NonStop NS-Series Operations Guide (H06.12+)

1. Before you power on any system enclosures, power on the external system devices and any
other devices you want started when the system starts. External system devices include tape
devices, Enterprise Storage Systems (ESSs), printers, and terminals.
Refer to the documentation that accompanies the device for instructions on powering on.
For example:
• You must power on Fibre Channel to SCSI Converter devices connected to your system
before you power on the tape devices attached to it. The converter must be powered
on first to be able to discover the tape devices as they are powered on.
• Maintenance switches installed outside of a modular cabinet must be powered on
according to the instructions provided with the switch.
2. Locate the circuit breaker that controls the power cords connected to the system cabinets.
In most case, each modular cabinet in a system powers on as soon as soon as the power is
applied. In addition, these components power on when the Integrity NonStop NS-server is
powered on:
• NonStop I/O enclosures connected to the system
• Maintenance switches installed in a modular cabinet power
3. To physically monitor power-on activity:
a. Check fan activity for the processor switches, processor Blade Elements, IOAM or VIO
enclosures, and disk drive enclosures. Check that the fans are turning and that you can
feel air circulate through the components.
b. After the POSTs finish, check that only green power-on LEDs are lit in the system
components before you start the server. For more information about status LEDs, see
Using the Status LEDs to Monitor the System on page 3-20.
4. After the POSTs finish, check the AC power cords. Perform this test only if you have
connected redundant power cords to separate circuits:
a. If you have a UPS installed, switch off the UPS outputs.
b. If you do not have a UPS installed:
a. Locate the circuit breaker that controls half the power cords.
b. Switch this breaker off.
c. Check that all components are still operating.
NOTE: The maintenance switch does not have redundant power.
d. Switch this breaker back on.
e. Locate the other circuit breaker that controls the other half of the power cords.
f. Switch this breaker off.
g. Check that all components are still operating.
h. Switch this breaker back on.
i. If any components fail during any of the power shutdowns, see “Components Fail When
Testing the Power ” (page 168).
j. If you have a UPS installed, switch off the UPS outputs.
5. If you have a UPS installed, check that the UPS is fully charged. Then, test the UPS by turning
off both circuit breakers.
6. Log on to the OSM Low-Level Link.
7. Select System Discovery.
8. Double-click the System.
9. Double-click each Group 40n; for example, Group 400.
10. Check that the logical processors are displayed.
11. Double-click each Group 1nn; for example, Group 100.
Powering On a System 157