Users Guide

According to the default server slot priority setting, power is equally apportioned to all slots. Changing the slot priorities allows
administrators to prioritize the servers that are given preference for power allocations. If the more critical server modules are left at their
default slot priority of 1, and the less critical server modules are changed to lower priority value of 2 or higher, the priority 1 server modules
is powered on first. These higher priority servers get their maximum power allocation, while lower priority servers may be not be allocated
enough power to run at their maximum performance or they may not even power on at all, depending on how low the system input power
cap is set and the server power requirements.
If an administrator manually powers on the low priority server modules before the higher priority ones, then the low priority server modules
are the first modules to have their power allocation lowered down to the minimum value, in order to accommodate the higher priority
servers. Therefore, after the available power for allocation is exhausted, CMC reclaims power from lower or equal priority servers until
they are at their minimum power level.
NOTE: I/O module, fans, and mainboard, physical disk drives, storage adapters are given the highest priority. CMC
reclaims power only from the lower-priority devices to meet the power needs of a higher-priority device or server.
Assigning Priority Levels To Servers
When additional power is required, server priority levels determine which servers the CMC draws power from.
NOTE: The priority you assign to a server is linked to a server's slot and not to the server itself. If you move the server
to a new slot, you must re-configure the priority for the new slot location.
NOTE: To perform power management actions, you must have the Chassis Configuration Administrator privilege.
Assigning Priority Levels To Servers Using CMC
Web Interface
To assign priority levels:
1. In the left pane, click Server Overview > Power > Priority.
The Server Priority page lists all the servers in the chassis.
2. From the Priority drop-down menu, select a priority level (1–9, where 1 is the highest priority) for one, multiple, or all servers. The
default value is 1. You can assign the same priority level to multiple servers.
3. Click Apply to save your changes.
Assigning Priority Levels To Servers Using
RACADM
Open a serial/Telnet/SSH text console to CMC, log in, and type:
racadm config -g cfgServerInfo -o cfgServerPriority -i <slot number> <priority level>
where <slot number> (1–4) refers to the location of the server, and <priority level> is a value between 1–9.
For example, to set the priority level to 1 for the server in slot 4, type the following command:
racadm config -g cfgServerInfo -o cfgServerPriority -i 4 1
Viewing Power Consumption Status
CMC provides the actual input power consumption for the entire system.
Managing and Monitoring Power
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