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General Chat Thread, A challenge in General; In a discussion with a friend (a Data Centre Manager) about how different school servers can be from school to ...
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    GrumbleDook's Avatar
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    A challenge

    In a discussion with a friend (a Data Centre Manager) about how different school servers can be from school to school we hit on trying to see what a typical server room looked like, and whilst he enjoyed looking at the server room thread he wanted more quantifiable information ... so to settle a disagreement would folk care to answer the following?

    1. What type of school are you? (S - Secondary including Upper schools, P - Primary, M - Middle, J - Junior, I - Infants, N - Nursery, O - Other and please add SP if special provision or ALT for Alternative education such as PRU)
    2. How many learners do you have?
    3. Approx dimensions of your server room
    4. Is your server used for any other task (e.g. office, storage, etc)?
    5. Was your servers room a conversion (eg no - dedicated room, yes - previously a toilet)?
    6. How many Racks do you have?
    7. What make(s)?
    8. Dimensions (eg 19" x 42Ux 1200)
    9. How is your rack filled (e.g. 4U - UPS, 10U - servers, 5U - switches / routers, 4U - patch panels, 3U - Cable Management, 16U - spare / blank)
    10. How much power is available and drawn per rack (individual rack)?
    11. What is the BTU output of the equipment in your rack (individual rack)?
    12. What is the weight of your loaded rack?
    13. What is the max cooling load of your A/C (BTU/hr)



    If you don't know any of the answers then just say "Don't know" ...

  2. #2

    tmcd35's Avatar
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    1 - Secondary
    2 - 850
    3 - 2m x 4m (does that sound about right?)
    4 - Toner storage, Software, 2 filing cabinets of assorted stuff
    5 - Not sure, certainly a dedicated space now
    6 - 2
    7 - ?
    8 - Er, tall! floor standing, 19", probably 42U
    9 - Rack1 = 5-6U patch panels, 9U switches, 3U routers/servers, 6U UPS's, rest spare/blank
    Rack2 = 4U CCTV DVR, 1U KVM, 5U Servers, 6-8U UPS, rest spare/blank
    10 - Don't know
    11 - Don't know
    12 - Don't know
    13 - 2xA/C units - Don't Know specs

    (I may actually go look/measure and edit this post later - if I remember)

    Edit: I do have a 2U server sitting on top of the 2 filing cabinets (not sure I should be admitting to that, or the fact it's out main 4Tb storage array... )
    Last edited by tmcd35; 22nd November 2012 at 12:14 PM.

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    GrumbleDook (22nd November 2012)

  4. #3

    twin--turbo's Avatar
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    1) S
    2) 1100
    3) 6M*3M plus a 2M*2M alcove
    4) No (except some tonors)
    5) Built
    6) 5
    7) Excel
    8) 2x 19" x 42Ux 1000 / 2x 19" x 42U x 800
    9) Rack 1 Structured cabling and 1U switches
    Rack 2 2x4507 Cores , UPS, ASA, Firebox, Securus,
    Rack 3 UPS, Blade enclosure 5 1U Servers, 2 Lefthand Sans, 1 MSA, Tape Library. Etc...
    Rack 4 ComS circuits, voice router, call recorder, a few switches, Digital Signage server.
    Rack 5 UPS, 5 2U servers, KVM, Call manager Server, Voicemail Server, 2x NAS, SAN, etc...
    10) A work in progress , it was never correctly planned and quantified by the installers.
    11) See 10. we have 15Kw of cooling though
    12) Very Heavy, but it's solid ground floor. We have considerde this in a previous room and moved downstairs.
    13) See 11

    Rob

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    GrumbleDook (22nd November 2012)

  6. #4

    glennda's Avatar
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    This is for my previous school

    1. Secondary
    2. 1600
    3. 3 x 4
    4. no
    5. Yes built out of old store room.
    6. 3 (was 4)
    7. HP
    8. 19" 42U 1200
    9. rack 1 4U UPS - Rest Servers 4U San 1U Fiber Switch. Rack 2 - Switching and Patch panels Rack 3. Servers, KVM and routers. 1 x B500 free standing ups
    10. B500 is 3 phase 32 amp, APC SUA10000 - 32amp 3 phase
    11. not a clue
    12. A lot
    13. Don't know but had two large Daikin Air con units for the room kept at 19 degrees.

