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How to determine PSU redundancy on S-Series

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TitleHow to determine PSU redundancy on S-Series
Objective
To determine is S-Series chassis has PSU redundancy
Environment
S-Series 
K-Series 
N-Series 
Procedure
Use the command "show system"  for a quick status of the PSU 
(outputs are truncated to include only PSU relevant information)
Support-> show system

...

CHASSIS 1 INFORMATION:

PS Number  | PS Status     | PS Type
--------------------------------------------
1          | ok            | S-AC-PS        
2          | ok            | S-AC-PS        
3          | ok            | S-AC-PS        
4          | ok            | S-AC-PS        



CHASSIS 2 INFORMATION:

PS Number  | PS Status     | PS Type
--------------------------------------------
1          | ok            | S-AC-PS        
2          | ok            | S-AC-PS        
3          | ok            | S-AC-PS        
4          | ok            | S-AC-PS


Then use the "show system hardware" command to see in detail the redundancy available
 
Support-> show system hardware

...

CHASSIS 1 HARDWARE INFORMATION
------------------------------

   Chassis Type:               Bonded S8 Chassis (0x13)
   
   Chassis Version:            0
   Chassis Power Redundancy:   Redundant
   Chassis Power Available:    6400 Watts
   Chassis Power Allocated:    2220 Watts
   Chassis Power Unused:       4180 Watts
   Chassis Power Supply 1:     Installed & Operating
                               Type = S-AC-PS        
                               Power = 1600 Watts
                               Input/output type = AC/DC high power
                               Input status = OK (high-line AC input)
                               Output status = OK
                               Fan 1 speed = 3900 RPM
                               Fan 2 speed = 3750 RPM
   Chassis Power Supply 2:     Installed & Operating
                               Type = S-AC-PS        
                               Power = 1600 Watts
                               Input/output type = AC/DC high power
                               Input status = OK (high-line AC input)
                               Output status = OK
                               Fan 1 speed = 3900 RPM
                               Fan 2 speed = 3600 RPM
   Chassis Power Supply 3:     Installed & Operating
                               Type = S-AC-PS        
                               Power = 1600 Watts
                               Input/output type = AC/DC high power
                               Input status = OK (high-line AC input)
                               Output status = OK
                               Fan 1 speed = 3600 RPM
                               Fan 2 speed = 3750 RPM
   Chassis Power Supply 4:     Installed & Operating
                               Type = S-AC-PS        
                               Power = 1600 Watts
                               Input/output type = AC/DC high power
                               Input status = OK (high-line AC input)
                               Output status = OK
                               Fan 1 speed = 3150 RPM
                               Fan 2 speed = 3150 RPM
   Chassis Fan 1:              Installed & Operating
   Chassis Fan 2:              Installed & Operating

From the above output we see a more detailed status of each PSU and we see that this system Power Redundanct is "redundant" meaning that if we have a power supply failure the system will still operate fully

Note the Power Available , Power used and Power unused. We have enough power here for 2 PSUs to fail and still have redundancy 
 
Additional notes
Consult the power calculator when spec'ing power supplies for systems to ensure redundancy requirements
What are the power, UPS, and A/C requirements for the S-Series chassis
 

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