Mailinglist Archive: opensuse (3506 mails)
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Re: [SLE] SUSE = Ubuntu? (now power consumption)
- From: Roger Oberholtzer <roger@xxxxxx>
- Date: Thu, 21 Sep 2006 18:16:51 +0000 (UTC)
- Message-id: <1158862628.4095.24.camel@xxxxxxxxxxxxx>
On Thu, 2006-09-21 at 17:02 +0200, Sandy Drobic wrote:
> I heard the same screams in our company from my boss when the electrician
> told him our ups was underpowered (he assumed 400W each server). We now
> have a few servers more in the rack and the ups load is still safe at
> about 57%.
Is it a non-switching UPS? Meaning that the equipment runs off the
batteries all the time? If so, your UPS will last longer if the load is
more than 57%. Otherwise, the batteries lose their charge capacity and
will last a shorter time when power fails. We use UPS in road vehicles
and have found this to be true. Our UPS suppliers have all said the same
thing. An over-dimensioned UPS' batteries do not last as long. Same
thing with petrol power generators. They last longer if the current
taken is closer to their rated power capacity.
--
Roger Oberholtzer
> I heard the same screams in our company from my boss when the electrician
> told him our ups was underpowered (he assumed 400W each server). We now
> have a few servers more in the rack and the ups load is still safe at
> about 57%.
Is it a non-switching UPS? Meaning that the equipment runs off the
batteries all the time? If so, your UPS will last longer if the load is
more than 57%. Otherwise, the batteries lose their charge capacity and
will last a shorter time when power fails. We use UPS in road vehicles
and have found this to be true. Our UPS suppliers have all said the same
thing. An over-dimensioned UPS' batteries do not last as long. Same
thing with petrol power generators. They last longer if the current
taken is closer to their rated power capacity.
--
Roger Oberholtzer
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