Shutting Down The Subsystem; Automatic Shutdown Using Standby Power Mode; Full Power Shutdown - Compaq RA8000 User Manual

RA8000 and ESA12000 Storage Subsystems
13. In a dual-redundant array controller configuration and if the ECB was replaced for
both cache modules, connect the PC or terminal to the other array controller's
maintenance port. The array controller to which you're now connected is "this
controller."
14. Repeat steps 9 through 12.
15. Remove the old ECB SBB.
5.6

Shutting Down the Subsystem

Various ways exist for the subsystem to shut down. It can shut down automatically as a
result of a power failure or component problem, in response to the EMU communicating
with the array controller, or when you manually shut down the subsystem.
The EMU in any enclosure can initiate a shutdown to protect the components from an
overtemperature condition. The conditions that cause the EMU to initiate this action
include one or more of the following:
•
Any two temperature sensors register a temperature of 50ºC (122ºF)
•
Removing one or more blowers for approximately 8 minutes
•
No blowers have been operational for approximately 8 minutes
•
Fewer than four operational power supplies

5.6.1 Automatic Shutdown Using Standby Power Mode

When the subsystem operates in the standby power mode, the dc power becomes
disconnected from the backplane. However, ac input power is still applied to the shelf
power supplies. In this mode, the EMU alarm control switch functions as the standby
power switch. To restore dc power to the backplane, press the alarm control switch on
each enclosure EMU.

5.6.2 Full Power Shutdown

A full power shutdown means removing the dc power from the backplane (standby power
mode), then removing ac power from the ac input power entry controllers in each
enclosure.
When you are ready to turn on the subsystem, turn on the expansion enclosures first, then
turn on the master enclosure.
5–10 EK–SMCPR–UG. A01