User's Manual

22 Carrier Grade Chassis Management Controller User’s Guide Addendum
PSU Removals With Degraded or No Redundancy
Policy
CMC may begin conserving power when you remove a PSU or a PSU AC
cord. CMC decreases power to the lower priority servers until power
allocation is supported by the remaining PSUs in the chassis. If you remove
more than one PSU, CMC evaluates power needs again when the second PSU
is removed to determine the firmware response. If power requirements are
still not met, CMC may power off the lower priority servers.
Limitations
• CMC does not support automated power-down of a lower priority server to
allow power up of a higher priority server; however, you can perform user
initiated power-downs.
Grid Redundancy Enabled CMC alerts you of loss of
Grid Redundancy. PSUs
in standby mode (if any)
are turned on to
compensate for power
budget lost from the PSU
failure or removal.
Power Supply
Redundancy
Enabled CMC alerts you of loss of
Power Supply
Redundancy. PSUs in
standby mode (if any) are
turned on to compensate
for power budget lost
from PSU failure or
removal.
No Redundancy Enabled Decrease power to low
priority servers, as
required.
Table 1-3. Chassis Impact from PSU Failure or Removal
PSU Configuration Dynamic PSU Engagement Firmware Response