On Tue, 2007-09-25 at 10:36 +0100, paul at clubi.ie wrote:
> My (old and redundant) APC (1600 something, from about 6 years ago
> uses a normal serial cable at least.
My APC smartUPS uses a standard serial cable
Our 5KVA smart UPS in or NOC uses a serial cable or can take a nice (&
expensive!) management card that speaks Ethernet.
The management card fits into any of the smart UPS range
> One thing to bear in mind with UPSes is that batteries need replacing
> about every two years,
All the ups units I have ever seen have a test feature which allows you
to test the state of the batteries and usually the 70% runtime
Good batteries in a UPS that does not get run to completely empty (Full
discharge is very hard on lead acid batteries ) should last 3 to 5
years. perhaps even a little longer if the UPS does not run hot and get
called upon very often.
Not only will it protect your data but it will also extend the battery
life of the UPS battery if the computers are configured to shut down
well before the UPS runs out.
You can buy replacements from the vendor but you will most likely save
considerable money by buying proper branded batteries (Yuasa or
Panasonic are good choices) elsewhere. Buy from a vendor that has a high
turnover, Lead acid batteries do not like sitting on shelves for long
periods of time.
I have used www.chip.ie in the past
> which requires an outage on any remotely
> affordable UPS.
Hmm, I have never used a UPS yet that would not allow me to replace the
batteries whilst the computers were still running but then I have never
used one that cost (somebody) less than 100 Euro either.
It's amazing the number of good UPS units that get thrown out because
someone can't be bothered to change the battery
> I found that the Irish electricity supply's outage rate (at least in
> the Leixlip area) isn't appreciably more than that of a UPS (indeed,
> it might be better)...
Good for you, it's way worse around here that's for sure and I am
considering putting parts of the house on a Diesel generator with a
manual Transfer switch. No electricity gets a bit tiresome on Day 2
.brendan
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