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26 votes

Plugging in a server rack with UPSes into a room that has its own UPS backup issues

Your typical UPS (i.e., excluding a double-conversion UPS), including all APC SmartUPS that I've worked with in the past, does nothing to the power except when running on batteries. It will draw a ...
manassehkatz-Moving 2 Codidact's user avatar
23 votes

Plugging in a server rack with UPSes into a room that has its own UPS backup issues

Every data center/server room I've ever been in and worked in, that had its own UPS system, has prohibited customers, clients, etc. from using their own UPS systems. I can't speak to power harmonics, ...
joeqwerty's user avatar
  • 111k
8 votes

How to decrease humidity level in a server room

I heard that using a dehumidifier can cause static charge buildup in the room. Then the server room was designed by an idiot. ANY server room I have seen in the last 30 years had the racks and (this, ...
TomTom's user avatar
  • 52k
8 votes
Accepted

How to decrease humidity level in a server room

humidity level inside the room is far from the ideal. That depends. "Ideal" usually means 0%, as no water based corrosion will be possible at all. Of-the-shelf servers, switches and ...
bjoster's user avatar
  • 4,927
8 votes

Plugging in a server rack with UPSes into a room that has its own UPS backup issues

Fire safety. The datacenter operators should be able to kill the power to the room, should an emergency happen. Your UPS units are outside of their control. Batteries themselves are dangerous. A ...
fraxinus's user avatar
  • 624
6 votes

Difference and compatibility between IBM, Dell, HP server rails

Rackmount servers come with rails intended for that equipment. The rails are generally unique to the server model and manufacturer. It IS possible to buy generic universal rails, but there isn't a ...
ewwhite's user avatar
  • 198k
6 votes
Accepted

In a 42U server rack with 12 very hot 2U-nodes, what is a good configuration? All nodes at the top or bottom?

This really shouldn't matter at all if your HVAC system is capable of handling your servers' thermal output.
MDMarra's user avatar
  • 101k
6 votes

Is there a best placement of hot hardware in a rack to maximize convection cooling for the whole rack?

Basic physics: you will get the most cooling by putting the hottest units at the top and the coolest at the bottom (assuming cold air is entering at the bottom and hot air leaving at the top). ...
fixer1234's user avatar
  • 161
6 votes

Plugging in a server rack with UPSes into a room that has its own UPS backup issues

Aside from the practical problems, most UPS manufacturers, including APC advise you not to do it and it will void your warranty. Additionally, using equipment not as designed may violate local ...
richardb's user avatar
  • 1,256
5 votes

Can any standard rack server or enclosure be mounted on sliding rails?

Short answer: It depends. Long answer: This is going to vary a lot from one chassis/enclosure to the next or even from one sub-model of enclosure to the next. Questions you need to consider: Are ...
rg6's user avatar
  • 195
5 votes
Accepted

Can any standard rack server or enclosure be mounted on sliding rails?

Rail kits tend to be specific to the type of enclosure you're getting, since while the holes on the rack mounting post are standardized, the method of fastening rails to the case is not. What you may ...
Per von Zweigbergk's user avatar
5 votes

Is it possible to place your own equipment with AWS/GCE/Azure?

No, this is not possible. There are some instances where GCP/AWS/Azure will give access to some bare-metal services, they will not allow you to place your own equipment in their datacenters. Most ...
Ken W - Zero Networks's user avatar
4 votes
Accepted

What kind of server rack is this? (Type and possible manufacturer)

iStarUSA WO22AB 22U 4 Post Open Frame Rack Link to site here
Shayban's user avatar
  • 56
4 votes
Accepted

What is the name for the pieces of metal in a rack that cage nuts are installed into?

Mounting Flange. It's defined in "EIA-310-D, Cabinets, Racks, Panels, and Associated Equipment". It may not be easy to find a legitimately free (the EIA charges for it) copy online, but you can find ...
Brandon Xavier's user avatar
4 votes

Cable management in cabinet and between cabinets

This depends on your environment and needs. Ideally, networking would be in a 2-post relay rack and servers in a 4-post rack. But if you're in a co-location facility, that may not be an option. ...
ewwhite's user avatar
  • 198k
4 votes

Difference and compatibility between IBM, Dell, HP server rails

In my experience, it's not possible to use rack mounts from different vendors on different machines. There may be some system where where generic cases are used, and thus, generic rails are available....
Stese's user avatar
  • 274
4 votes

Is there a best placement of hot hardware in a rack to maximize convection cooling for the whole rack?

