All you need to know about Storage Area Network (SAN) Market

storage area network (SAN)

A storage area network (SAN), often known as a storage network, is a computer network that allows users to access centralised, block-level data storage. SANs are typically used to connect servers to data storage devices such as disc arrays and tape libraries, allowing the operating system to see the devices as direct-attached storage. A storage area network (SAN) is a dedicated network of storage devices that is not accessible via the local area network (LAN).

Although a SAN only allows access at the block level, file systems developed on top of SANs allow access at the file level and are known as shared-disk file systems.

SANs (storage area networks) are sometimes known as network behind the servers and developed historically from a centralised data storage paradigm, but with its own data network. A SAN is a specialised network for data storage at its most basic level. SANs provide for the automatic backup of data, as well as the monitoring of the storage and backup processes, in addition to storing it. A storage area network (SAN) is made up of both hardware and software.It evolved from data-centric mainframe designs, in which a network's clients can connect to multiple servers that contain various sorts of data.

Direct-attached storage (DAS), in which disc arrays or merely a collection of discs (JBODs) are hooked to servers, was designed to increase storage capabilities as data volumes grew. Storage devices can be added to this architecture to improve storage capacity. However, the server that accesses the storage devices is a single point of failure, and data access, storage, and backup consume a significant portion of the LAN network bandwidth. A direct-attached shared storage design was built to address the single point of failure issue, allowing multiple servers to use the same storage device.

DAS was the first network storage system, and it's still used where data storage needs aren't too great. It spawned the network-attached storage (NAS) architecture, in which a LAN is equipped with one or more dedicated file servers or storage devices. As a result, data is still transferred through the current LAN, notably for backup. LAN bandwidth became a problem if more than a terabyte of data was stored at any given time. As a result, SANs emerged, in which a dedicated storage network was connected to the LAN and terabytes of data were transmitted through a dedicated high-speed and bandwidth network. Storage devices are connected within the SAN.

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