Instruction Manual

WARNING!
To reduce the risk of electrical shock, fire, or damage to the equipment, do not plug telephone or
telecommunications connectors into the “RS23 2 ONLY” r eceptacle.
EMU functions
The primary functions of the EMU include:
• Using the Enclosure Services P rocessor (ESP) to control the Enclosure Ser vices Interface (ESI) and
communicate with the controllers.
• Assigning the Enclosure Number (En), based upon the cabinet address bus feature.
• Displaying the bay 1 loop ID.
• M onitoring enclosure operation.
• Detecting, reporting, recording, and displaying conditions.
• Displaying EMU, enclosure, and element status.
• Implementing automatic corrective actions for some conditions.
• Providing enclosure status data to the controllers.
• Reporting the WW N and the logical address of all drives.
NOTE:
Although the EMU can determine the logical address of a drive, the EMU can neither display nor change
this information. The Command View EVA GUI can display the addresses from the EMU-supplied
status information.
EMU monitoring functions
The internal EMU circuitry monitors the enclosure and element functions listed in Table 16.
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Storage system hardware components