RE: 165 Halsey recurring power issues

["Tony Wicks" <tony () wicks co nz>]

If you have been sold "redundant" power and the DC provider has connected both sides to one UPS in any form they are 
seriously amiss. You should not be expected to know the internal workings of the DC UPS systems and any talk of battery 
packs (unless you are getting 48v DC) is utterly irrelevant. This DC provider is, in my opinion is very much out of 
step with reality if they think this is some sort of normal practice.



-----Original Message-----
From: NANOG <nanog-bounces+tony=wicks.co.nz () nanog org> On Behalf Of Babak Pasdar
Sent: Tuesday, October 24, 2023 8:31 AM
To: James Jun <james.jun () towardex com>
Cc: nanog () nanog org
Subject: Re: 165 Halsey recurring power issues

Thanks James,

At signup we asked for N+1 power, two circuits to different UPS units. I think they sliced it thin by connecting us to 
two battery packs on the same UPS. When the UPS controller crashed both battery packs went down. Which now raises the 
question -- is it reasonable to have to specify and expect that two UPS units means that they do not share any common 
points of failure.

Is the UPS the battery or the battery and controller combined?

Babak