680 Implementing the IBM Storwize V5000 Gen2 with IBM Spectrum Virtualize V8.1
12.2.5 Power supply units
All enclosures require two power supply units (PSUs) for normal operation. A single PSU can
power the entire enclosure for redundancy. We advise that you supply AC power to each PSU
from different power distribution units (PDUs).
Figure 12-22 shows a fully equipped control enclosure with two supply units. The PSUs are
identical between the control and expansion enclosures.
Figure 12-22 Power supply units
The left PSU is numbered 1, and the right PSU is numbered 2.
Power supplies in both control and expansion enclosures are hot-swappable and replaceable
without a need to shut down a node or cluster. If the power is interrupted in one node canister
for less than 2.5 seconds, the canister cannot perform a fire hose dump and continues
operation from battery.
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