Totally agree @billy, could've put it better myself. Though it's much more entertaining (and terrifying) to wince at the audible difference between just the hardware whirring to a silence, and all of the temp and humidity controls whirring to a halt with the hardware. The fear in the air is literally palpable, because it's immediately 90 degrees and your lungs cave.
On Wed, Sep 15, 2021 at 7:51 PM Billy Croan <bcr...@unrealservers.net> wrote: > Indeed. Few sounds in the data center haunt me quite as much as a > sensation that the decibel level has just decreased significantly. > > On Wed, Sep 15, 2021, 4:14 PM Keith Stokes <kei...@salonbiz.com> wrote: > >> The bigger thing to notice is the *lack* of noise as every server, switch >> and storage system spins down. >> >> --- >> >> Keith Stokes >> >> >> >> On Sep 15, 2021, at 3:50 PM, Stephen Satchell <l...@satchell.net> wrote: >> >> In the data centers I've worked in over the decades, those Big Red >> Buttons would activate a normally-closed contactor in a breaker panel. When >> pushed, the contactor would open, and turn off all the circults in said >> breaker panel. Not affected are lights, convenience outlets, door locks, >> and other non-data loads. Resetting the contactor to the working position >> was done after throwing all the breakers to the off position, and then turn >> on each breaker, one at a time. >> >> The only noise that I have ever heard when the Big Red Button was pushed >> was the loud BANG as the contactor operated. You hear a similar bang in >> movies in scenes where lights in a large area are turned on and off. >> >> Nothing like the BANG of a 600-amp 3-phase breaker tripping -- >> experienced that at University of Illinois Center for Advanced >> Computation. You immediately look for the person holding a gun. >> >> >>
