Solaris Volume Manager Administration Guide

RAID Levels

RAID is an acronym for Redundant Array of Inexpensive (or Independent) Disks. RAID refers to a set of disks, called an array or a volume, that appears to the user as a single large disk drive. Depending on the configuration, this array provides improved reliability, response time, or storage capacity.

Technically, there are six RAID levels, 0-5. Each level refers to a method of distributing data while ensuring data redundancy. (RAID Level 0 does not provide data redundancy, but is usually included as a RAID classification anyway. RAID Level 0 provides the basis for the majority of RAID configurations in use.) Very few storage environments support RAID Levels 2, 3, and 4, so those environments are not described here.

Solaris Volume Manager supports the following RAID levels: