One more thing to watch out for at data centers - fire drills

Ken Chase math at
Sat Sep 17 18:12:20 UTC 2016

All of these discussions sounds infinitely safe for humans.

Servers and network gear is replaceable. Sounds like the failure was not one of
DC mismanagement but human safety errors.


On Sat, Sep 17, 2016 at 09:27:26AM -0400, hcb at said:
  >On 2016-09-17 08:39, Suresh Ramasubramanian wrote:
  >>Releasing inert gas from fire suppression units that were over
  >>pressurized resulted in an extremely loud noise ??? causing cabinets
  >>full of hard drives to vibrate ??? which got transmitted to the read ???
  >>write heads of the drives.
  >>Amazing sort of outage + data loss, and this time the physical
  >>security plant chief gets to write up the RCA.
  >Another unexpected result when we had an all-out Halon test:  thick fog,
  >apparently from cold gas and somewhat humid air. I'm glad to have been
  >watching through windows. Visibility in the room dropped to zero.

Ken Chase - math at Guelph Canada

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