The EMC Disk Pools Layer
RAID, an acronym for Redundant Array of Independent Disks (Changed from its original term Redundant Array of Inexpensive Disks), is a technology that provides increased storage functions and reliability through redundancy. This is achieved by combining multiple disk drive components into a logical unit, where data is distributed across the drives in one of several ways called "RAID levels".
RAID Groups also allow you to configure the Clariion in a way so that you will know what LUNs, applications, etc., live on what set of disks in the back of the Clariion. For instance, you would not want an Oracle Database LUN on the same RAID Group (Disks) as a SQL Database running on the same Clariion. This allows you to create a RAID Group of a set of disks for the Oracle Database, and another RAID Group of a different set of disks for the SQL Database.
Using the test mapped to this layer, you can monitor the current state, capacity, and usage of each RAID group on the Clariion storage system.
Figure 1 : The tests mapped to the EMC Disk Pools layer