HP rp8420 HP 9000 rp8420 Server - User Service Guide, Fifth Edition - Page 94

NOTE: Fans driven to a high RPM in dense air cannot maintain expected RPM and will be considered bad by the MP leading to a "False Fan Failure" condition. Power Control If active, the manageability firmware is responsible for monitoring the power switch on the front panel. Setting this switch to the ON position is a signal to the MP to turn on 48 V DC power to the server. The PE command can also be used to send this signal. This signal does not always generate a transition to the powered state. The following conditions prevent the manageability firmware from applying 48 V DC power to the server: • Insufficient number of active bulk power supplies • Insufficient number of I/O fans • Insufficient number of main fans • Ambient temperature is in an OVERTEMP HIGH condition Unless one of the following conditions occurs, 48 V DC power to the server is maintained: • A main fan failure causes there to be an insufficient number of main fans. • A I/O fan failure causes there to be an insufficient number of I/O fans. • Ambient temperature reaches an OVERTEMP HIGH condition. • The front panel power switch is turned OFF. • The PE command is issued to the manageability firmware to turn off power to the server cabinet. Server Management Commands Table 5-10 lists the server m anagement commands. Table 5-10 Management Commands Command BO DF MA MR PE RE RR RS SYSREV TC TE WHO Description Boot a partition Display FRU Information of an Entity Return to Main Menu Modem reset Power entities on or off Reset entity Reset partition for reconfiguration Reset a partition Returns all System Revisions Send a TOC signal to a partition Broadcast a message to all users of the MP command handler Display list of MP connected users Table 5-11 lists the server status commands Table 5-11 Status Commands Command CP Description Display partition cell assignments 94 Troubleshooting