How to Recover NAS/SAN Data, and Configure a Network-Attached Storage System
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- Network Attached Storage
- How to connect an SAN storage to a network
- Initial configuration of the network storage
- Installing and configuring Java
- How to create and configure a network drive
- How to add a network address to exchange data
- Configuring iSCSI initiator
- Disk initialization
- Setting up a hard disk
- Opportunities offered by xStack Storage
- How to recover data from a network storage drive
- How to create a disk image
- Questions and answers
Regardless of how much storage space our computers have, we always need more. The issue of storing data is always relevant, for example, if you do some video editing, photography or other work that requires large volumes to store your data, or if you need to create a network-attached storage for a small office.
Storing data requires special attention because in case of any hardware issue, error or accidental deletion, you can lose important information, and the recovery process may take quite a long time and not always be successful.
Before you can make your choice, let’s have a closer look at the differences between the two and at how they work.
Further in this tutorial for configuration of a network storage and recovery options, we will find out how NAS (Network Attached Storage) differs from SAN (Storage Area Network).
Also, we will throw some light on how to connect it to a network, configure network access, create a network drive, explore the opportunities provided by iSCSI initiator and how to configure it, and finally, we’ll also cover the procedure for lost data recovery from a SAN/NAS drive.
A Network-Attached Storage (NAS) is a device or server with an array of disks, which is connected to a network. All members of such network can use the data stored on such device.
The main difference from a conventional storage device which is connected directly to a computer is that in the case of NAS, the operating system and other software is designed for the only purpose – storing data.
A Storage Area Network (SAN) is an architectural solution to enable external storage devices to be connected to servers in such a way that the operating system can recognize the connected network drives as local disks.
SAN is a network designed to ensure connecting equipment and software to servers. It can transfer information from one storage device to another, and help different servers to exchange information, which accelerates data backup and recovery processes.
SAN accesses data at the block level. Its main input-output protocol is iSCSI (Small Computer System Interface). A computer “sees” such storage as its own local disk.
iSCSI is a network protocol for working with data storage systems, and it lets them interact with computers within a network.
Such storage system can be organized with almost any operating system, because it is built on the logical level and doesn’t require any special hardware for handling data (such as disks or disk controllers). This feature is included into most operating systems and can be enabled easily.
Windows is no exception, and it includes iSCSI components as extra elements.
So what’s the difference between the two approaches? In plain English, SAN is a network drive which enables data exchange in blocks, just as it happens in local disks.
Meanwhile, NAS is a network file system, and a resource with shared access. It is a kind of a file server which can be access through your home network.
SAN is a block-based device delivered over the network. and NAS is a file system delivered over the network.
In fact, NAS provides both a storage and a file system. It is often contrary to SAN, which only provides block-based storage and leaves any file system issues on the side of the “client”. Typical SAN protocols include Fibre Channel, iSCSI, ATA over Ethernet (AoE) and HyperSCSI.
What is inside the block-based concept of SAN? A block is a contiguous set of bits or bytes that forms an identifiable unit of data. This term is used in database management, word processing, and network communications.
So which way of storing data should you choose: NAS or SAN? The answer depends on your needs and opportunities, because these are two different configurations designed for different tasks. Access to files and shared use of information for apps on various server platforms within a local network – choose NAS. High-speed block access to data bases, consolidated storage with improved effectiveness and efficiency – go for SAN.
Despite their differences, SAN and NAS are not mutually exclusive and can be united into a hybrid SAN-NAS system, a combination of file-level protocols (NAS) and block-based protocols (SAN) within one configuration. The file system of a shared drive can also be run over SAN to provide file system services.
The shared use of a storage usually simplifies the task of its administration and adds more flexibility, because for moving the storage from one server to another you don’t have to physically move cables and storage devices around.
In what follows you will learn how to assemble and configure a SAN storage based on D-Link DSN-1100-10 supporting RAID 0, 1, 1+0 and 5.
First of all, assemble the storage, fix the drives in the bays.
Then slide them into the corresponding slots of the main case.
That’s actually all you need to do in terms of assembly. The final step is to connect it to a power outlet and to the network.
To configure the SAN storage, you need to connect it to the network, or directly to a computer, with the help of a network cable. Plug one end of the cable into the Management Port of the storage,
and the other – into the LAN port of the router.
Plug in the power cable and connect it to the power outlet.
If you choose to connect the storage directly to the computer, you’ll need a network cable of a special type, known as crossover cable.
For such connection type, you plug the other end of the network cable into the LAN port of your computer instead of the router.
Turn on the storage system and wait until a LED light appears on the front panel – it means the server has booted.
For initial configuration of the storage, you should open a browser on your computer which is connected either to the network or directly to the storage. Type the network storage address in the corresponding line – this address is specified in the user’s manual or other documents that come supplied with the storage. After that, the web assistant will start looking for it.
When it’s ready, let’s get down to configuring. Accept the license agreement and set the administrator password.
Enter IP address, subnet and gateway for the Management Port if the latter has to be modified, then click Next.
Now you need to enter Data Port settings for the iSCSI connection. Alternatively, you can choose to specify them later and click Skip to Email Notification.
In the next tab, you can enable and set up Email Support. When it’s configured, the application will send you notifications about the storage status, errors and failures.
Review the settings, and if everything is correct, click Finish.
If you need to change anything, just return to the previous window and edit the settings.
