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Chapter 2
Topologies and Operating Modes
This chapter provides an overview of the supported operating modes and
topologies. This information should provide you with an understanding to make
the best choices for the optimum configuration that compliments your storage
system solution.
Essentially there are two operating modes available: Simplex and Duplex. The
NexStor 4911F, 4912F, 4931F and 4932F models with their single RAID Controller
support the simplex operating mode, and the NexStor 4921F, 4922F, 4941F and
4942F models with their dual RAID Controllers support the duplex operating
mode.
Operating Mode Overview
These operating modes allow you to configure the enclosure's drives and RAID
Controller(s) to support a variety of host environments topologies.
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Simplex – In this operating mode, the enclosure is configured as a RAID
storage system with its single RAID Controller operating in a stand-alone
configuration. This operating mode supports dual port topologies.
Duplex – In this operating mode, the enclosure is configured as a RAID
storage system with dual RAID Controllers operating in an active-active or
redundant fault-tolerant configuration. This operating mode supports
Multiple Port Mirrored topologies.
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