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Physical Security Thread, Flood Protection in Technical; Hello Does anybody happen to know if there are any particular guidelines relating to the minimum height a server should ...
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    Bankesy's Avatar
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    Flood Protection

    Hello

    Does anybody happen to know if there are any particular guidelines relating to the minimum height a server should be raised off the ground?

    Just curious but thank you in advance if you have the answer.

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    elsiegee40's Avatar
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    I have never heard of any. It would depend on the geographical location of the building really. If you were in a riverside building in York, I would suggest 2 metres from street level. At the top of the hill where my school is, there is more danger from a leak through the ceiling than flood water.

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    FN-GM's Avatar
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    Something to keep in mind, you should rack stuff in a rack with the heaviest at the bottom. Lots of times these are servers.

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    School 1 servers on floor, building is on a hill and serverroom is highest point on hill, more likely to have a roof leak than flood, all switches and Cabinets are 7ft up the wall same for CCTV, Back up and UPS boxes.

    School 2: server room known to flood in heavy (monsoon) rain all servers are on 3ft stilts with all electrical and switch cabinets moved up above 6ft unfortunately its a broom cupboard and there's nowhere else to move it to, best thing we did was fit a sump pump that can remove 60ltrs a minute and an alarm if it's triggered. Most we've ever had in the cupboard has been 2 inches of water and hopefully new extension will see it all move soon.

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    Ours were on desk tops , meant they were about 70cm Above the high tide in our flood. We still went into work and moved them to the first floor for safety though.

    Now our server room is located in an area of the building where the floor level would probably be 70cm lower... And they are in racks so the UPS's and the bottom of the blade center could well have been a bit damp...

    Hopefully the flood defenses will prevent another flood.

    To Be reasonably safe.. Go for 1st Floor.

    Rob

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    twin--turbo's Avatar
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    It's difficult to imagine it can happen until you have had it 1st hand.....

    https://www.google.co.uk/search?q=20...w=1024&bih=574

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    Quote Originally Posted by Bankesy View Post
    Does anybody happen to know if there are any particular guidelines relating to the minimum height a server should be raised off the ground?
    There's a whole Wikipedia article on the design on raised floors for server rooms, suggesting a minimum of 15cm:

    Raised floor - Wikipedia, the free encyclopedia

    Most people's use for raised floor is to allow for wiring and possibly cooling vents to run underneath, although I bet Google and Facebook have a couple of designs for datacentres in flood-prone areas.

    From the point of view of putting the UPS at the bottom of the rack as it's the heaviest item, that makes sense, but bear in mind that it'll potentially be the first thing to get shorted out if there is a flood, quite possibly making any puddle around the bottom of your server rack live. I think there are some cirumstances where a UPS can start to emit noxious fumes, too - a flooded UPS might not be the kind of thing to approach.

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    Quote Originally Posted by dhicks View Post
    From the point of view of putting the UPS at the bottom of the rack as it's the heaviest item, that makes sense, but bear in mind that it'll potentially be the first thing to get shorted out if there is a flood, quite possibly making any puddle around the bottom of your server rack live. I think there are some cirumstances where a UPS can start to emit noxious fumes, too - a flooded UPS might not be the kind of thing to approach.
    That assumes you have a rackmount UPS. Our UPS for server room and switch rooms are whole room UPS's and do not actually sit in the server room.
    Last edited by FN-GM; 11th December 2013 at 08:37 PM.

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