If you are using hot/cold aisles and don't fill the rack, don't forget you have to put in blank panels.
-- Keith Stokes > On Oct 12, 2017, at 5:45 PM, William Herrin <b...@herrin.us> wrote: > > On Wed, Oct 11, 2017 at 8:31 AM, David Hubbard < > dhubb...@dino.hostasaurus.com> wrote: > >> Curious if anyone on here colo’s equipment at a Level 3 facility and has >> found the temperature unacceptably warm? I’m having that experience >> currently, where ambient temp is in the 80’s, but they tell me that’s >> perfectly fine because vented tiles have been placed in front of all >> equipment racks. > > > Hi David, > > The thing I'm not understanding in this thread is that the last time I > checked Level 3 was a premium player not a cost player. Has that changed? > > If a premium data center vendor is asking you to swallow 80F in the cold > aisle, something is very wrong. But realize I just said 80F in the *cold > aisle*. DC cooling is not about "ambient" or "sensible cooling" or similar > terms bandied about by ordinary HVAC professionals. In a data center, air > doesn't really stack up anywhere. It flows. > > If you haven't physically checked your racks, it's time to do that. There > are lots of reasons for high temps in the cabinet which aren't the DC's > fault. > > Is all the air flow in your cabinet correctly moving from the cold aisle to > the hot aisle? Even those side-venting Cisco switches? You're sure? If > you're looping air inside the cabinet, that's your fault. > > Have you or your rack neighbors exceeded the heat density that the DC's > HVAC system supports? If you have, the air in the hot aisle may be looping > over the top of the cabinets and back in to your servers. You can't > necessarily fill a cabinet with equipment. When you reach the allowable > heat density, you have to start filling the next cabinet. I've seen DC > cabinets left half empty for exactly this reason. > > Regards, > Bill Herrin > > > -- > William Herrin ................ her...@dirtside.com b...@herrin.us > Dirtside Systems ......... Web: <http://www.dirtside.com/>
