Guidelines For Redundant Power Cabling - HPE 3PAR StoreServ 9000 Customer Self Install Manual

• Restrain and support cables in a manner that eliminates stress on connectors and eliminates tight
bends of the cables.
• Secure fiber and AOC cables with loose fitting Velcro straps, instead of wire or cable ties.
• For cable ties, ensure that the cables are not compressed when cinching the tie, and cut the cable ties
flush with the cable tie head to prevent scratches or cuts during future service interactions.
• When the cables are restrained together, verify that storage system components and LED indicators
are easily visible and accessible for operation and maintenance.
Guidelines for disconnecting cables
To prevent damage to the internal wires of the cable or the port pins, operate the release latch on the
cable connector, and then grip the body of the cable connector to disconnect the cable instead of pulling
on the cable.

Guidelines for redundant power cabling

Power should be supplied to each component of the storage system using redundant power supplies and
redundant power distribution units (PDUs). If the power connections for the system are correctly
configured for power redundancy, the system will stay operational if a power failure occurs with an input
power source, a PDU, or a power supply.
WARNING: To avoid possible injury, damage to storage system equipment, and potential loss of
data, do not use the surplus PDU outlets. Never use PDU outlets to power components that do not
belong to the storage system or that reside in other racks.
To achieve redundant power, the storage system must have the following redundant power configuration.
See Figure 16: Redundant power configuration on page 27.
• Customer power source: Each main, independent, grounded-electrical power source should be
controlled and protected by its own circuit breaker.
• PDU:
◦ The even-numbered PDUs should be connected to customer power source (A)
◦ The odd-numbered PDUs should be connected to customer power source (B).
NOTE: The number of PDUs in a rack can vary depending on the rack and power type (such as,
single- or three-phase power).
• Power supply:
NOTE: The generic term "power supply" refers to various types of power components, such as a
power supply unit (PSU), power cooling module (PCM), or a power cooling battery module (PCBM).
◦ Controller node pair: Each power supply should be connected to a separate PDU.
◦ Drive enclosure: Each power supply should be connected to a separate PDU.
◦ Even-numbered power supplies: Each power supply 0 should be connected to an even-
numbered PDU using a black power cable.
◦ Odd-numbered power supplies: Each power supply 1 should be connected to an odd-numbered
PDU using a gray power cable.
26 Cabling the factory-integrated-in-rack option: Process overview