Sun Microsystems Fire V210, Administration Manual

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3-4 Sun Fire V210 and V240 Servers Administration Guide • December 2005
Note – When OpenBoot PROM reports DIMM errors to ALOM, it sends system
concole (SC) alert messages with the incorrect memory slot position for the Sun Fire
V210 and V240 servers. However the memory errors are still valid.
3.1.3 Automatic Server Restart
Note –
Automatic Server Restart is not the same as Automatic System Recovery
(ASR), which the Sun Fire V210 and V240 servers also support. For additional
information about Automatic System Recovery see,
Section 6.11, “Automatic System
Recovery” on page 6-30 .
Automatic Server Restart is a component of ALOM. It monitors the Solaris OS while
it is running and, by default, synchronizes the file systems and restarts the server if
it hangs.
ALOM uses a watchdog process to monitor the kernel only . ALOM does not restart
the server if a process hangs and the kernel is still running. The ALOM watchdog
parameters for the watchdog patting interval and watchdog time-out are not user
configurable.
If the kernel hangs and the watchdog times out, ALOM reports and logs the event
and performs one of three user-configurable actions.
■
xir — This is the default action and does not cause the server to sync the file
systems and restart. In the event of the sync hanging, ALOM fallbacks to a hard
reset after 15 minutes.
■
Reset — This is a hard reset and results in a rapid system recovery but diagnostic
data regarding the hang is not stored.
■
None — This results in the system being left in the hung state indefinitely after
the watchdog time-out has been reported.
For additional information see:
http://docs.sun.com
, search ALOM for the
ALOM documentation.
3.2 ALOM Management Ports
The default management port is labeled SERIAL MGT. This port uses an RJ-45
connector and is for server management
only —it supports only ASCII connections to
an external console. Use this port when you first begin to operate the server.