Power off PDUs and any remaining components in management cabinets which are powered on, such as HPE Slingshot switches, management switches, and a KVM device.
CAUTION: The nodes and switches in management cabinets should only be powered off when it has been confirmed that the management Kubernetes cluster and any Lustre or Spectrum Scale filesystems in the cabinets have been cleanly shut down. See the procedures in Power Off the External File Systems and Shut Down and Power Off the Management Kubernetes Cluster.
(Optional) Power down the modular coolant distribution unit (MCDU) in a liquid-cooled HPE Cray EX2000 cabinet.
The MCDU in a liquid-cooled HPE Cray EX2000 cabinet (also referred to as a Hill or TDS cabinet) typically receives power from its management cabinet PDUs. If the system includes an EX2000 cabinet, then do not power off the management cabinet PDUs until the MCDU has been powered off.
WARNING: Dropping power to the management cabinet PDUs without powering off the MCDU will cause an emergency power off (EPO) of the cabinet and may result in data loss or equipment damage.
Set each management cabinet PDU circuit breaker to OFF.
A slotted screwdriver may be required to open PDU circuit breakers.
To power off Motivair liquid-cooled chilled doors and CDUs, locate the power off switch on the CDU control panel and set it to OFF.
Refer to vendor documentation for the chilled-door cooling system for power control procedures when chilled doors are installed on standard racks.
Return to System Power Off Procedures and continue with next step.