply
Adrien Clerk 26.08.2023 02:48 #

Can data recovery from a NAS Huawei OceanStor Dorado 5000 V6 device be done if the device is showing signs of hardware failure?

Reply
- Hetman Software 26.08.2023 03:59 #
  Data recovery from a NAS (Network Attached Storage) device like Huawei OceanStor Dorado 5000 V6 can be challenging if the device is showing signs of hardware failure. However, it may still be possible to recover the data depending on the extent of the hardware failure and the specific circumstances.
  Here are a few steps you can take if you encounter hardware failure on a NAS device:
  Contact the manufacturer or a professional data recovery service: The manufacturer may have specialized tools or services to help recover data from their devices. Alternatively, professional data recovery services can assist in recovering data from a malfunctioning NAS device.
  Check for any backups: If you have a backup of the data stored on the NAS device, you can restore the data from the backup to another storage device.
  Attempt basic troubleshooting: Depending on the symptoms of the hardware failure, you can try some basic troubleshooting steps. For example, checking power connections, swapping out cables, or connecting the device to a different power source or computer.
  Seek assistance from IT professionals: If you have an IT department or professionals who manage your network and storage infrastructure, it is advisable to involve them in the recovery process. They may have experience with similar devices or can provide guidance on the best course of action.
  It's important to note that attempting data recovery on a failing device can potentially worsen the situation or cause further data loss. Therefore, it is recommended to consult professionals who specialize in data recovery to maximize the chances of successful recovery.
  Reply

Post comment

Updated:
26.08.2023 3:59

Evaluations:
6
/
Rating:

In other languages:
German
Spanish
Polish
Ukrainian
Russian

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 is iSCSI and how does it work in the context of storage networking?
iSCSI stands for Internet Small Computer System Interface. It is a protocol that allows the transmission of SCSI (Small Computer System Interface) commands over an IP network, typically Ethernet. It enables the connection of storage devices such as disk arrays, tape drives, and virtual tape libraries to servers over a network.
In the context of storage networking, iSCSI works by encapsulating SCSI commands and data into IP packets, which are then transmitted over TCP/IP network. It allows storage devices to be accessed remotely as if they were directly attached to the server, providing block-level access to the storage resources.
Here's a simplified step-by-step process of how iSCSI works in storage networking:
1. Initiator and Target Discovery: The iSCSI initiator (client) discovers and establishes a connection with the iSCSI target (storage device). The initiator sends a discovery request to the network, which contains the IP addresses or domain names of the potential targets.
2. Authentication and Login: Once the target is discovered, the initiator establishes a secure connection by authenticating itself to the target. This ensures that only authorized initiators can access the storage resources. The initiator then logs in to the target, establishing a session.
3. SCSI Command Execution: After the login process, the initiator can send SCSI commands to the target, such as read, write, or inquiry commands. These commands are encapsulated into iSCSI packets and transmitted over the IP network. The target receives the commands, processes them, and sends back the appropriate responses.
4. Data Transfer: If the SCSI command involves data transfer, the initiator and target negotiate the parameters for data transfer, such as block size and data direction. The data is then transferred over the IP network using TCP/IP.
5. Logout and Session Termination: When the initiator no longer needs access to the storage resources, it can send a logout request to terminate the session. This ensures proper cleanup and release of resources on both the initiator and target sides.
Overall, iSCSI provides a cost-effective and flexible solution for storage networking, allowing organizations to leverage existing IP networks for storage connectivity. It enables remote storage access, consolidation, and centralized management of storage resources.
What are the advantages and disadvantages of using iSCSI for storage connectivity?
Advantages of using iSCSI for storage connectivity:
1. Cost-effective: iSCSI utilizes existing Ethernet infrastructure, making it a more affordable option compared to Fibre Channel (FC) or other dedicated storage networks.
2. Flexibility: iSCSI can be easily integrated into existing IP networks, allowing for flexible storage connectivity options. It can also be used over long distances, making it suitable for remote storage access.
3. Scalability: iSCSI supports the use of multiple initiators and targets, allowing for easy expansion of storage capacity and connectivity as needed.
4. Simplicity: iSCSI is relatively easy to set up and manage, especially compared to more complex storage protocols like FC. It uses standard TCP/IP networking, which is familiar to most IT professionals.
5. Compatibility: iSCSI is compatible with various operating systems and can be used with both block-level and file-level storage.
Disadvantages of using iSCSI for storage connectivity:
1. Performance: While iSCSI offers good performance for most applications, it may not match the speed and low latency of dedicated storage networks like FC. This can be a limitation for high-performance, latency-sensitive workloads.
2. Network dependence: Since iSCSI relies on IP networks, any network issues or congestion can impact storage performance. It is important to ensure a reliable and well-managed network infrastructure for optimal iSCSI performance.
3. Security concerns: iSCSI traffic is transmitted over IP networks, which can be susceptible to security threats. Proper security measures, such as encryption and authentication, need to be implemented to protect data integrity and confidentiality.
4. Complexity in large deployments: While iSCSI is relatively simple to manage in small to medium-sized deployments, it can become more complex and challenging to manage in large-scale environments with numerous initiators and targets.
5. Limited distance: Although iSCSI can be used over long distances, it may not be as suitable as FC for extremely long-distance storage connectivity requirements.
Overall, iSCSI is a cost-effective and flexible storage connectivity option, but it may not be the best choice for all scenarios, particularly those requiring high-performance or extensive security measures.
Does the NAS Huawei OceanStor Dorado 5000 V6 support iSCSI protocol? If yes, what are the key features and capabilities it offers for iSCSI connectivity?
Yes, the NAS Huawei OceanStor Dorado 5000 V6 does support the iSCSI protocol. Here are some key features and capabilities it offers for iSCSI connectivity:
1. High Performance: The Dorado 5000 V6 provides high-speed data transmission and low latency, ensuring fast and efficient iSCSI connectivity.
2. Scalability: It offers flexible scalability options, allowing users to expand storage capacity as per their requirements. This ensures that the system can handle growing data workloads.
3. Data Protection: The Dorado 5000 V6 provides advanced data protection features for iSCSI connectivity, including RAID levels, snapshot, and remote replication. These features help in ensuring data integrity and availability.
4. Virtualization Support: It is compatible with virtualized environments, allowing seamless integration with popular virtualization platforms like VMware, Hyper-V, and OpenStack. This enables efficient utilization of storage resources in virtualized environments.
5. Quality of Service (QoS): The Dorado 5000 V6 supports QoS features for iSCSI connectivity, enabling users to prioritize critical workloads and allocate resources accordingly. This ensures that important applications receive the necessary bandwidth and performance.
6. Management and Monitoring: The system provides a comprehensive management interface that allows users to monitor and manage iSCSI connectivity. It offers features like performance monitoring, capacity planning, and alerting to ensure smooth operation and proactive management.
Overall, the Huawei OceanStor Dorado 5000 V6 offers a robust and feature-rich iSCSI connectivity solution, catering to the needs of modern data storage environments.