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Dell EMC PowerVault MD3400 and MD3420 Series Storage Arrays Deployment Guide

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Dual RAID controller configurations

The following figures show two and four hosts, each connected to two RAID controller modules. Since each host has redundant paths, loss of a single path still allows access to the storage array through the alternate path.
Figure 1. Two hosts connected to two RAID controllers This figure shows two hosts connected to two RAID controllers.
Figure 2. Four hosts connected to two RAID controllers using two HBAs This figure shows four hosts connected to two RAID controllers.
Figure 3. Four hosts connected to two RAID controllers using one HBA This figure shows four hosts connected to two RAID controllers.
The following figure shows eight hosts, each connected to only one RAID controller module. This configuration allows the maximum number of hosts that can be connected, but provides no redundancy.
Figure 4. Eight hosts connected to two RAID controllers This figure shows eight hosts connected to two RAID controllers.
The following figures show up to four cluster nodes connected to two RAID controller modules. Since each cluster node has redundant paths, loss of a single path would still allow access to the storage array through the alternate path.
Figure 5. Four cluster nodes connected to two RAID controllers The figure shows four cluster nodes connected to two RAID controllers.
Figure 6. Four cluster nodes connected to two RAID controllers The figure shows four cluster nodes connected to two RAID controllers.

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