That’s all about primary configuration.
In the next window, you’ll be suggested to download and install Java. It is required for xStack Storage to work normally, and we’re using this specific application to manage the storage. An Internet connection is required for the installation, so just click on this link and install the package.
If your computer already has Java installed, click on the link below to download xStack Storage app.
Add the application to exceptions because Java may block it.
Open the Start menu, and find the line Configure Java.
Jump to the Security tab and add the address.
Confirm that you agree to run the application by checking this box.
Allow Java access in the firewall. After that, the xStack Storage application will start.
To access the storage information and settings, enter the registration data – username and password.
As you do that, connection with the storage will be established.
Now you need to create a disk and configure network access for it.
Open Volume Creation Wizard.
Give the volume name here and select advanced settings.
If you need help in choosing the best way to organize your storage, check the first option.
But if you know the exact details, select the second option and click Next.
Choose a composition type (i.e. the type of disk array).
If you need to select specific disks, choose the second option here and find the disks you need in the list.
Specify the size for the volume you are going to create.
Finally, choose the corresponding iSCSI network access type.
To all initiators, to an initiator from the list, to an initiator which is not on the list, no access at all, Next, and Finish.
Now the volume is created successfully.
If you haven’t specified a network address to exchange data during primary configuration, do it now. To do it, open Network settings.
Right-click on the Ethernet port and choose Create Portal.
Specify IP address, subnet, gateway, and click OK.
Below, you can enable or disable administrator rights for this portal.
Now the storage basic configuration is complete, the last step is to connect it to the computer.
Later, I’ll go into details of the xStack menu items.
To configure the connection to the storage, plug the end of the network cable into the Data Port.
On a Windows computer, use the search field to find iSCSI Initiator.
If you launch this application for the first time, the operating system will suggest to enable the corresponding service that would connect the disk every time the operating system boots.
Here, give the path to the iSCSI network disk. Open the Targets tab and enter the server address into this field. That is, the address of the port where data exchange is set up, and click Quick connect.
Now hit “Quick connect,” select the disk in the window that opens
and click Connect.
If the connection was successful, the next step is to initialize the disk and assign a drive letter to it. It can be done either through Computer Management or Disk Management.
Go to: Start – Control Panel – Administrative Tools – Computer Management – Disk Management.
Or right-click on the Start menu and select Disk Management.
When the initialization is over, the disk will be accessible as a local physical disk.
Yet it won’t be displayed in the Explorer, because it has to be set up for further operation. Specify the file system type, size, and assign a drive letter.
In Disk Management, right-click on the disk and select New Simple Volume – Next.
Specify the disk letter.
Choose the file system. Then click Next and Finish.
Now the disk should appear in the Explorer, you can use it and save the information there.
This way, you can use iSCSI Initiator to connect a network drive to any computer within this network.
Now let’s give a quick overview of the menu you can find in xStack Storage. For a more detailed description, check the documents that come supplied with your storage device.
In the File tab you can:
- Add a new connection;
- Remove an existing connection;
- Log out;
- Configure auto-logon;
- Exit the application.
In the tab View, open Volume settings to modify Initiator access options, scan, destroy, grow or reconfigure the volume.
In the tab System Administration you can access other server management options: Restart, Shutdown and Restore Factory Defaults.
You can also add a user or change the administrator’s password.
In Network settings, you can add and configure one more portal, or remove the existing one, or create a group of ports to reduce the network load and increase its speed, and so on.
In the Tools tab, you can customize the time display, run the volume creation wizard, or save event history.
In addition, there are tabs containing detailed information about the disk, its status, settings etc.
While you are configuring and managing the storage system, you may accidentally remove important information, format the disk or recreate the volume and cause a loss of data. Even if it happened, don’t worry: with the help of our data recovery tool, Hetman Partition Recovery, you’ll be able to have them back.
Hetman Partition Recovery lets you restore lost data from such disks without effort. The utility will scan the network drive, find the lost data and help you to save them, in an easy and effective way.
Here is what you do to get your data back:
Step 1. Download, install and run Hetman Partition Recovery. As you can see, the program has identified this disk type easily.
Step 2. In the Drive Manager, select the disk, right-click on it and choose Open.
Step 3. At first, try Fast scan – it will take less time.
Step 4. If the fast scan can’t find the deleted data, then go for Full analysis.
The file recovery wizard will scan the selected volume immediately and display the scan results in the right side of the program’s window.
Step 5. When the scan is over, all you need to do is to select the deleted files you want to restore and then click Recovery.
Step 6. Specify where to save the data and click Recovery again.
Also, our program can create a disk image and the conduct all recovery operations with this image which increases your chances to restore the deleted information successfully, because multiple rounds of scanning may result in data overwriting.
Step 1. Open the Tools tab and click Save disk.
Specify the location where you want to save the image and click Save.
As you can see, recovering lost information doesn’t require you to be an IT expert, and by using this tutorial you can easily handle this task.
You can use our program for data recovery in any of the following cases:
- To recover files lost after deleting, after formatting partitions, system errors, virus attacks and other scenarios that involve loss of data.
- To recover data from internal and external hard disks, USB storage devices, SD memory cards, cameras and other devices used to store information.
- and to recover lost photos, videos, music, documents and other file types.
Now you know how to create your own network-attached storage and protect it against loss of data, and what to do if some information was lost in spite of all your efforts.