HP ProLiant SL270s HP ProLiant SL6000 Scalable System technology - Page 21

Figure 16. HP ProLiant z6000 G6 chassis node, fan, and power control block diagram Power control logic in the z6000 G6 chassis operates in one of four possible modes as shown in Table 3. Table 3. HP ProLiant G6 chassis power control logic modes Mode Function 0 No Redundancy. Power Control Disabled. No power throttling will occur. 1 AC Redundancy with throttling. This is the default mode. It provides maximum performance with power supply redundancy. Power control logic will throttle the performance of each node if the chassis has only one operational power supply. In this mode, the servers are expected to survive an unexpected AC power loss to one of the power supplies. 2 Full AC/DC Redundancy. Power control logic will maintain a power cap value at the DC rating of a single power supply (460W, 750W, or 1200W), such that if one power supply experiences a DC or AC failure, the chassis should remain online and operational. Users should be aware of the minimum power consumption of the chassis. It must be less than the rating of a single power supply. Running the PPIC utility with the -c option will provide this information. 3 User Configurable (enabled with LO100i Advanced Pack purchase on the nodes). The user specifies the total power required to operate the 2U chassis, within the capabilities of the hardware installed. Before setting this mode, users are strongly advised to run the PPIC utility with the -c option to calibrate the minimum and maximum power consumption for the chassis. For accuracy, the -c command should be run after installing and configuring all hardware and bringing all nodes online in the 2U chassis. To avoid reduced performance due to throttling, a user configurable power cap value should not be set below or within 20% of the minimum power value provided by the -c option. 21