HP 9000 800/G40 battery?/cable

From: Bob Brown <bbrown_at_harper.cc.il.us>
Date: Wed Jan 30 14:11:15 2002

The batteries are supposed to keep ram intact for a SHORT duration
power failure...20 seconds might be longer than they would
last..especaially since
they are probably 10 year old batteries.

It's definetly NOT a full ups system.


>Ok guys,
>The only other person I've been able to contact regarding this
>HP console cable tells me that there are only 2 pins connected
>on his cable too, so I'm going to assume the cable -- since it
>works -- is correct. :)
>I can still post a "corrected" pin mapping, though.
>Anyway, on to the next problem. How does the battery backup
>system work?
>My understanding is that there's a battery in each PSU, and
>when you lose power, those batteries will maintain the RAM
>contents. The machine should then resume in-place when the
>power comes back. Is this right?
>Here is why I'm confused:
>The charging light came on when I first plugged the machine
>in. It went off a while later. So it seems to think the
>battery is charged.
>I tried to test this last night, by plugging the system into
>a surge bar with a disconnect switch. I booted the system,
>ran some programs, and cut the power. After about 20
>seconds, I applied power again.
>At this point the machine will boot -- noticing, and warning
>me that there was a power failure -- and bring the system up
>in the normal "hey, you didn't unmount this disk properly"
>fashion. As far as I can tell, none of the processes I'd
>left running were there.
>There is a configurable variable in the kernel -- something
>to do with power failure -- I have tried this twice with the
>variable set to both 1 and 0.
>What am I missing? At this point I'd like to find out whether
>it's likely to be operator error before I go poking around for
>the batteries. :)
>Christopher Smith, Perl Developer
>Amdocs - Champaign, IL
>/usr/bin/perl -e '
>print((~"\x95\xc4\xe3"^"Just Another Perl Hacker.")."\x08!\n");

bbrown_at_harper.cc.il.us #### #### Bob Brown - KB9LFR
Harper Community College ## ## ## Systems Administrator
Palatine IL USA #### #### Saved by grace
Received on Wed Jan 30 2002 - 14:11:15 GMT

This archive was generated by hypermail 2.3.0 : Fri Oct 10 2014 - 23:34:59 BST