[Date Prev][Date Next] [Thread Prev][Thread Next] [Date Index] [Thread Index]

Re: [Summary] UPS anyone?



Peter S Galbraith <GalbraithP@dfo-mpo.gc.ca> writes:
[snip]
> Unresolved questions:
> 
>  - What do we get for smart mode?  I presume more info about the
>    state of the UPS and the line condition gets to the user
>    software.  But can the Linux software display it?

If you get the APC Back-UPS pro and use apcupsd in smart mode it
can. The main advantage is that it can get an estimate of how long
your system can run on the battery from the UPS. In dumb mode most of
the UPS software immediately shuts down a system when a power outage
is detected. In smart mode, with the right software, the system will
stay up until the battery gets low.

Here's the output of "apcaccess status" on my system (apcaccess is
part of the apcupsd package):

APC      : Aug 17 11:21:25
CABLE    : APC Cable 940-0095A
UPSMODEL : BACK-UPS PRO 650
UPSMODE  : Net Master
SHARE    : NetworkUPS
UPSNAME  : 
ULINE    : 118.0 Volts
MLINE    : 118.0 Volts
NLINE    : 118.0 Volts
FLINE    : 60.0 Hz
VOUTP    : 118.0 Volts
LOUTP    : 042.9 Load Capacity
BOUTP    : 13.8 Volts
BCHAR    : 100.0 Batt. Charge
TIME     : 18.0 Minutes
SENSE    : HIGH
WAKEUP   : 060 Cycles
SLEEP    : 020 Cycles
LOTRANS  : 002.0 Volts
HITRANS  : 002.0 Volts
CHARGE   : 003.0 Percent
BFAIL    : 0x08 Status Flag
ALARM    : Always
LASTEVNT : SELF TEST
LOWBATT  : 02 Minutes

So, my system can run for an estimated 18 minutes if the power
fails. I have it set so that a shutdown will be performed when either
BCHAR drops below 10% or TIME drops below 10 minutes (this is
something you can configure yourself).

The other quantities that are neat to know about, but not critical,
are the maximum, minimum and current line voltages (MLINE, NLINE and
ULINE, respectively), and the load capacity (LOUTP). Again, it's
interesting to see these values, but not really a necessity to save
your system when the power goes out.

Gary


Reply to: