HP StorageWorks 2500 Disk System - Manual (Page 18)

Whenever the EMU detects a condition that could affect operation, it performs the following operations:
• Generates an audible alarm
• Displays status in visual indicators
• Generates an error condition report
• Reports the condition to the HP-UX application software
Controls and displays
Figure 3 identifies the EMU displays, controls, and connectors.
25236a
Figure 3 EMU controls and displays
1.
Status indicators:
a. EMU heartbeat—Flashing green signifies an operational EMU
b. DS2500 power—Solid green signifies that the +5 VDC and +12 VDC signals are within
an acceptable range
c. DS2500 fault—Solid amber indicates that an enclosure error condition exists (normally off)
2. Alphanumeric display—A two-character display of the enclosure functions and status (typically
displays the enclosure ID).
3. Function select push button and back light—Enables you to specify what information appears
in the alphanumeric display. Pressing and releasing, or tapping the function select button
allows you to sequence through the different sublevels of a display group. The back light is
on when an error condition exists.
4. Display group select push button and back light—Enables you to view display groups and
control the audible alarm. The back light is on when the audible alarm is muted or disabled.
5. Communication ports—Unused in a JBOD environment
18 Components