Disk array
 | This article has multiple issues. Please help improve it or discuss these issues on the talk page. (Learn how and when to remove these messages)
No issues specified. Please specify issues, or remove this template. |
A disk array is a disk storage system which contains multiple disk drives. It is differentiated from a disk enclosure, in that an array has cache memory and advanced functionality, like RAID and virtualization.
Components of a typical disk array include:
Typically a disk array provides increased availability, resiliency and maintainability by using additional, redundant components (controllers, power supplies, fans, etc.), often up to the point when all single points of failure (SPOFs) are eliminated from the design. Additionally those components are often hot-swappable.
Typically, disk arrays are divided into categories:
- Network attached storage (NAS) arrays
- storage area network (SAN) arrays:
- Modular SAN arrays
- Monolithic SAN arrays
- Utility Storage Arrays
- Storage virtualization