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Environmental Monitoring
The primary function of the EMU (Figure 3–1) is to monitor, process,
report, and display power distribution, temperature, blower,
configuration, SCSI addressing, I/O module, communications, and
microcode status information. The EMU and the array controller
exchange and process some of this information.
Figure 3–1 EMU
Proper operation of an UltraSCSI subsystem requires an
operational EMU and PVA in each enclosure. Also,
communication links between EMUs are required in
multiple enclosure configurations to ensure proper
subsystem operation and error reporting.
CXO-5497A-MC
Caution
UltraSCSI RAID Enclosure 3–1
3
Unit
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