5 Things You Should Know About Storage Area Network (SAN Storage)

Efficient network storage management is crucial for the advancement & efficiency of businesses. Adopting a reliable storage management solution is vital. This helps small businesses optimize server performance, streamline data management, ensure data backup, enhance application availability and effectively prepare for potential disasters. Traditionally, there have been three options for network storage: direct-attached storage (DAS), network-attached storage (NAS), and storage area networks (SAN).

SAN has gained significant popularity among these options, enabling small businesses to achieve their performance objectives. While SANs were previously associated with larger companies, recent studies indicate that more small businesses are considering their implementation.

As the costs of SAN architecture decrease and storage requirements increase, organizations of various sizes recognize the value of investing in SAN technology. In this article, you will gain insights into everything from what is storage area network definition to the relevant essential aspects you must know. Let’s dip into the segments below and get all the details.

What is SAN?

SAN is also known as a storage area network. It is a dedicated high-speed network designed to connect data storage devices to more extensive networks. It enables seamless communication between computer systems by employing SAN switches to connect to storage pools.

These storage pools are managed by administrators who allocate logical unit numbers (LUNs). LUNs represent blocks of storage capacity. Apart from facilitating communication between storage devices & computers, SANs offer a range of additional functionalities, including:

  1. Handling application and administrative traffic.
  2. Supporting various network technologies, such as Ethernet and Fibre Channel.
  3. Connecting different types of storage devices, including robotic libraries, RAID subsystems, file servers, and tape and disk drives.

SANs’ flexibility in accommodating diverse storage devices promotes innovation. They drive continuous advancements in digital information processing and storage.

How Storage Area Networks Differ from Direct Attached Storage Networks

Disk arrays in Direct Attached Storage (DAS) networks are directly connected to servers via high-speed interconnects such as SCSI. This method provides optimal performance at a reasonable cost.

It works well for quick access to database applications. DAS might be a good option for small businesses and departmental networks. However, it might not be a good match for more intricate networks with several servers.

On the other hand, SAN (Storage Area Network) enables storage consolidation across data center solutions. It separates the storage array from the application server, reducing storage requirements.

SAN facilitates centralized storage management and allows for the redistribution of storage resources to other servers. SANs offer enhanced scalability and flexibility and are valuable for organizations with evolving storage needs.

Comparing and contrasting Storage Area Networks with Network Attached Storage

Storage Area Networks (SAN) and Network Attached Storage (NAS) share some similarities but also have notable differences. Both technologies enable remote access to storage devices through networks. However, they diverge in several aspects:

  1. Server types: SAN storage area network utilizes multipurpose servers, whereas NAS servers are dedicated to storage functions.
  2. Server operating systems: NAS typically rely on proprietary operating systems, while SANs employ open ones.
  3. Upgradability: Storage area networks are easily upgradeable, whereas NAS upgrades can be complex or impractical.
  4. Protocols: NAS commonly uses SMB (Server Message Block) and NFS (Network File System) protocols. SANs support a more comprehensive range of protocols, including Fibre Channel, Ethernet, and HyperSCSI.
  5. Protocol levels:  When a server is linked to a network with its file system, network-attached storage (NAS) functions at the file protocol level. Files are sent to the IP address of the NAS device in packet form. SANs, on the other hand, employ block protocol and send data directly to the storage array over a separate high-speed network in blocks. By hosting their file systems on SAN application servers, data is not need to go via additional servers.

While NAS offers simplicity and easy configuration, it can be prone to overload when multiple servers and clients access it.

SANs provide more efficient data transport and enable direct file system hosting on application servers. This enhances performance and eliminates potential bottlenecks associated with NAS systems.

Storage Area Networks and the Cloud

Many businesses store their data in cloud-based services, utilizing virtual servers that extend storage capacities beyond their existing infrastructure.

Cloud technology providers heavily rely on SAN technology because it connects numerous servers to storage devices. Unlike SAN systems hosted on company servers, cloud storage operates virtually through internet servers.

Moreover, cloud hosting services offer cost-effective solutions, eliminating the need for hardware investments to accommodate increased storage requirements.

Companies that are hesitant or financially constrained to invest in additional infrastructure increasingly embrace cloud storage.

Some businesses adopt a hybrid approach. They employ the cloud for archives or low-priority items. They use SANs for quick and accessible materials, allowing customization to meet practical and budgetary needs.

How Storage Area Networks Can Improve Performance?

Storage area networks offer various advantages to businesses, such as:

Enhanced disk utilization. Centralizing storage through a SAN allows resources to be utilized more effectively and efficiently.

Disaster recovery (DR). In a disaster, a SAN enables data recovery from multiple applications.

Improved application availability. SAN storage area network array employs data protection algorithms to ensure consistent and accessible data.

Faster backup speed. SAN storage devices almost instantly generate hardware-based copies of data, facilitating quicker backup processes for large data volumes.

Use Cases of SAN

Applications for SANs can be found in various settings and sectors. They offer excellent availability and performance as the storage backbone for vital business applications in enterprise data centers.

SANs’ capacity to dynamically distribute and manage storage resources, maximizing efficiency and scalability, is advantageous for virtualized settings.

Database storage environments, where quick and dependable data access is essential for mission-critical activities, are another setting where SANs are widely used.

Furthermore, SANs are essential for efficiently storing and managing enormous volumes of digital content in sectors like media and entertainment.

Future Trends in SAN

Several trends will influence future developments in SAN technology. Because cloud computing is concurrent, it’s becoming harder to distinguish between traditional SANs and cloud storage solutions, enabling seamless data mobility and hybrid deployments.

Software-defined storage, or SDS, is becoming increasingly common because of its improved automation and flexibility in managing storage resources.

By combining networking, storage, and processing onto a single platform, hyper-converged infrastructure (HCI) improves scalability and performance while streamlining deployment and management.


Understanding the critical aspects from Storage Area Network definition to types of storage area networks & their benefits is essential for businesses. This enables the optimization of network storage management. By leveraging SAN technology, companies can –

  • Improve server performance
  • Simplify data management
  • Ensure data backup
  • Enhance application availability
  • And effectively prepare for potential disasters.

The adoption of SAN architecture is no longer limited to larger organizations. This is because even small businesses increasingly recognize its benefits and consider its implementation.

Further, the storage demands continue to grow, and implementation costs are decreasing. Consequently, SAN storage is still a viable and compelling solution for businesses at all levels.

By staying informed about the five essential aspects of SAN storage discussed in this article, businesses can make informed decisions and leverage this powerful technology. They can then readily drive efficiency and productivity in their operations.


What is the difference between SAN and NAS? 

SANs provide block-level storage access over a dedicated network, while NASs offer file-level storage access over a standard network.

How does SAN improve storage performance?

SANs utilize high-speed connectivity and dedicated infrastructure to deliver faster data access and reduced latency compared to traditional storage solutions.

Are there any security risks associated with SAN?

While SANs offer robust security features, vulnerabilities such as unauthorized access or data breaches can pose significant risks if not adequately mitigated.

Can small businesses benefit from implementing a SAN?

While SANs are often associated with large enterprises, small businesses can also benefit from SAN technology’s improved performance, scalability, and data management.

What are some popular SAN vendors in the market?

Some popular SAN vendors include Dell EMC, Hewlett Packard Enterprise (HPE), IBM, NetApp, and Cisco Systems.

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