A-1AGeneral Storage ConceptsIn This AppendixStorage Manager Pro uses specific terms to describe storageconcepts and configurations. If you are new to storage technologyand array configurations, this section will help you understandbasic RAID technology and terminology.This section provides general RAID information, not informationspecifically about the DuraStor storage subsystem.DevicesA device is any type of physical computer storage unit such as adisk drive, controller, or enclosure.Devices A-1Controllers A-2Storage Systems A-2Active-Active Configuration A-2Stand-Alone Configuration A-2Channels A-3Disk Drives A-3Free Space A-3Partitions A-4Redundancy A-5Arrays A-5Array Types A-7