Reference Guide

7.12
3PAR InServ E-Class/F-Class Storage Server Physical Planning Manual
7.5 Redundant Power Requirements
Each InServ Storage Server component is supplied with redundant power supplies. The
controller nodes and drive chassis are designed to continue operating even when AC power is
lost to one of its supplies. For this feature to operate properly, each power supply line cord
within an enclosure must be attached to a separate branch circuit, each controlled and
protected by its own circuit breaker. Multiple outlets in a power distribution unit or power
strip do not constitute a separate branch circuit.
Additionally, each line cord must be plugged into an outlet that is capable of supporting the
entire load of its enclosure.
CAUTION: In site planning, it is critical that special consideration is given to this
requirement. Failure to do so might result in the overloading of the branch circuit
if a power supply failed, which could shut down the storage server and cause
similar failures in all the equipment connected to that branch circuit.
CAUTION: AC line cords should be securely attached to the customer PDU's/
outlets with cord-retention mechanisms to prevent accidental disconnection
during service activities. 3PAR provides cord retention mechanisms on 3PAR
power supplies but does not supply retention devices for connection to the
customer PDU's or outlets.
NOTE: See Chapter 5, Power Requirements for completed details on power
requirements.