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List:       apcupsd-users
Subject:    Re: [Apcupsd-users] Logic Problem when using pcnet
From:       Dennis Golden <dgolden () golden-consulting ! com>
Date:       2011-11-01 18:43:10
Message-ID: 4EB03DBE.4080800 () golden-consulting ! com
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On 11/01/2011 11:35 AM, Adam Kropelin wrote:
> On Tue, Nov 1, 2011 at 11:10 AM, Dennis Golden
> <dgolden@golden-consulting.com>  wrote:
>> Hi,
>>
>> I'm running apcupsd on openSUSE 11.4 with an IBM UPS1500TLV UPS and the
>> APC9617 network management card. The firmware is v3.7.3 (aos) and v3.7.2
>> (sumx).
>>
>> The current shutdown sequence is to shut the machine down and issue the
>> powerdown to the UPS as the LAST thing in the shutdown sequence. The
>> problem with this, is that there is at least a two minute window, where
>> if the power is restored, the UPS will never power back on. In fact, if
>> the power is restored any time after shutdown is started AND before the
>> powerdown sequence is started on the UPS, the UPS will power off and
>> never power back on; therefore the system will never power back up.
>>
>> I would appreciate any comments.
>
> This is a common question.
>
> Some APC UPS models are smart enough to power off
> briefly-but-not-too-briefly when issued the killpower command, even
> when utility power has been restored. This effectively resets the
> server and it boots up again happily. Many other models simply ignore
> the command which leads to the scenario you describe. There are a
> number of (undocumented) UPS shut down commands. It is possible that
> apcupsd could issue a different one and get the momentary-power-off
> behavior on more UPS models. Sadly this will take a great deal of time
> to figure out, so I haven't done that analysis yet.

Adam,

If there is anything I can do, please let me know

Dennis
-- 
Dennis Golden
Golden Consulting Services, Inc.

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