How long does a PWRDWNSYS restart(*no) actually take?

I have been tasked to write a program to monitor the UPS on our IBM power
system. I found a good base program-so that is all good. We have a generator
that is supposed to kick in within the 1st minute of a power failure. My
question is more of "what if the generator fails?" From my research, it
appears that the ups on the system will last for about 20 minutes.

We do an IPL each week (pwrdwnsys *immed restart(*yes)), (it is what it is,
I'm not rocking the boat on this one, so save your breath). What I see in
the log is entries indicating: this ended, that ended, etc. for about a
minute and a half, then nothing for 32 minutes when I see "Unattended IPL in
progress".

If the generator fails, I want to power down the system, but I am not sure
how much time I have to wait. The last time we did a pwrdwnsys restart(*no)
was 3 years ago when we had to replace the cache battery-and I don't recall
that far back (lol).

I want the system to power down on my terms, not the terms of the UPS. So,
good folks, how much time do I really have to power down, before my UPS runs
out of batteries? (Yes, I will allocate a little extra for the unexpected
and the fact the batteries are 7+ years old.) Just simply, at what point is
the system powered off?

(I will be away from my email from noon today until next week)





TIA



Jim Hawkins

Programmer Analyst

Interkal LLC

Kalamazoo, MI