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  1. #1
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    Extra deep racks

    Are providers adopting extra deep racks? the ones that are 120cm in depth? Those will be good way of stacking multiple devices on a single rackspace.
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    Quote Originally Posted by nokia3310 View Post
    Are providers adopting extra deep racks? the ones that are 120cm in depth?
    Yeah, quite a few.

    Quote Originally Posted by nokia3310 View Post
    Those will be good way of stacking multiple devices on a single rackspace.
    No, not for that.
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    Quote Originally Posted by CGotzmann View Post
    and how will this work in a hot row/cold row architecture?
    Hmm not sure what you mean by hot row/cold row..but i know hetzner have the extra deep racks for their newer rack deployments http://www.hetzner.de/en/hosting/produktmatrix/racks
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  5. #5
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    Quote Originally Posted by Steven F View Post
    No, not for that.
    What are the extra deep racks for then?
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    Quote Originally Posted by nokia3310 View Post
    What are the extra deep racks for then?
    There are larger chassis out there. Some come with cable management arms: http://www.quantaqct.com/en/01_produ...3&id=144&qs=96. There are reasons.
    Last edited by Steven F; 01-13-2014 at 11:11 PM.
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    Quote Originally Posted by nokia3310 View Post
    What are the extra deep racks for then?
    Long servers and other equipment, such as cable management arms, etc.

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    Quote Originally Posted by nokia3310 View Post
    Hmm not sure what you mean by hot row/cold row..but i know hetzner have the extra deep racks for their newer rack deployments http://www.hetzner.de/en/hosting/produktmatrix/racks
    Datacenters are setup in a particular manner for cooling. one side is providing cold air, one side is extracting hot air. You cannot have the rear of a server facing the cold row, nor can you have 2 chassis's blowing hot air into each other in the middle of the rack/cabinet unless you specifically have a datacenter cooling/ventilation setup to extract hot air from the middle top of a cabinet.

    Not only are they not going to let you do that, you would be sucking in HOT AIR from the HOT row into the machines on the back side of the cabinet.

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    Quote Originally Posted by Steven F View Post
    Deep chassis. Stuff like WRONG LINK. I could be wrong, I'm sure there is a place that would allow you to double stack.
    Well there is regular 80cm deep, deep 100cm deep and extra deep 120cm deep

    With the extra deep..one can stack a server and a switch/PDU on a 1U space..front and rear...a great feature for small colocation..like 2U-4U..where one can have ones switch and PDU.
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    Quote Originally Posted by nokia3310 View Post
    Well there is regular 80cm deep, deep 100cm deep and extra deep 120cm deep

    With the extra deep..one can stack a server and a switch/PDU on a 1U space..front and rear...a great feature for small colocation..like 2U-4U..where one can have ones switch and PDU.
    No one is going to let you double stack servers. Maybe stuff like Mac Minis, but not servers/switches/PDUs.
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    Quote Originally Posted by Steven F View Post
    No one is going to let you double stack servers. Maybe stuff like Mac Minis, but not servers/switches/PDUs.
    You'd be surprised.

    In one of the DC's I was in they had no extra rails on site so they used to put a single long server that had rails (a colo customers) and stack ontop of that for 6 - 8 U's.

    They had a real issue once when said customer wanted their server deracked >_> Thankfully (for them) the customer was remote and wasn't aware of that all.

    Francisco
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    Quote Originally Posted by DeltaAnime View Post
    You'd be surprised.

    In one of the DC's I was in they had no extra rails on site so they used to put a single long server that had rails (a colo customers) and stack ontop of that for 6 - 8 U's.

    They had a real issue once when said customer wanted their server deracked >_> Thankfully (for them) the customer was remote and wasn't aware of that all.

    Francisco
    wat. I guess people need to start asking for pictures. That's so absurd.
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    Quote Originally Posted by Steven F View Post
    wat. I guess people need to start asking for pictures. That's so absurd.
    The best one I saw was where they simply installed 2 bolts (one on each side) at the front to 'catch' the ears of the server and then had a solid 2U plate that was at the back to hold the back side. This setup was also stacked pretty high (again, 4 - 8 U's)

    Francisco
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    Quote Originally Posted by DeltaAnime View Post
    The best one I saw was where they simply installed 2 bolts (one on each side) at the front to 'catch' the ears of the server and then had a solid 2U plate that was at the back to hold the back side. This setup was also stacked pretty high (again, 4 - 8 U's)

    Francisco
    I've seen much worse, there was another Atlanta datacenter (which will remain nameless) that didn't use rails on their servers and instead used 2x4's to stack between the servers, it was like Jenga when techs needed to take equipment out of the racks. Talk about a fire hazard... lets keep kiln dried wood in the DC!

