nanog mailing list archives
Re: Never push the Big Red Button (New York City subway failure)
From: Adam Thompson <athompson () merlin mb ca>
Date: Wed, 15 Sep 2021 15:58:10 +0000
Now I'm curious... in all of the DCs and COs I've worked in - to the best of my knowledge, I haven't personally tested this! - the EPO button does not switch to emergency power. It turns off ALL equipment power in the space - no lights, no klaxons, nothing. In simpler setups, the EPO is connected to the UPS so anything plugged in to the UPS does dark instantly. In one DC I'm familiar with, the EPO switch kills all the UPS output and uses several relays to kill commercial power at the same time. In some, the room lights were not covered by the EPO switch, in some they were. Emergency exit lamps will continue to be lit, as they have internal batteries, and are required by building/fire code. Is it (somewhat) common for an EPO switch to only disconnect commercial power and leave local redundant power live? What sort of facilities would have this? -Adam Adam Thompson Consultant, Infrastructure Services [1593169877849] 100 - 135 Innovation Drive Winnipeg, MB, R3T 6A8 (204) 977-6824 or 1-800-430-6404 (MB only) athompson () merlin mb ca<mailto:athompson () merlin mb ca> www.merlin.mb.ca<http://www.merlin.mb.ca/> ________________________________ From: NANOG <nanog-bounces+athompson=merlin.mb.ca () nanog org> on behalf of Jay R. Ashworth <jra () baylink com> Sent: September 11, 2021 22:23 To: nanog <nanog () nanog org> Subject: Re: Never push the Big Red Button (New York City subway failure) ----- Original Message -----
From: "Sean Donelan" <sean () donelan com>
NEW YORK CITY TRANSIT RAIL CONTROL CENTER POWER OUTAGE ISSUE ON AUGUST 29, 2021 Key Findings September 8, 2021 https://www.governor.ny.gov/sites/default/files/2021-09/WSP_Key_Findings_Summary-for_release.pdf Key Findings [...] 3. Based on the electrical equipment log readings and the manufacturer’s official assessment, it was determined that the most likely cause of RCC shutdown was the “Emergency Power Off” button being manually activated.
I don't even *do* datacenter for a living, and I know that when you hit the Molly button, 1) A Klaxon goes off in the Data Center -- one that sounds *different* from the Halon Klaxon, in both cadence and tone (just for a couple bursts), and 2) Yellow rotating beacons turn on, and stay on while you're on Emergency Power. Yes, real honest-to-ghod *rotating mechanical beacons*, none of this flashing LED crap. Clearly, it's important that the use of Emergency Power be annoyingly noticeable. Cheers, -- jra -- Jay R. Ashworth Baylink jra () baylink com Designer The Things I Think RFC 2100 Ashworth & Associates http://www.bcp38.info 2000 Land Rover DII St Petersburg FL USA BCP38: Ask For It By Name! +1 727 647 1274
Current thread:
- Re: Never push the Big Red Button (New York City subway failure), (continued)
- Re: Never push the Big Red Button (New York City subway failure) William Herrin (Sep 15)
- Re: Never push the Big Red Button Stephen Satchell (Sep 15)
- Re: Never push the Big Red Button Keith Stokes (Sep 15)
- Re: Never push the Big Red Button Billy Croan (Sep 15)
- Re: Never push the Big Red Button Callan Banner (Sep 15)
- Re: Never push the Big Red Button Robert Taylor (Sep 16)
- Re: Never push the Big Red Button (New York City subway failure) Daniel Seagraves (Sep 15)
- Re: Never push the Big Red Button (New York City subway failure) Warren Kumari (Sep 10)
- Re: Never push the Big Red Button (New York City subway failure) Adam Thompson (Sep 15)
- Re: Never push the Big Red Button (New York City subway failure) Daniel Seagraves (Sep 15)
- Re: Never push the Big Red Button (New York City subway failure) William Herrin (Sep 15)
- Re: Never push the Big Red Button (New York City subway failure) Warren Kumari (Sep 15)
- Re: Never push the Big Red Button (New York City subway failure) bzs (Sep 15)
- Re: Never push the Big Red Button (New York City subway failure) Roy (Sep 15)
- Re: Never push the Big Red Button (New York City subway failure) richey goldberg (Sep 16)
- Re: Never push the Big Red Button (New York City subway failure) Sabri Berisha (Sep 15)