Owner's Manual

Troubleshooting and Recovery 429
• Problem: Dynamic Power Supply Engagement is enabled, but none of the
power supplies display in the
Standby state.
–
Resolution A: There is insufficient surplus power. One or more power
supplies are moved into the Standby state only when the surplus
power available in the enclosure exceeds the capacity of at least one
power supply.
–
Resolution B: Dynamic Power Supply Engagement cannot be fully
supported with the power supply units present in the enclosure. To
check if this is the case, use the Web interface to turn Dynamic Power
Supply Engagement off, and then on again. A message is displayed if
Dynamic Power Supply Engagement cannot be fully supported.
•
Problem: Inserted a new server into the enclosure with sufficient power
supplies, but the server does not power on.
–
Resolution A: Check the system input power cap setting - it might be
configured too low to allow any additional servers to be powered up.
–
Resolution B: Check for 110V operation. If any power supplies are
connected to 110V branch circuits, you must acknowledge this as a
valid configuration before servers are allowed to power on. For more
details, see the power configuration settings.
–
Resolution C: Check the max power conservation setting. If this is set
then servers are allowed to power on. For more details, see the power
configuration settings.
–
Resolution D: Check the server slot power priority of the slot
associated with the newly inserted server, and ensure it is not lower
than any other server slot power priority.
•
Problem: Available power keeps changing, even when the modular
enclosure configuration hasn't changed
–
Resolution: CMC 1.2 and higher versions have dynamic fan power
management that reduces server allocations briefly if the enclosure is
operating near the peak user configured power cap; it causes the fans
to be allocated power by reducing server performance to keep the
input power draw below
System Input Power Cap . This is normal
behavior.