[Freeipmi-devel] Re: [Freeipmi-users] bmc-watchdog and the OS watchdog in BIOS

[Al Chu]

Hey Won,

I cannot speak for your particular hardware.  I'm not sure if there is a
separate independent hardware watchdog.  

I can say, the settings you make with bmc-watchdog may not survive
across a system reboot.  It's very possible that after a system reboot,
the BIOS resets the watchdog values back to the system default, no 
matter what you previously configured.

Al

On Fri, 2008-08-08 at 18:11 -0700, Won De Erick wrote:
> Hi All,
> 
> We've tried installing the bmc-watchdog utility in IBMx343 running FreeBSD. 
> We've found out that it can interact with the built-in management processor. 
> When the timer was set to 1 minute using bmc-watchdog -s command, the system 
> restarted after the specified time. But this setting did not change the OS 
> watchdog timer that was pre-configured using the BIOS utility. How are these 
> two differ from each other?
> 
> I've learned some known issues on using bmc-watchdog as specified in the 
> following:
> http://www.gnu.org/software/freeipmi/manpages/man8/bmc-watchdog.8.html
> 
> Setting the watchdog timer on the user space is incomparable with an 
> independent hardware watchdog (is this the case of the built-in management 
> processor on the IBM x343 box?). Hope to receive some lights from all.
> 
> Thanks,
> 
> Won
> 
> 
>       
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-- 
Albert Chu
address@hidden
925-422-5311
Computer Scientist
High Performance Systems Division
Lawrence Livermore National Laboratory