Owner's manual

Figure 19 EMU controls and displays
1. Status indicators:
a. EMU—This flashing green is the heartbeat for an operational EMU.
b. Enclosurepower—Whenboththe+5VDCand+12VDCarecorrect,thisgreenLEDison.
c. Enclosure fault—This amber LED is normally off. The LED is lit when an enclosure error condition exists.
2. Alphanumeric display—A two-character, seven–segment alphanumeric display of the enclosure functions
and status.
3. Function select button—The primary function of this button is to select a display group function. The
indicatorisonwhenanerrorconditionexists.
4. Display group select button—This button is used to view display groups and control the audible alarm. The
indicator is on when the audible alarm is muted or disabled.
5. RS2 3 2 – for use by HP-authorized service representatives
6. LCD ONLY–unused
7. CAB ONLY–enclosure address bus connector
WARNING!
To reduce the risk of electrical shock, fire, or dam age to the equipment, do not plug telephone or
telecommunications connectors into the “RS232 ONLY” receptacle.
EMU functions
The primary functions of the EMU include:
• Using the Enclosure Services Processor (ESP) to c ontrol the Enclosure Services Interface (ESI) and
communicate with the controllers.
• Assigning the Enclosure N umber (En), based upon the cabinet address bus feature.
• Displaying the bay 1loopID.
• Monitoring 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 WWN and the logical address of all disk drives.
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Enterprise Virtual Array hardware components