Dell POWERVAULT MD3600I User Manual
Dell Computer Accessories
Online Method to Upgrade Your Dell
PowerVault MD Storage Arrays From
Simplex to Duplex Mode
Information in this document applies to Dell PowerVault MD3200, MD3220,
MD3200i, MD3220i, MD3600i, MD3620i, MD3600f, and MD3620f systems.
The Dell PowerVault Modular Disk (MD) RAID storage arrays support both
duplex (dual-controller) and simplex (single-controller) configurations. You can
upgrade your existing storage array from a simplex configuration to a duplex
configuration without taking the existing storage array offline.
A duplex configuration allows for full redundancy between RAID controller
modules, non-I/O components, virtual disk paths, and physical disk paths. A
simplex configuration contains only one RAID controller module and does not
support full RAID controller module redundancy, virtual disk path, and physical
disk channel redundancy.
Figure 1. Simplex MD Storage Array (With Expansion)
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