Hard disk drive- status indicator pattern (RAIDOnly) ConditionBlinks green for three seconds, amber for threeseconds, and turns off in six seconds.Rebuild abortedBack-panel features and indicatorsFigure 4. Back-panel features and indicatorsItem Indicator, Button, or Connector Description1 Power supply unit or cooling fanmodule (PS1)600 W power supply.For more information, see Power indicator codes.2 Primary enclosure managementmodule (EMM 0)The EMM provides:• a data path between the enclosure and the host server.3 Secondary EMM (EMM 1) • enclosure management functions for your enclosure.4 Information tag A slide-out label panel, which allows you to record ServiceTag.5 Power switches (2) The power switch controls the power supply output to theenclosure.6 Power supply unit or cooling fanmodule (PS 2)600 W power supply.For more information, see Power indicator codes.Enclosure Management ModuleEach EMM provides the following data path and enclosure management functions for your enclosure:• Monitoring and controlling enclosure environment elements such as temperature, fan, power supplyunits, and enclosure LEDs.• Controlling access to hard disk drives.• Communicating enclosure attributes and states to the host server.8