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RE: [Freeipmi-devel] Re: SEL datestamp 01-Jan-1970?

From: Andy Cress
Subject: RE: [Freeipmi-devel] Re: SEL datestamp 01-Jan-1970?
Date: Tue, 17 Feb 2009 12:50:11 -0800


That date is actually a 0 value, meaning 0 seconds since 1-Jan-1970.  
Most of the time, the BMC stays running on 5V standby power, but if the
BMC firmware restarts (e.g. after input power is lost or unplugged), it
starts over and starts its clock value at 0 until BIOS comes up and
gives it the real clock value.  
So, you'd expect to see a "Pre-init timestamp" in this case because the
SEL shows that the input power was lost.  


-----Original Message-----
From: address@hidden
[mailto:address@hidden On
Behalf Of Al Chu
Sent: Tuesday, February 17, 2009 12:34 PM
To: address@hidden
Cc: address@hidden; address@hidden
Subject: [Freeipmi-devel] Re: SEL datestamp 01-Jan-1970?

Hey Won,

Well, I don't know if "normal" is the right phrase to use :-)  From my
experiences, many motherboards do report incorrect timestamps.  FreeIPMI
simply parses whatever information is on the motherboard.  So if it is
given a bad timestamp, it will output whatever that timestamp equates


On Tue, 2009-02-17 at 08:29 -0800, Won De Erick wrote:
> Hi All,
> it seems that the CMOS battery is just fine. I've replicated this to
several similar boxes.
> Is this related to how freeipmi parses logs? or this is just normal?
> Thanks in advance.
> Won
> --- On Fri, 2/13/09, Won De Erick <address@hidden> wrote:
> > Hi Al,
> > 
> > I noticed the following erroneous datestamps when viewing
> > SEL.
> > 
> > #ipmi-sel
> > 144:08-Feb-2009 03:51:08:System Event System
> > Event:Timestamp Clock Synch
> > 164:08-Feb-2009 03:51:03:System Event System
> > Event:Timestamp Clock Synch
> > 184:08-Feb-2009 03:51:25:System Event System Event:OEM
> > System Boot Event
> > ...
> > 444:01-Jan-1970 08:00:11:Power Supply Power Supply 2:Power
> > Supply input lost (AC/DC)
> > 464:01-Jan-1970 08:00:12:Power Unit Power
> > Redundancy:Entered from Non-redundant:Insufficient Resources
> > 484:01-Jan-1970 08:00:50:System Event System
> > Event:Timestamp Clock Synch
> > 504:10-Feb-2009 11:45:09:System Event System
> > Event:Timestamp Clock Synch
> > 
> > I've replicated this to several machines. Though the
> > CMOS battery could be the potential reason, I want to know
> > if ipmi-sel is related to this, or has something to do with
> > this.
> > 
> > Thanks,
> > 
> > Won
Albert Chu
Computer Scientist
High Performance Systems Division
Lawrence Livermore National Laboratory

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