The Guardian Service Processor (also referred as GSP) is a subsystem within several models of server computers made by HP.
It is a separate computer system within the server that allows some service tasks. It is available as long as the system is supplied with power, even when the main operating system (usually HP-UX) is shut down, defective or not installed at all.
Common tasks of the GSP are:
Alert display configurationAutomatic System Restart configurationRemote Power Control (if the system is managed from remote)Configure asynchronous/serial portsDisplay of several status valuesReset system ("reboot")Show logs (chassis code buffer)System status of proc. modulesLAN configuration for console portFirmware upgrades reference