Dell PowerVault MD3200 Deployment Guide - Page 11

Redundancy is established by installing separate data paths between the host and the storage array, in which each path is to one of the two RAID controller modules installed in the storage array. Redundancy protects the host from losing access to data in the event of path failure, because both RAID controller modules can access all the disks in the storage array. Single Controller Configurations Figure 2-1 through Figure 2-3 show two and four hosts, each connected to only one RAID controller module. The hosts can share storage space but without redundant paths, if one path were to fail, the server on that path would be disconnected from the storage array. Figure 2-1. Two Hosts Connected to a Single Controller Server 1 Server 2 Storage array Corporate, public, or private network Hardware Installation 11