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    Quote Originally Posted by RyanD View Post
    I've seen much worse, there was another Atlanta datacenter (which will remain nameless) that didn't use rails on their servers and instead used 2x4's to stack between the servers, it was like Jenga when techs needed to take equipment out of the racks. Talk about a fire hazard... lets keep kiln dried wood in the DC!
    God forbid someone wants a RAM upgrade.

    That's hilarious.

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  16. #16
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    We use 1200mm deep racks where we can, the real advantage is having the ability to mount deeper equipment as well as more room for cable management and use 0U vertical power bars without compromising the back verticals.
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  17. #17
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    Quote Originally Posted by RyanD View Post
    <...> it was like Jenga when techs needed to take equipment out of the racks. <...>
    Hilarious! How is this possible without cooling problems. BTW, I like Jenga
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    Quote Originally Posted by Time4VPS View Post
    Hilarious! How is this possible without cooling problems. BTW, I like Jenga
    They could have used blanking panels.
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    Quote Originally Posted by Time4VPS View Post
    Hilarious! How is this possible without cooling problems. BTW, I like Jenga
    Wait, so people put two servers with their backs against each other into these "deep" racks?? I'm no data center engineer, but there's no way those servers would run efficiently with hot air being forced into them.
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  20. #20
    Some of the datacenters I have been in, i swear the "cold" aisle was 100+ degrees. Not sure how the servers weren't just failing

  21. #21
    We normally use 1050mm deep cabinets, but would love to be able to use 1200mm ones. We use Supermicro servers with rear drive access and the drive always hits the PDU in a 1050mm cabinet.

  22. #22
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    Quote Originally Posted by RyanD View Post
    I've seen much worse, there was another Atlanta datacenter (which will remain nameless) that didn't use rails on their servers and instead used 2x4's to stack between the servers, it was like Jenga when techs needed to take equipment out of the racks. Talk about a fire hazard... lets keep kiln dried wood in the DC!
    That's just wow...
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    Quote Originally Posted by techflyer View Post
    Some of the datacenters I have been in, i swear the "cold" aisle was 100+ degrees. Not sure how the servers weren't just failing
    You'd be surprised. Concerning hard drives, when Google did their large population HDD study, they found that failure rates did not begin to significantly increase until you hit 45 degrees Celsius or 113 degrees Fahrenheit: http://static.googleusercontent.com/...k_failures.pdf

    Of course those are SMART temps though--not ambient temps in the supposed cold aisle.
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  24. #24
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    Quote Originally Posted by DeltaAnime View Post
    The best one I saw was where they simply installed 2 bolts (one on each side) at the front to 'catch' the ears of the server and then had a solid 2U plate that was at the back to hold the back side. This setup was also stacked pretty high (again, 4 - 8 U's)

    Francisco
    I've seen worse. If you search my posts, you will find the provider . Servers without rails held up by hard drives. Broken floor tiles on a raised floor, consumer grade fans on-top of racks.

    It's truly amazing what happens behind closed doors at data centres. Thats why I always push for a tour of the faculty before sending any gear.
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  25. #25
    Deep racks accommodate deep equipment, zeroU PDU's and excess cabling... not back2back servers. That's an airflow nightmare unless you're using some of the new gear specifically designed for that purpose (microcloud hardware)

  26. #26
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    Quote Originally Posted by Quartet-Andrew View Post
    Servers without rails held up by hard drives. Broken floor tiles on a raised floor, consumer grade fans on-top of racks.
    If we wait long enough someone will post that darn pic of a server in a cardboard box again. I would, but I've lost the darn link.
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  27. #27
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    Quote Originally Posted by Quartet-Andrew View Post
    I've seen worse. If you search my posts, you will find the provider . Servers without rails held up by hard drives. Broken floor tiles on a raised floor, consumer grade fans on-top of racks.

    It's truly amazing what happens behind closed doors at data centres. Thats why I always push for a tour of the faculty before sending any gear.
    Given the state of the current data center, I can't even fathom this.

    I would think one would ALWAYS want a tour. Seems really nearsighted (even sans the details above) to buy colo without a tour.
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