Block storage divides data into blocks and stores them as chunks of data. Each block has a unique ID that allows the system to place data wherever it is most easily accessible. As blocks don't store any metadata about files, so a server-based operating system manages and uses these blocks in the hard drive. Whenever the system requests data, the storage system collects the blocks and gives the result back to the user. Block storage deployed in a storage area network (SAN) stores data efficiently and reliably. It works well when a large amount of data needs to be stored and accessed frequently—for example, database deployment, email servers, application deployment, and virtual machines.
SAN storage is sophisticated and supports complex, mission-critical applications. It is a high-performance storage system that communicates block-level data between the server and storage; however, SAN is significantly costly and should be...