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7. Return the cables labeled and removed earlier to the appropriate ports on the
IOM operator panel at the rear of the enclosure.
8. If necessary, repeat steps 2 through 7 to install a second IOM or module blank.
9. Follow the instructions provided to complete a service action, which include:
a. "Returning the Top Cover to the Enclosure" section.
b. "Returning the Enclosure to the Rack" section.
IOM replacement is complete. The IOM LEDs and the IOM group LEDs on the front
operator panel return to normal status.
POWER SUPPLY UNITS
The PSU(s) supplied with the VDS41022 Expansion Enclosure may be from
different manufacturers and are rated at either 1600W or 2000W. PSUs are
designed to work in pairs of the same model and wattage. Two PSUs of the same
model and wattage can communicate with each other to balance the power
provided; when two PSUs of different models and wattage are installed in a single
enclosure, they are unable to communicate with each other. Therefore, to assure
N+1 redundancy both PSUs in a single enclosure must be of the same model and
wattage.
The FRU contains two identical PSUs. If the enclosure you are servicing contains
the same PSU as those in the FRU you receive, you only need to replace the
single defective PSU, which can be hot-swapped. If the enclosure you are
servicing contains a different PSU from those in the FRU, you must replace both
PSUs. Replacing both PSUs requires that the system first be shut down. When
replacing both PSUs, first replace the defective PSU with one of the PSUs from the
FRU, then replace the other PSU in the system with the second PSU from the
FRU. The second PSU you replace is still fully functional and can be used in the
event that a replacement PSU of that model and wattage is required.
PSUs are accessed the hot aisle; therefore, removing the enclosure's top cover or
extending the enclosure from the rack into a serviceable position is not required.
NOTE: The maximum current draw is listed on each PSU label. The maximum input for
one PSU is 200–240V (±10%) ~ 9.48A max. This rating is for one PSU and there are
two PSUs per storage enclosure sharing the load.
Removing a PSU
To remove a PSU from the storage enclosure, follow these steps.
ESD-DEVICE: Follow proper anti-static guidelines when handling PSUs, e.g. wrist
strap, ESD mat, proper grounding, etc.
1. Identify the PSU to be removed.
2. Disconnect the CMA and swing it into the hot aisle far enough to access the
PSU (See Appendix D).
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Viking Enterprise Solutions™ Proprietary Information
ONYX Series Harware Guide
Document CTC-DOC-003005
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