Real racks arn't designed around natural convection based cooling. Any such assumption is bad. You'd have air trapped inside the case and more heat from any units below, and it will all melt down ...
Journeyman Geek's user avatar
3 votes
Accepted

Are Rack-Servers always loud?

Yep, these are always loud. Fans may go slower if the temperature's cold enough. Even though, you'll always ear it. Even with a couple closed doors in the way, ... In addition to the noise, you ...
SYN's user avatar
  • 1,794
3 votes

Difference and compatibility between IBM, Dell, HP server rails

The server/system manufacturer supplies the rails that fit to their equipment. There is no universal standard in that regard. Rail kits from one product line may not even fit another product line ...
HBruijn's user avatar
  • 80.6k
3 votes

What is "Node Composing" in Intel RSD?

In my opinion, "Node Composing" in intelRSD is not real virtualization. As mentioned in "pod-manager-api-specification": Currently a user can request allocation of a single node with a single ...
zhlicen's user avatar
  • 131
3 votes

What is the name for the pieces of metal in a rack that cage nuts are installed into?

I've never heard a specific name for only that exact part of the rack. Like @joeqwerty said, usually it's just called the post. A standard server rack is called a "4-post rack", and there are "2-...
Paul Gear's user avatar
  • 4,507
3 votes
Accepted

How compatible are rack-mount server rails across different manufacturers?

In my experience, they aren't standardized, even within the same brand of chassis. Save yourself a lot of pain and research the exact rails you need and buy those exact ones. I'm a big fan of tool-...
toppledwagon's user avatar
  • 4,265
3 votes

How to decrease humidity level in a server room

You need to add heat to the server room. Enough heat to make the A/C work harder to maintain your set temperature, but not so much heat that the temperature rises above the desired range. A well-...
MTA's user avatar
  • 131
3 votes
Accepted

Will 'Desktop' RAM work in a Rack Server?

Yes, it will. ASSUMING IT FITS - and given that pretty much any rack server is using a different standard than desktop machines, the answer is.... most likely not. And the detailed answer is: Read the ...
TomTom's user avatar
  • 52k
2 votes
Accepted

Rack PDU with IP control and surge protection

There are a whole lot of "it depends" on this one. In most cases involving a managed PDU, suppression is handled upstream somewhere. If you are in a colo I would recommend talking to their power ...
Paul Doom's user avatar
  • 841
2 votes

Rack Power Draw Reliability

Your Director was correct 10 years ago. (maybe reword that 3rd paragraph) Now a days (do a google image search) a modern PSU's are ALOT more efficient at low loads than older PSUs. Speaking of the ...
sirmonkey's user avatar
2 votes

Choosing the correct server rack width

We tend to use the 800mm wide ones for network and fibre-channel switches to accommodate the extra cabling requirements and then use 600mm ones for servers/storage etc. where the cabling tends to be ...
Chopper3's user avatar
  • 102k
2 votes
Accepted

How is air-flow designed in closed racks?

Such rack with limited airflow are usually done for industry where the environnement are hostile, such as production server in a not closed room. (SCADA system in example) As usually the industry got ...
yagmoth555's user avatar
  • 17.2k
2 votes
Accepted

Can an OS utilize all 4 nodes (4 x 2(22 core) CPUs=176 cores) in a server rack like C6320?

They will be 4 independent servers needing to run a separate OS each.
Sven's user avatar
  • 99.6k
2 votes

Message from application: cannot load such file -- puppet/util/command_line (LoadError)

use irb command, after input $LOAD_PATH check your load path, it seems you have the version problems, e.g. your puppet version and ruby version not compatible # irb irb(main):001:0> $LOAD_PATH =&...
Yu Jiaao's user avatar
  • 121

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