topic Re: UPS Shutdown Time in Operating System - HP-UX

UPS Shutdown Time

Sandip Ghosh — Thu, 15 Aug 2002 18:25:15 GMT

UPS 3.0 KVA, A2998A
HP-UX 10.20

Can it be possible to configure shutdown time from HP-UX more than 15 min?

If possible, how?

Thanks in advance,
Sandip

Re: UPS Shutdown Time

Sajid_1 — Thu, 15 Aug 2002 18:41:18 GMT

hello,

what about adding entry in /etc/ups_conf:

shutdown_delay_mins:Number_of_mins

Re: UPS Shutdown Time

Dave Chamberlin — Thu, 15 Aug 2002 19:25:47 GMT

Just a question Sandip - how do you know your UPS can power your system for that long?

Re: UPS Shutdown Time

Sandip Ghosh — Thu, 15 Aug 2002 19:30:54 GMT

Sajid,

As far as I know, the time for shutdown is fixed to 15 min. If you increase the delay it will start the shutdown process after that stipulated time. I need to know that whether this 15 min can be increased or not?

Sandip

Re: UPS Shutdown Time

Sandip Ghosh — Thu, 15 Aug 2002 19:34:32 GMT

Dave,

It is available from the UPS Data Sheet. And from that data sheet I can found that it can support 29 min with the specific amount of load.

Sandip

Re: UPS Shutdown Time

S.K. Chan — Thu, 15 Aug 2002 19:34:52 GMT

The thing is can you afford 15 minutes ? If you do "man ups_conf", basically 2 parameters are involved here ..
a)shutdown_delay_mins (default=1min)
b)shutdown_timeout_mins (default=5mins)
The "a)" is how much time to wait after the UPS kicks in before it tells ups_mond to run shutdown halt.
The "b)" is how much time to wait before actually power it down totally.
If you think your UPS can last for 15 mins, you can increase "a)" (by editing /etc/ups_conf) and just remember to restart ups_mond afterwards. There should be already an entry in /etc/inittab that respawns ups_mond. If that's the case just run ..
# init q
to restart ups_mond. Check the process to confirm.

Re: UPS Shutdown Time

Sajid_1 — Thu, 15 Aug 2002 19:40:36 GMT

hi Sandip,

The parameter value which I gave can be defined the ups_conf file. I don't think there is a documented max. limit for this parameter. If your UPS supports this much wait time, then you can change this parameter.

HTH

Re: UPS Shutdown Time

Sajid_1 — Thu, 15 Aug 2002 20:00:12 GMT

hi again:

This document explains it all:
http://support1.itrc.hp.com/service/cki/docDisplay.do?docLocale=en_US&docId=200000058669811

Doc ID - UUPSKBRC00008714

hth

Re: UPS Shutdown Time

Animesh Chakraborty — Fri, 16 Aug 2002 01:39:07 GMT

Hi Sandip,
It very easy if you do it using SAM
#sam >peripheral devices >UPS >action >modify global configuration.

But I have never tried to change it more than 15m.

Re: UPS Shutdown Time

Darren Prior — Fri, 16 Aug 2002 08:22:16 GMT

Hi Sandip,

I've always believed that the limit was 15 mins. Whilst looking for documentation to confirm this I read the patch text for the latest ups_mond patch for 10.20 (PHCO_24153.)

Have a read of the defect description section where it discusses the limits and refers to some UPS units where the limits are increased.

regards,

Darren.

Re: UPS Shutdown Time

Sandip Ghosh — Fri, 16 Aug 2002 17:33:32 GMT

Daren,

10 out of 10. I was exactly looking for this configuration detail.

Animesh,Sajid,SK,

I had read some where that those earlier PowerTrust UPS does not support more than 15 Min / 999 Sec battery backup, as described in the patch details. That's why I was so particular about that 15 Min.

Anyway my problem is solved now.

Sandip