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D.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
Step 2. Power on the UPS.
Step 3. Power on the A16F-R2422 subsystem.
Step 4. Power on the host computers.
Step 5. Trigger the firmware to allow the subsystem to detect the UPS.
•
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.
•
If daisy chain function is applied, be sure the make all the cable
connection and then power on the A16F-R2422 that is not connected
to host computer directly before power on the first A16F-R2422
subsystem.
D.6 UPS Status Monitoring
If the subsystem has correctly connected to a UPS, the subsystem constantly
will monitor the status of the UPS 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.
D.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.
Uninterruptible Power Supply
switches).
To see how to do this please, refer to the Generic Operation
Manual that came with the subsystem.
NOTE:
Appendix D: Uninterruptible Power Supply
D-3
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