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  8. #5

    DaveP's Avatar
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    1. Secondary [Academy status acheived]
    2. 1200
    3. 2.6 x 3.2 x 3.1 [High ceilings!]
    4. Server: No other use. Server Room: Storage of old kit awaiting repair and new kit awaiting deployment.
    5. Don't know. It has always been a sever room while I have been here [9 years now]
    6. Two. One for switches, one for servers.
    7. Think one might be CISCO: It has lost all branding [Switches] The server one: Don't know.
    8. Server rack: 81" x 31" x 32" Switch rack: 23" x 26" x 53" [Exterior dimensions]
    9. Server rack: 16 port KVM, LT03 tape drive with two tape libraries, 5 SUN servers for offsite network access, 7 Dell servers, 2 HP servers, 1 UPS. Switch rack: 4 switches, various makes and numbers of ports, 6 Ethernet patch panels, 2 fibre media modules.
    10. Don't know.
    11. Don't know.
    12. No idea but HEAVY!
    13. Don't know: Can say that it is a Dakin Inverter.

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    GrumbleDook (22nd November 2012)

  10. #6

    twin--turbo's Avatar
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    With respect to (10)

    The design and install were poor.

    Insufficient outlets were specified , loadings not checked, etc. We battled to have it sorted but got nowhere. We are still neeedding to rectify this.

    As an example (and this is on our other site which came second!) they specified too few cabinets for the server room despite us asking them to provide rack diagrams to ensure the space.

    So after primary install they agree that there needs to be another rack to house equipment sitting on the floor. And it would need a UPS, and as such would need power.

    My colleauge "Z" rings me up. we will call the installer "X"

    Z: "Hi Rob, X have had a look in the ceeling and say there is a feed already there, so they can put in the extra UPS no problem"
    Me: "Realy? A Spare 32A? Bonus.."
    Z: "No, it's a 16A but X assure me it's fine"
    Me: "But the UPS is an APC RT6000 right?"
    Z: "Er, yeah... X say it's fine"
    Me: "But 6000VA will overload the Supply"
    Z: "Will it, they say that's how the other one is connected"
    Me: Spits and rants.
    Me: "Ask them to look on the back panel of the ups next to the incommer, look at the Rated supply. It's not 16A!!!!!"
    Me: "So they need to fix that one too!"




    Rob

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  12. #7

    twin--turbo's Avatar
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    With Respect to (11)

    Total heat output was calculated by "X" based on thermal output from device's . Obviously that is MAX output. Their calcs came in at under 7.5Kw

    So we run two 7.5kws for N+1

    Rob

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    GrumbleDook (22nd November 2012)

  14. #8

    twin--turbo's Avatar
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    Also..

    "X" put the structured cabinet on teh end of the run of cabinets. So there is a mass of cabling all running one way.





    Basicaly if we had planned it, then It would ahve been done a whole heap better.



    RANT OVER....

    Rob

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  16. #9

    tmcd35's Avatar
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    Quote Originally Posted by twin--turbo View Post
    With respect to (10)

    The design and install were poor.

    Insufficient outlets were specified , loadings not checked, etc. We battled to have it sorted but got nowhere. We are still neeedding to rectify this.


    Rob
    After last weeks fiasco I've got the Business Manager to agree to getting the wiring in our server room sorted. The UPS holding up the main switch and routers in Rack1 died. So I risked my life for the sake of the school and climbed behind the racks to re-wire direct into the mains. Now...

    I have no idea where the mains is coming from. We have 1 thick cable from a fused spur labled "servers" feeding the other rack. However in Rack 1 we do have 3 5-gang extension cables plugged into each other. Until the UPS failed and I rewired what I could, there where Y-splitter coming off of those and in once a Y-splitter off a Y-splitter, plugged in to a 5-gang extension, plugged in to a 5-gang extension.

    I thank the last NM for the mess that is Rack1 (both electric cabling and data cabling - mess!!!). Although I have, er, ignored the problem for the best part of four years (if it ain't broke for $dietys sake DONT TOUCH IT). I have a major re-wireing effort planned next summer. If the school hasn't burn't down before then...

