RAID Controller

What Does RAID Controller Mean?

A RAID controller is a type of storage component that manages the disk drives in a RAID infrastructure. It provides the physical disk drives as logical units to the computer or server managing the RAID infrastructure.

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A RAID controller is also known as a disk array controller.

Techopedia Explains RAID Controller

A RAID controller typically provides grouped logical disk space to the operating system and other applications.

RAID controllers are classified based on:

  • RAID level they support
  • Number of internal or external ports
  • Drive types (SAS/SATA/PATA)
  • Number of drives it can support
  • Front-end and back-end interfaces
  • Native cache memory

The front-end interface of the RAID controller enables communication with the server host adapter, whereas the back-end interface communicates and manages the underlying disks.

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Margaret Rouse
Technology Expert

Margaret is an award-winning technical writer and teacher known for her ability to explain complex technical subjects to a non-technical business audience. Over the past twenty years, her IT definitions have been published by Que in an encyclopedia of technology terms and cited in articles by the New York Times, Time Magazine, USA Today, ZDNet, PC Magazine, and Discovery Magazine. She joined Techopedia in 2011. Margaret's idea of a fun day is helping IT and business professionals learn to speak each other’s highly specialized languages.