Definition

block storage

Block storage is a type of data storage typically used in storage-area network (SAN) environments where data is stored in volumes, also referred to as blocks

Each block acts as an individual hard drive and is configured by the storage administrator. These blocks are controlled by the server-based operating system, and are generally accessed by Fibre Channel (FC), Fibre Channel over Ethernet (FCoE) or iSCSI protocols.

Because the volumes are treated as individual hard disks, block storage works well for storing a variety of applications such as file systems and databases. While block storage devices tend to be more complex and expensive than file storage, they also tend to be more flexible and provide better performance.

Contributor(s): Sarah Wilson
This was last updated in October 2013
Posted by: Margaret Rouse

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