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  18. #10


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    1. S
    2. 1750
    3. 16' x 10'
    4. No
    5. Yes, it was last used as a cupboard for drama but I don't know what it's original purpose was
    6. 4
    7. Compaq and some random racks
    8. 2x 19" x 42Ux 1200 1x19"x42U x 600 and 1x19"x24Ux600
    9. 1 has 10 home built servers. 1 has SAN and !BM Bladecentre. 1 has external network equipment 1 has internal network equipment (9 switches)
    10. 970W switches 2.6KW servers (rack 1). don't know about the other
    11. don't know
    12. don't know
    13. 32 metres cubed per min. Can't find BTU specs

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  20. #11

    AngryTechnician's Avatar
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    1. Primary (Prep)
    2. 510
    3. 250cm D x 220cm W x 280cm H
    4. No
    5. Conversion, previously one corner of open plan office
    6. 1
    7. Standard and Pochin Enclosure Systems
    8. 800 x 1000 42U
    9. 17U servers, 6U patch, 2U cable management, 8U switches/routers, 9U UPS = 0U spare!
    10. Available: 4800W, drawn 2000W approx.
    11. Unknown
    12. Unknown
    13. Unknown

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  22. #12
    mthomas08's Avatar
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    1.S
    2.1600
    3.Approx dimensions of your server room
    4.Yes, Technician+desk and storage - is also first room before our office.
    5.Yes was previously 1 small office + storage - wall setup for previous Head of ICT (when he was head of IT and ICT)
    6.2
    7.Dont know
    8.Dont know
    9.2X UPS, 10X Servers, 2X Switches

    Sorry couldnt tell you the rest. All I know is a seperate line was put in for power this year (power cuts/trips occuring everywhere) and we do have air con finally working fully in the room.

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  24. #13

    3s-gtech's Avatar
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    1. Secondary
    2. 850
    3. 3m width x 6m length x 3m height
    4. No
    5. Yes - built long before servers - probably a stroage area
    6. 2
    7. Dell
    8. 19" x 42U
    9. 1 is 4U UPS, 15U or so servers with a shelf for a Mac Mini etc, the rest blank. 2 is 11U of switches, 1U of router, 6U of patch panels, the rest blank.
    10. 1 is 2 x 3000VA UPSs, 50% and 10% load. 2 is 1 x 3000VA UPS, 10% load.
    11. Not a clue. Lots, still a few Netburst Xeons in there. Very little in the second rack.
    12. At a guess, 150Kg for the first rack, and 75Kg for the second. Solid concrete first floor.
    13. Again, not sure. Small unit, 9KW or so? Don't know how much heat it can deal with though.

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  26. #14

    bossman's Avatar
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    @GrumbleDook:

    1. S
    2. 750
    3. 4m x 2m
    4. No
    5. Yes – Store room
    6. 2
    7. APW and Cooper B-Line
    8. Both 19” 42U 1200s
    9. Cooper B-Line = 6 x 2U’s PSU, 8 x 2U’s Servers, 2 x 2U SAN’s, 1 x 2U backup disk box, 1 x 2U Quantum LT04 16 tape-loader, 2 x 1U cable tidies, 2 x 1U Gig switches, 1 x 1U KVM x 16 usb

    APW = 3 x 6U Servers, 3 x 2U UPS, lots more space to fill

    10. Cooper = 14w APW = 2.9w
    11. 25000 BTUs
    12. Just put me back out!!! Special non static floor covering over solid concrete.
    13. 40000 BTUs
    Last edited by bossman; 22nd November 2012 at 03:02 PM.

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  28. #15
    DSapseid's Avatar
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    1. S
    2. 557
    3. 5x4
    4. Small bit of storage and has my 44" large format printer in
    5. Yes 2 Store cupboards. One was taken over in 2003 the second and the server room double to present in 2011.
    6. 2
    7. Prism
    8. 19" 42U 1200
    9. Rack 1: 1U kvm, 8U UPS (i think), 33U servers (again i think! the rack is full!) Rack 2: 10U Switches, 6U Patch Panel, 8U Cable management, 3U county broadband stuff
    10. not a clue! UPS is 15kva and supplies both racks
    11. not a clue!
    12. Hate to think!! The UPS was 1/3 ton on its own!
    13. 2 x 7kw Daiken Units/

    edit: forgot to mention that rack 1 has 2U of patch panel in the back and rack 2 has 3 shelves on the back which have the mac mini and mac pegasus drive and enviromental monitoring etc on.
    Last edited by DSapseid; 22nd November 2012 at 03:07 PM.

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