Chapter 1: Introduction

Figure 1-12: Cooling Module

1.2.9Enclosure DIP Switches

Figure 1-13: Enclosure DIP Switches

DIP switches are located on the upper left corner of enclosure rear panel. The first tree switches determine an enclosure ID and should always be kept at their default, “0-0-0.” The two (2) switches marked as #7 and #8 have no function. The #4 switch is for controlling the onboard hub across the host ports on partner controllers, to enable/disable the onboard bypass. Switch #4 is only applicable in a dual-controller configuration. Switches #5 and #6 control host channel 4G or 2G speed.

When the onboard hub is enabled, host channels on the partner controllers will be combined, e.g., Channel 0 on Controller A and Channel 0 on Controller B combined into a host loop. Using the onboard hub enables fault-tolerant host links without the use of expensive FC switches in a DAS (Direct Attach Storage) topology.

The configuration options for setting the DIP switches is fully discussed in Chapter 4.

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321 Studios GHDX2-2430S-24F4D manual Enclosure DIP Switches, Cooling Module