External Chassis Power Supply Information

Systems can be designed with redundant power supplies to prevent system shutdown due to power supply failure. When extra power supplies are present in a system, being able to see that one or two power supplies have failed enables administrators to replace power supplies and restore redundancy before the last power supply failure causes the entire system to fail. 

External Chassis Power Supply User Privileges

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External Chassis
Power Supplies Properties Elements  U, P, A NA

 

Power Supply Redundancy

Redundancy Status Status can be Full, Degraded, or Lost. If the number of power supplies in a system that is required for full redundancy is three:

Redundancy status is Full when three power supplies are working.

Redundancy status is Degraded when two power supplies are working.

Redundancy status is Lost when one power supply is working.

Full redundancy is defined by system specification. Degraded redundancy means that one or more of the extra power supplies is not working in the normal range. Lost redundancy means that there are no backup power supplies available to take over for the minimum number required, but at least one power supply is working. 

Critical/Failure status would describe a system that had no working power supply, and redundancy is designed to make this sort of system failure unlikely.

Number of Devices  Required for Full Redundancy Your system has a number of power supplies defined for full redundancy. If the number of power supplies required for Full redundancy is three, redundancy is degraded when two power supplies are working, and lost when only one power supply is working.

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Individual Power Supply Elements

Status Power supply status is indicated by the status icon for components. A green check mark ( ) indicates that a component is healthy (normal). A yellow triangle containing an exclamation point ( ) indicates that a component has a warning (noncritical) condition and requires prompt attention. A red X ( ) indicates that a component has a critical/failure condition and requires immediate attention. A blank space (     ) indicates that a component's health status is unknown.
Location Place in the system where the power supply is installed.
Type Whether the power that is supplied to the system is AC or DC.
Max Wattage Maximum wattage that the power supply can deliver.
Online Status Whether the power supply is currently delivering power to the system (online) or whether the power supply is not supplying power (offline).

Example online status values for a power supply in normal condition are:

AC Power on, AC Power Switch on, PS OK, PS On, PS Fan OK

Example online status values for a power supply in critical condition are:

AC Power off, AC Power Switch on, PS Failure, PS Off, PS Fan Failure

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