Single Controller Configurations - Dell PowerVault MD3200 Deployment Manual

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
Storage array
Server 1 Server 2
Corporate, public,
or private network
Hardware Installation
11