Appendix A: Uninterruptible Power Supply
Power On
A-3
A.5 Power
On
When powering on the subsystem, the UPS must be powered on before the
subsystem. For instruction on how to power on the UPS, please refer to the
documentation that came with your UPS. Note that the power on sequence
described in
Chapter 4
will be altered as shown below:
Step 1.
Power on Fibre Channel connection devices (including hubs and
switches).
Step 2.
Power on the UPS.
Step 3.
Power on the GHDX2-2430S-16F4D subsystem.
Step 4.
Power on the host computers.
Step 5.
Trigger the firmware to allow the subsystem to detect the UPS.
To see how to do this please, refer to the
User’s Operation
Manual
that came with the subsystem.
NOTE:
A UPS can be connected to the subsystem after the subsystem has been
powered on, but you will have to trigger the firmware to allow the
subsystem to detect the UPS.
A.6 UPS Status Monitoring
If a UPS has been correctly connected to the subsystem, the status of the
UPS will be constantly monitored by the controller through the COM2
(audio jack) serial port. The status of the UPS will determine the controller’s
write policy, and messages that appear on the LCD panel and other
monitoring devices will keep you informed of the UPS status.
A.6.1 Normal Operational Status
If the UPS has been connected to main power and the UPS battery power
level is above 50%, then no status messages will appear and the default
“Write Back” write policy will be implemented by the controller.
A.6.2 UPS Messages
The following messages may appear on the LCD screen:
Message 1:
“
UPS connection is absent
”
This message appears when COM2 has not been connected to the UPS.
