Power supply units

Power supply units (PSUs) are subcomponents of enclosures. A PSU takes electrical power from the rack Power Distribution Units (PDUs) and provides the power to the components in the enclosure.

For redundancy, the IBM® Storage FlashSystem control enclosure has four 2010 W PSUs that provide power to the system. If any two PSUs fail, the system can still run without any interruptions.

Power supplies in the IBM Storage FlashSystem control enclosure are 80Plus certified as “Titanium” efficiency.

The information about the health of the PSUs can be found in the management GUI.

Figure 1 shows the rear view of the power supply unit and its indicators. The power supply has no power switch. A power supply is active when the power cord is connected to the power connector and power source.

When viewed from the rear, the power supplies are stacked at the left side of the control enclosure. PSU 1 is at the top continuing down to PSU 4 at the bottom.

Figure 1. Power supply details
  •  1  Power supply 1
  •  2  Power supply 2
  •  3  Power supply 3
  •  4  Power supply 4
Power supply LED status
  •  1  AC good indicator
  •  2  DC good indicator
  •  3  Fault indicator
  •  4  Hook-and-loop strap for securing the power cable
  •  5  Power supply handle
  •  6  Power supply release tab

Each enclosure contains fans that enable cool air inflow and outflow over each power supply unit. The warm air is ejected through the rear of each power supply. For optimal cooling, do not obstruct the warm air outflow. Ensure that all enclosure components or fillers are installed while the system is operational.

The power supply indicators provide a summary of the status of the power supply.