IBM E10 Service Manual page 244

Service Processor Connection
When this setting is NO, or if the OS did not set a policy, the SP refers to Enable supplemental restart
policy for its action.
Enable Supplemental Restart Policy?: The default setting is NO. If set to YES, the SP restarts the
system when the system loses control as detected by the SP surveillance, and either:
1. The Use OS-Defined restart policy is set to NO OR
2. The Use OS-Defined restart policy is set to YES and the operating system has NO automatic restart
policy.
Refer to "SP Reboot/Restart Recovery" on page 227.
The following provides a more thorough understanding of the relations among the OS and SP restart
controls:
OS Automatic
reboot/restart after crash
setting
None
None
None
None
False₂
False₂
False₂
False₂
True
True
True
True
1 2
SP default AIX default
SP System Monitoring - Surveillance
Surveillance is a function in which the SP monitors the system, and the system monitors the SP. This
monitoring is accomplished by periodic samplings called heartbeats.
Surveillance is available during two phases:
1. System firmware bringup (automatic) and
2. Operating system runtime (optional).
System Firmware Surveillance: Provides the SP with a means to detect boot failures while the system
firmware is running.
System firmware surveillance is automatically enabled during system power-on. It cannot be disabled via a
user selectable option.
If the SP detects no heartbeats during system IPL (for 7 minutes), it cycles the system power to attempt a
reboot. The maximum number of retries is set from the SP menus. If the fail condition repeats, the SP
leaves the machine powered on, logs an error and offers menus to the user. If Call-out is enabled, the SP
calls to report the failure and displays the operating system surveillance failure code on the operator panel.
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VOLUME 3, ESS Service Guide
SP to use OS-Defined
restart policy?
No
No
Yes₁
Yes₁
No
No
Yes₁
Yes₁
No
No
Yes₁
Yes₁
SP Enable supplemental
restart policy?
No₁
Yes
No₁
Yes
No₁
Yes
No₁
Yes
No₁
Yes
No₁
Yes
System response
Restarts
Restarts
Restarts
Restarts
Restarts
Restarts