Operating System SurveillanceOperating system surveillance provides the service processor with a means to detect hang conditions, aswell as hardware or software failures, while the operating system is running. It also provides the operatingsystem with a means to detect a service processor failure caused by the lack of a return heartbeat.Operating system surveillance is not enabled by default, allowing you to run operating systems that do notsupport this service processor option.You can also use service processor menus and AIX service aids to enable or disable operating systemsurveillance.For operating system surveillance to work correctly, you must set these parameters:v Surveillance enable/disablev Surveillance intervalThe maximum time the service processor should wait for a heartbeat from the operating system beforetimeout.v Surveillance delayThe length of time to wait from the time the operating system is started to when the first heartbeat isexpected.Surveillance does not take effect until the next time the operating system is started after the parametershave been set.If desired, you can initiate surveillance mode immediately from service aids. In addition to the three optionsabove, a fourth option allows you to select immediate surveillance, and rebooting of the system is notnecessarily required.If operating system surveillance is enabled (and system firmware has passed control to the operatingsystem), and the service processor does not detect any heartbeats from the operating system, the serviceprocessor assumes the system is hung and takes action according to the reboot/restart policy settings.See “Service Processor Reboot/Restart Recovery” on page 250.If surveillance is selected from the service processor menus which are only available at system boot, thensurveillance is enabled by default as soon as the system boots. From service aids, the selection isoptional.Call-Out (Call-Home)Note: The call-out function is handled by the Service Focal point application on the HardwareManagement Console (HMC).The service processor can call out (call-home) when it detects one of the following conditions:v System firmware surveillance failurev Operating system surveillance failure (if supported by operating system)v Restartsv Critical hardware failurev Abnormal operating system terminationTo enable the call-out feature, do the following:1. Connect a modem to any serial port.2. Set up the following using the service processor menus or diagnostic service aids:v Enable call-out for the serial port where the modem is connected.258 EserverpSeries 615 Service Guide
