Dell EqualLogic Configuration Guide v11.3 iiTable of Contents1 Introduction ........................................................................................................ 11.1 Audience ....................................................................................................... 11.2 Document Structure ......................................................................................... 12 PS Series Storage Arrays .......................................................................................... 22.1 Array Models .................................................................................................. 22.2 Feature Comparison ......................................................................................... 32.3 Controllers .................................................................................................... 42.3.1 Controller Types ........................................................................................ 42.3.2 Controller Redundancy................................................................................. 52.3.3 Controller Failover ..................................................................................... 52.3.4 Firmware ................................................................................................. 72.4 RAID Policies .................................................................................................. 92.4.1 RAID 5..................................................................................................... 92.4.2 RAID 6.................................................................................................... 102.4.3 RAID 10 .................................................................................................. 112.4.4 RAID 50 .................................................................................................. 123 Peer Storage Operations ......................................................................................... 143.1 Groups ........................................................................................................ 143.2 Pools........................................................................................................... 143.3 Volumes ....................................................................................................... 153.3.1 Volume Attributes ..................................................................................... 163.3.2 Volume Features ....................................................................................... 173.3.3 Thin Provisioning ....................................................................................... 173.3.4 Snapshots ............................................................................................... 183.3.5 Cloning .................................................................................................. 183.3.6 Replication .............................................................................................. 193.3.7 Clustering ............................................................................................... 244 SAN Design ......................................................................................................... 254.1 Implementation of Standards ............................................................................. 254.2 General Requirements and Recommendations ......................................................... 254.2.1 Quality of Service (QoS) .............................................................................. 26