165 Halsey recurring power issues

[Babak Pasdar <babak () pasdar com>]

Hello,

I wanted to get some feedback as to what is considered standard A/B 
power setup when data centers sell redundant power.  It has always been 
my understanding that A/B power means individually unique and preferably 
alternate path connections to disparate UPS units.

A few months ago, 165 Halsey took us down for several hours. They 
claimed that a UPS failed causing this issue.  Our natural reaction was 
that we have A/B redundant power so a failed UPS on the A circuit should 
not take down the cabinet. Joe the facility manager claimed that 
industry standard A/B power means two circuits to the same UPS, which 
makes no sense to me.

They committed to move us to A/B power with redundant circuits to 
disparate UPS units.  However, we had a multi-hour outage again in that 
site this weekend. At first glance it seems to be the same problem.

We have checked with all of our other data center providers who have 
confirmed A/B power is in fact individually unique connections to 
disparate UPS units. 165 Halsey's definition of what constitutes 
redundant power seems unique. Why would anyone pay extra for a second 
connection to the same UPS?  However, I wanted to get feedback to see if 
I am taking crazy pills here 🙂

None-the-less, we have lost all confidence in this facility.

Best Regards,

Babak