Raised Floors

Wayne S Wayne.Sudol at hotmail.com
Wed May 22 03:59:01 CDT 2019

Have to rephrase what i said about the Liebert units being water cooled. They used water for humidity control not for cooling. They used regular refrigerant for that.


> On May 22, 2019, at 1:50 AM, Wayne S <wayne.sudol at hotmail.com> wrote:
> PS.. Sorry about the top posting. I'm old and i forgot.
> Wayne
>> On May 22, 2019, at 1:45 AM, Wayne S <wayne.sudol at hotmail.com> wrote:
>> All true. Just sayin' that water can get into the DC even when it's not intended. 
>> When fighting a fire in another part of a structure, the water may find it's way into the DC.  
>> Not sure about not allowing water to get near a dc, can you explain that statement?
>> The 2 Liebert a/c units that cooled the DC were located inside the room and were water cooled so there was water around. I also remember the old IBM 3032 computers at my first site needed chilled water to operate so there was a lot of piped water going into the room. 
>> The FD did regular inspections and it didn't seem to bother them in either case.
>> Funny, but Halon is outlawed and having it around did seem to bother them. It was replaced with some other gas system that i can't remember the name.
>>> On May 22, 2019, at 12:43 AM, Jim Manley via cctalk <cctalk at classiccmp.org> wrote:
>>> No firefighter in their right mind is going to knowingly pump a drop of
>>> water anywhere near or in the direction of a data center, let alone into
>>> it.  That's why they're equipped with Halon or other oxygen displacement,
>>> cooling, and flame suppression systems, and the FDs are equipped with
>>> appropriate Class 2 (Electrical) firefighting equipment.  FDs conduct
>>> periodic inspections of all on-site fire-fighting equipment and the local
>>> station shifts do walk-throughs to review their procedures.  If any
>>> hazardous materials are present (guaranteed in a DC), they're also taken
>>> into account.
>>> The FDs that serve industrial sites are equipped to fight fires where the
>>> fuels can range from paper through plastics, up to actual petrochemical
>>> fuels.  I worked in the last semiconductor fab still operating in Silicon
>>> Valley and worked with the City of Santa Clara FD on their plans, which had
>>> to deal with the presence of extreme toxins and corrosives such as
>>> hydrofluoric acid used to etch silicon wafers. They used to be responsible
>>> for the Intel fab next door until it was shut down and the fab in
>>> Hillsboro, OR, took over all R&D production.  They said it was a nightmare
>>> waiting to happen because of the volume of extremely hazardous chemicals
>>> used on-site.
>>> Someone should be sued and go to prison for signing off on permits that
>>> would allow water to get anywhere near a DC - it's a violation of the
>>> National Electric Code, for starters.  If anyone sees something like that,
>>> it should be reported immediately, and not within the organization, since
>>> the facilities people are either incompetent or complicit in keeping quiet
>>> about it.  That's what anonymous.hotlines are for, and the media, if no
>>> action occurs with the hotlines - we're talking about the possibility of
>>> serious injury and death here.
>>> On Tue, May 21, 2019 at 11:12 PM Grant Taylor via cctalk <
>>> cctalk at classiccmp.org> wrote:
>>>>> On 5/21/19 5:33 PM, Craig Ruff via cctech wrote:
>>>>> The NCAR Wyoming Supercomputer Center has raised floors of about 20 feet.
>>>> Did the support posts go all the way down?  Or was there some sort of
>>>> grid work that supported the raised floor above an open area that
>>>> contained the PDUs?
>>>> I ask because the PDUs in the DC in my office are wider (and longer)
>>>> than a floor tile.  As such, it would require some special
>>>> accommodations if the support posts were 20 feet tall.
>>>> --
>>>> Grant. . . .
>>>> unix || die

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