Redundant Array of Independent Disks (RAID) is a data storage virtualization technology that combines multiple physical disk drive components into one or more logical units for the purposes of performance improvement, data redundancy, or both.

Data is distributed across the drives in one of several ways, referred to as RAID levels, depending on the required level of redundancy and performance. The different schemes, or data distribution layouts, are named by the word "RAID" followed by a number, for example, RAID 0 or RAID 1. Each schema, or RAID level, provides a different balance among the key goals; reliability, availability, performance, and capacity. RAID levels greater than 0 provide protection against unrecoverable sector read errors, in addition to protection against failures of whole physical drives.

LoadMasters that have a RAID controller installed receive notifications from the RAID disk relating to the current status of the physical disks on the hardware appliance.

This document outlines the various options, notifications, and messages relating to RAID disks on LoadMasters.