On Sun, Apr 6, 2025 at 12:37 PM Frank Bures <buresf@xxxxxxxxx> wrote:
On 2025-04-06 06:11, Tim via users wrote:
>
> ToddAndMargo:
>> I called out an APC BX1500M. It has been in place all this time.
>
> Is everything on the UPS, computer and hub?
>
> I'd also check all plugs and sockets are firm.
I once had an APC UPS and a server combination that was causing the server
to spontaneously reboot itself. The UPS worked perfectly with any other
machine and the server never spontaneously rebooted with any other UPS. Go
figure. Probably an oversensitivity of the server's PSU to a
non-sinusoidal waveshape of the UPS's output.
Early APC stuff was very good, but then they went thru a bad patch.
I've seen a few cases where systems running close to the capacity of the UPS
would crash.
We were given use of a server with a 750 watt PS that had been used in a number-crunching
project. We connected it to 1400 KVA Ferrups UPS, but it would sometimes fail to boot. The
numerical code was still installed, and at boot fired up at full speed on all CPU's before
it throttled down (thermal constraints?).
George N. White III
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