Operating the Enclosure
2–3
Power Application and Removal
To turn O
N
the enclosure, apply power to the AC power supply. Shutting down the
enclosure involves quiescing the controllers and disconnecting the AC power cords from
the enclosure power supplies.
Turning the enclosure O
N
causes the following actions to occur:
■
Power supplies 12 VDC and +5 VDC for enclosure operations.
■
Fans draw cooling air flow through the enclosure.
■
EMU and array controllers initialize system operations.
■
ECBs begin charging.
Enclosure operations begin once enclosure power supplies receive AC source power.
NOTE:
Before applying AC power to the enclosure, completely configure the entire subsystem
(including the host and array controller cabling) as described in the appropriate publications.
Fault Detection
Fault detection involves identifying errors and providing an indication to the user for
analysis.
The EMU constantly monitors the operational status of the enclosure and its elements. In
some instances, corrective action occurs automatically. Enclosure status changes are
indicated by:
■
A combination of light emitting diodes (LEDs) on the CRU and EMU
■
An EMU audible alarm
■
An optional maintenance terminal that connects to an array controller
Chapter 3 lists the status items that are monitored by the EMU.
For a detailed description of status LEDs and specific error conditions, see the chapter that
discusses the specific element.