Power Management Features on Different Hardware Systems

The Power Management features are enabled by both the power-saving capability of the hardware, and the software provided with the Solaris operating environment. The exact nature of the power-saving mode your system goes into depends on your hardware and the compliance of the hardware with Energy Star. To determine the version of Energy Star to which your system complies, use the prtconf -vp | grep energystar command.

Power Management-capable hardware provides the features discussed in the following sections.

Energy Star 3.0-Compliant Systems

The Energy Star 3.0-compliant SPARC^TM hardware reduces power consumption by entering a low-power mode from which devices can resume full operation automatically. This hardware can turn off monitors and frame buffers, spin down disks, and drop the devices' power consumption significantly when they are idle — all while leaving the system up and running, ready for use, and visible on the network. When a job appears on the system, either through a cron process, or an external demand through a network, the devices and other hardware snap back into full-power mode within seconds.

Energy Star 2.0-Compliant Systems

Energy Star 2.0-compliant SPARC hardware does not have the capability of going into a reduced-power mode. Instead, the system completely shuts down after the designated number of minutes of idleness. The exception to this are the monitors, which do have the capability of going into low-power mode and continuing to operate. When you restart, the system takes a minute to reboot.

Systems Noncompliant with Energy Star

Systems that are noncompliant with Energy Star regulations perform power management for only the monitor. Power management is not performed for any other devices.