3 ms·
despite best efforts, sometimes the generators don't kick in. sometimes not all of them kick in. sometimes one ATS in one feed in one section that just happens
by pyvpx 10y ago
despite best efforts, sometimes the generators don't kick in. sometimes not all of them kick in. sometimes one ATS in one feed in one section that just happens to house one half of an important switch chassis doesn't work as it did during tests last quarter.
- snowy 10y agoTrue. But Data centers usually have an A and B power systems independent of each other for redundancy . Equipment is usually connected to both. The failure of either should not cause an outage. (Unless some one is stupid enough to connect core network equipment to only A or B power)
- marcusr 10y agoSometimes only A power or B power is delivered to the rack (otherwise you could receive different phases). Power failures also occur sometimes when the issue is on the wrong side of where power is distributed - we've lost power to our servers when maintenance has gone wrong for example.
- snowy 10y agoFrom my point of view if you end up with mission critical equipment connected only to A or B power then its engineered wrong.
- edwhitesell 10y agoVery true, but sometimes this happens at fault of the facility, not the affected company. I've been in a facility experiencing widespread power issues because customers were incorrectly delivered A+A or B+B power, instead of A+B.
- Aloha 10y agoThis is why I'm a proponent battery floated of DC Power for mission critical systems.
- chrishacken 10y agoExactly. You can only test for these scenarios to a certain extent and even when everything works as expected during tests, things still tend to break during production when shit hits the fan.