Disk array
In today's world, Disk array has become a topic of great relevance and interest to a wide spectrum of society. Since its emergence, Disk array has captured the attention of academics, researchers, professionals and the general public due to its significant impact in various areas. Over time, Disk array has evolved and has generated endless debates, analyzes and reflections that seek to understand its implications and consequences. In this article, we will thoroughly explore the phenomenon of Disk array, examining its many facets and delving into its importance in the current context.
A disk array is a disk storage system which contains multiple disk drives.[1] It is differentiated from a disk enclosure, in that an array has cache memory and advanced functionality, like RAID, deduplication, encryption and virtualization.
Components of a disk array include:[2]
- Disk array controllers
- Cache in form of both volatile random-access memory and non-volatile flash memory.
- Disk enclosures for both magnetic rotational hard disk drives and electronic solid-state drives.
- Power supplies
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 where all single points of failure (SPOFs) are eliminated from the design.[3] Additionally, disk array components are often hot-swappable.
Traditionally disk arrays were divided into categories:[2]
- Network attached storage (NAS) arrays
- Storage area network (SAN) arrays:
- Modular SAN arrays
- Monolithic SAN arrays
- Utility Storage Arrays
- Storage virtualization
Primary vendors of storage systems include Coraid, Inc., DataDirect Networks, Dell EMC, Fujitsu, Hewlett Packard Enterprise, Hitachi Data Systems, Huawei, IBM, Infortrend, NetApp, Oracle Corporation, Panasas, Pure Storage and other companies that often act as OEM for the above vendors and do not themselves market the storage components they manufacture.[1]
References
- ^ a b Beal, Vangie (19 October 2004). "What is Disk Array Definition? Webopedia Definition". www.webopedia.com. Retrieved 2020-04-07.
- ^ a b "What Is a Storage Array? Data Server and Disk Architecture". DNSstuff. 2019-10-10. Retrieved 2020-04-07.
- ^ "What is disk array? - Definition from WhatIs.com". SearchStorage. Retrieved 2020-04-07.