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Conference noted::ultrix

Title:Volume 4, Take a RISC with ULTRIX
Notice:Read 1.*!!!! No OSF/1 questions allowed!
Moderator:SSDEVO::ROLLOW
Created:Wed Jun 05 1991
Last Modified:Thu Jun 05 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:5478
Total number of notes:14927

5458.0. "power status upate" by WOTVAX::HARTE_K (Karen Harte) Wed Jan 29 1997 09:23


Hello,

has anybody seen the following message appearing on a decstation5000 and if so 
could they tell me exactly what it means !

   Power status update: On Battery backup

and then a few minutes later :
    
   Power status update: Timer has expired

   Power status update: BEGINNING POWER FAILURE SHUTDOWN SEQUENCE	       

   Power status update: Exiting


   system shutdown has arrived.



I have to stress that this is when trying to boot a backup from a decsystem 
5240 which was restored onto a PERSONAL DECSTATION 5000/25 which is explained 
in call no 5456!

Many Thanks,

Karen									       
T.RTitleUserPersonal
Name
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5458.1NABETH::alanDr. File System's Home for Wayward Inodes.Wed Jan 29 1997 16:5610
	I looked at a V4.4 kernel for the message, the libraries in
	/usr/lib�and the programs in /usr/bin.  I couldn't find anything
	with "Power status update" in it.

	But, then I checked /dev/mem and found it.  My best guess is
	that the Model 240 has a Prestoserve NVRAM which is where the
	messages are coming from.�What's odd is that I don't think the
	Personal DECstation supports Prestoserve NVRAM, but if it does,
	that's a likely source.  Odds are the battery died and the
	NVRAM shutdown the system to prevent data loss.
5458.2following with interest as I still doubt it's really possible to get a stable system this wayKERNEL::COFFEYJLa Feline Flooz - a unix catMon Feb 03 1997 11:2417
> My best guess is that the Model 240 has a Prestoserve NVRAM which is where the
>messages are coming from.�What's odd is that I don't think the Personal DECstation
>supports Prestoserve NVRAM, but if it does,that's a likely source. 
> Odds are the >battery died and the NVRAM shutdown the system to prevent data
>loss.


Just a thought, is it possible that since the operating system was originally 
built on the DECsystem 5000/240 that the s/w thinks that it has Prestoserve NVRAM
and the reason it's barfing is because it can't find any trace of it on the 
Personal Decstation 5000/25 of the Prestoserve and therefore it just thinks it's 
broken down, hence the shutdown? 

Might there be something in the kernel/objects loaded/somewhere that's misguidedly 
trying to tell the 5000/25 that it ought to be seeing Prestoserve? 


5458.3NABETH::alanDr. File System's Home for Wayward Inodes.Mon Feb 03 1997 12:2911
	These messages don't come from any driver that I can locate.
	I think I found them because the NVRAM is part of memory and
	when I searched /dev/mem, they were there.  Either this is
	part of the supporting console code, or something in the
	memory itself.  If the original system is a Model 240, then
	it should be easy to rebuild the kernel without Model 240
	and Prestoserve support.  If the original system is a Personal
	DECstation, then it likely wouldn't have such support in the
	first place.  It couldn't hurt to clean up the configuration
	file for what features and device are actually present, but
	if that doesn't fix it, look at the hardware.