Server UPS Recommendations
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@scottalanmiller said:
The recommended design is two UPS, one for each rail. Each PSU goes into one rail, each rail into one UPS each UPS into as separate circuits as you can get.
What do you mean by "rail" here?
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@BRRABill said:
@scottalanmiller said:
The recommended design is two UPS, one for each rail. Each PSU goes into one rail, each rail into one UPS each UPS into as separate circuits as you can get.
What do you mean by "rail" here?
In this sense, rail means the left or right rear post of the server rack. A lot of server racks have a power bar going up and down the rails.
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@JaredBusch said:
In this sense, rail means the left or right rear post of the server rack. A lot of server racks have a power bar going up and down the rails.
Thanks.
We are all tower servers here.
The only rack we have here is an equipment rack.
Man, I need a road trip to some of the places you guys work.
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@JaredBusch said:
In this sense, rail means the left or right rear post of the server rack. A lot of server racks have a power bar going up and down the rails.
So, multiple servers could be plugged into each rail?
So @scottalanmiller is saying the recommended solution is to plug all server into one side of the rack (rail), and then that rail itself into a UPS?
That would seem hard to calculate the proper wattage unless the rack was full.
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@BRRABill said:
@JaredBusch said:
In this sense, rail means the left or right rear post of the server rack. A lot of server racks have a power bar going up and down the rails.
Thanks.
We are all tower servers here.
The only rack we have here is an equipment rack.
Man, I need a road trip to some of the places you guys work.
Most SMB do not have them. It is a term from Enterprise and colocation datacenters.
Since you have 2 power supplies in your servers, you plug PS1 into the left rial and PS2 into the right rail on all your hardware.
You plug the left rail into one UPS and the right rail into a different UPS. Then each UPS is also plugged into a different circuit. -
@BRRABill said:
@JaredBusch said:
In this sense, rail means the left or right rear post of the server rack. A lot of server racks have a power bar going up and down the rails.
So, multiple servers could be plugged into each rail?
So @scottalanmiller is saying the recommended solution is to plug all server into one side of the rack (rail), and then that rail itself into a UPS?
That would seem hard to calculate the proper wattage unless the rack was full.
Why would it be hard? You know that you plugged in 4 servers into each rail. Each PS is 500W. So each rail has 2kW.
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@BRRABill said:
Man, I need a road trip to some of the places you guys work.
You and me both, I think it'd be an eye opening experience for everyone
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@JaredBusch said:
Why would it be hard? You know that you plugged in 4 servers into each rail. Each PS is 500W. So each rail has 2kW.
Do you always have each rack pre-filled with servers?
I was thinking where you had 1 server or 2 in a rack. Do you buy capacity for now, or when the rack is filled?
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@MattSpeller said:
You and me both, I think it'd be an eye opening experience for everyone
I'm lucky that my wife (also in IT) has always worked in larger environments. So I get to see a lot of "the other side" in my little SOHO world.
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@BRRABill said:
@JaredBusch said:
Why would it be hard? You know that you plugged in 4 servers into each rail. Each PS is 500W. So each rail has 2kW.
Do you always have each rack pre-filled with servers?
I was thinking where you had 1 server or 2 in a rack. Do you buy capacity for now, or when the rack is filled?
You plan your capacity on what you have or realistically expect to get in the near term. always. You don't plan for some unknown future amount of servers.
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@BRRABill said:
@JaredBusch said:
Why would it be hard? You know that you plugged in 4 servers into each rail. Each PS is 500W. So each rail has 2kW.
Do you always have each rack pre-filled with servers?
I was thinking where you had 1 server or 2 in a rack. Do you buy capacity for now, or when the rack is filled?
For UPS it's best to talk to the business and see what their plans are. You know you need batteries for the things every 3 years and that's a good time to swap out if you need bigger (bigger being the only real reason to change UPS).
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@JaredBusch said:
You plan your capacity on what you have or realistically expect to get in the near term. always. You don't plan for some unknown future amount of servers.
I guess I was thinking the Enterprise folk were always welcoming new servers into the fold.
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@MattSpeller said:
@BRRABill said:
@JaredBusch said:
Why would it be hard? You know that you plugged in 4 servers into each rail. Each PS is 500W. So each rail has 2kW.
Do you always have each rack pre-filled with servers?
I was thinking where you had 1 server or 2 in a rack. Do you buy capacity for now, or when the rack is filled?
For UPS it's best to talk to the business and see what their plans are. You know you need batteries for the things every 3 years and that's a good time to swap out if you need bigger (bigger being the only real reason to change UPS).
Not just for UPS. this is always best advice. you never buy things for future. You buy for what you need and a realistic expectation of growth.
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@BRRABill said:
@JaredBusch said:
You plan your capacity on what you have or realistically expect to get in the near term. always. You don't plan for some unknown future amount of servers.
I guess I was thinking the Enterprise folk were always welcoming new servers into the fold.
I want to live in this fairy tale land of new equipment too lol we poor sods in small / charity environments get everyone else's used gubbins.
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@MattSpeller said:
I want to live in this fairy tale land of new equipment too lol we poor sods in small / charity environments get everyone else's used gubbins.
I bet my servers are older than yours!
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@BRRABill at one point we had nearly all ten year old servers
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@scottalanmiller said:
@BRRABill at one point we had nearly all ten year old servers
@scottalanmiller can still probably top this... But when I was at my last job we finally retired a server that had been in operation for 30 years.
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I've been working with @mdecamp to size up a UPS for my new DELL T320.
Turns out it never draws above 60W while running. These little suckers are efficient these days!
What would you need in this thing to get it to its full 495W potential?
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@BRRABill said:
What would you need in this thing to get it to its full 495W potential?
Fully loaded with RAM, Disk and a tape drive.
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Video cards
