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Wireless Networks Thread, ups in Technical; do people put there backbone switches on ups supply at moment we have server on there was thinking of adding ...
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    russdev's Avatar
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    ups

    do people put there backbone switches on ups supply at moment we have server on there was thinking of adding at least router and one of switches on so that it can notify me when there is a problem etc...

    russ

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    Re: ups

    Yup, but we did it to improve reliability - power round here goes down regularly.

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    Re: ups

    Yes, I have all our core switches on UPS in case of power failure. This allows me to recieve an email/sms to tell me about the problem. We host websites/media for various people and I need to know if there's going to be any downtime!

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    russdev's Avatar
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    Re: ups

    by bye

    how do you get ti to send sms

    russ

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    Re: ups

    Our sms supplier provides us with an email to sms gateway

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    russdev's Avatar
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    Re: ups

    git was hoping found some free way of doing it



    russ

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    russdev's Avatar
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    Re: ups

    thinking of getting a cheap ups for boxes etc what sort of pwoer does ups need for about 4 switches a router p;us few other bits

    russ

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    Re: ups

    Try the calculator on the APC site it does specific products or loads to tell you what UPS you need.

    http://www.apc.com/tools/ups_selecto...UPS%20Selector

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    Re: ups

    If you are feeling brave, check the power consumption of each unit (in Watts), add them all together. Then compare the result and the maximum running load of the UPS (usually quoted in VA).

    VA is slightly different from W so a 1500VA UPS and you have to use power factor corrections (which differ from device to device) The industry standard however is around 60% i believe.

    To safely spec a UPS, i would reccommend using the calculator above but if you must do it the hard way, multiply the wattage by 1.6 to give the size of the UPS required

    Switches pull 25-50W each, routers and adsl modems (small ones) pull around 20W each, rackmount probably pull some more. From the hardware you mentioned i would put them on a 1000VA unit for decent coverage and some room for expansion.

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    Re: ups

    Remeber if your using rackmounts + aircon you need some way of keeping the aircon going while the servers shut down. Due to the horrific power requirements of aircon that usually means a generator.

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    russdev's Avatar
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    Re: ups

    arcon whats that

    russ

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    Re: ups

    We have 4 beige SmartUPS 700s at the moment powering our main servers, which will soon be replaced with a huge rackmount UPS for all of them Then we will distribute the small UPSs around the switches.

    When/If we get the money 8O

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    Re: ups

    Quote Originally Posted by Geoff
    Remeber if your using rackmounts + aircon you need some way of keeping the aircon going while the servers shut down. Due to the horrific power requirements of aircon that usually means a generator.
    True, but for the short amount of time you want to keep the systems up for, it shouldnt be a problem(ie 5-10 mins).

    Also i wouldnt rely on the UPS to keep the systems up for more than a minimal amount of time, id more look at them for power conditioning (ie brownout and overvolt protection) and to perform graceful shutdowns.

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    Re: ups

    [topic moved to networks board - tarquel]


    ...and I have all servers UPS'ed [hehe] and have the main cur switch on a ups - admin switches will have UPS' on them as they will be POE ones and will have the ....*holds breath*....phone system on them.

    Hopefully in time, the trend will carry on throughout all the switches - to protect the switches more than anything else lol

    Nath.

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    Re: ups

    Quote Originally Posted by E1uSiV3
    Quote Originally Posted by Geoff
    Remeber if your using rackmounts + aircon you need some way of keeping the aircon going while the servers shut down. Due to the horrific power requirements of aircon that usually means a generator.
    True, but for the short amount of time you want to keep the systems up for, it shouldnt be a problem(ie 5-10 mins).
    Indeed. However a melted rack isn't something I'd personally want to risk.

    Quote Originally Posted by E1uSiV3
    Also i wouldnt rely on the UPS to keep the systems up for more than a minimal amount of time, id more look at them for power conditioning (ie brownout and overvolt protection) and to perform graceful shutdowns.
    Indeed. Thats the point of a UPS. The rules change slightly if you have a diesel generator though becuase you need to keep everything up on UPS for long enough to get the diesel generator online.

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