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3. Position the redundant ac power switch in the rack first, pushing the cables
Figure 14. Positioned in rack
Connecting the redundant ac power switch to the site power
You must connect the redundant ac power switch to the site power before you test
the redundant ac power switch.
Perform the following steps to connect the redundant ac power switch to the site
power:
1. Determine a suitable cable route from the redundant ac power switch to the
2. Route the main input power cable of the redundant ac power switch to the
3. Route the backup input power cable of the redundant ac power switch to the
4. Verify that the redundant ac power switch power cables are tidy. Ensure that
Testing the redundant ac power switch
You can test the redundant ac power switch before you continue installing other
SAN Volume Controller components. You can test the redundant ac power switch
later if a suitable test device is not available.
You can test whether the redundant ac power switch correctly switches between
power inputs when the main input power fails or is restored. You can either use a
volt meter to measure for voltage at the output or attach a work light, or similar
device with a C14 plug, to the redundant ac power switch output and verify that it
remains powered when a failure is simulated on either of the inputs.
Note: If you do not have a separate device to verify that there is power on the
When the instructions say "remove power", you can either switch the power off if
the site power distribution unit has outputs that are individually switched or
remove the specified redundant ac power switch power cable from the outlet of
the site power distribution unit.
Note: If at any time there is no power on the output socket, ensure that the power
40
IBM System Storage SAN Volume Controller: Hardware Installation Guide
through to the front of the rack. Mount in place using the four M6 screws. See
Figure 14.
power distribution units.
specified power distribution unit, and connect it.
specified power distribution unit, and connect it.
they do not obstruct other equipment and are tied in place where necessary.
output port of the redundant ac power switch, you can delay this test until
you connect the redundant ac power switch to the uninterruptible power
supply (UPS). In that case, power on the UPS (not the SAN Volume
Controller node) and see if it changes to battery power. The test fails if the
UPS switches to battery power for more than five seconds (any transient
indications of battery power can be ignored).
distribution sockets of the power source are powered. If they are, recheck all
of the connections and decide if the redundant ac power switch assembly,
which includes the input power cables, is defective.
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