IBM 6C4 - Manual (Page 55)

v Serial Port Snoop Setup Menu
This menu can be used to set up serial port snooping, in which the user can
configure serial port 1 as a
″ catch-all ″ reset device.
From the service processor main menu, select option 1, service processor setup
menu, then select option 8 (Serial Port Snoop Setup Menu).
SERIAL PORT SNOOP SETUP MENU
1. System reset string:
Currently Unassigned
2. Snoop Serial Port:
Currently Unassigned
98. Return to Previous Menu
1>
Use the Snoop Serial Port option to select the serial port to snoop.
Note: Only serial port 1 is supported.
Use the system reset string option to enter the system reset string, which resets the
machine when it is detected on the main console on Serial Port 1.
After serial port snooping is correctly configured, at any point after the system is
booted to AIX, whenever the reset string is typed on the main console, the system
uses the service processor reboot policy to restart.
Because pressing Enter after the reset string is not required, make sure that the
string is not common or trivial. A mixed-case string is recommended.
v Scan Log Dump Policy
A scan dump is the collection of chip data that the service processor gathers after a
system malfunction, such as a checkstop or hang. The scan dump data may contain
chip scan rings, chip trace arrays, and SCOM contents.
The scan dump data are stored in the system control store. The size of the scan
dump area is approximately 4 MB.
During the scan log dump, A8xx (in the range A810 to A8FF) displays in the operator
panel. The xx characters will change as the scan log dump progresses. If the xx
characters do not change after five minutes, the service processor is hung and must
be reset.
When the scan log dump is complete, depending on how the reboot policy is set, the
system will either:
– Go to the standby state (and the service processor menus will be available),
indicated by OK or STBY in the operator panel
OR
– Attempt to reboot.
Chapter 3. Using the Service Processor 37