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Where Density, Square Meters, and Practicality Meet

Posted by RJ Tee on Aug 3, 2017 11:46:06 AM


In this recent article on Data Center Knowledge, the author discusses the growing issue of data center real estate in Singapore and other APAC markets – or more accurately, the lack thereof.

While many countries, including portions of the United States and Northern Europe, benefit from large land masses, high-density city centers in most of the world place an absolute premium on every square meter of space.  In these areas, data center facilities are built more on the vertical axis, with support equipment stacked on roof tops and in basements.

This situation is analogous to the topography of the data center itself.

If you imagine the data center floor as a business and each hot and cold aisle its bustling streets, then each cabinet is its own version of the OCBC Centre in Singapore or the Petronas Towers in Kuala Lampur.  Space is at a premium, and the rent is steep for each server and storage device housed inside. 

So, wouldn’t you need to optimize the rack PDU in the same way?  Luckily, Server Technology has done just that.

To support high-equipment densities and the number of power cords that come with it, Server Technology has found a way to increase the number of C13 and C19 receptacles you pack into a tiny space by 20%.  Dubbed HDOT, or High Density Outlet Technology, our engineers have discovered a way to optimize the footprint of the PDU without giving up any ground.  


Here’s a great video that shows how it all comes together to maximize your real estate.  And it is available in bespoke configurations as well.  That’s ‘customized’ for those of you in the western hemisphere. 

Configure Your HDOT PDU

To learn more about how Server Technology can improve the density of your rack-based power distribution strategy,  click here.

Topics: HDOT, density

Don't Let Cooling Costs Burn Your Dollars

Posted by RJ Tee on May 17, 2017 1:05:36 PM


Server Technology product manager Robert Faulkner knows a thing or two about data center power. With nine years at the company under his belt, Faulkner is keenly aware of the problems presented when you’re trying to walk that fine line between properly cooling your data center floor and keeping your costs low.

The problem, as he explains it, is like this:

“As temperatures rise, the life of your equipment drops. Most of your money is in servers, network gear and storage, so you want to make sure these elements have proper cooling,” Faulkner says.  (You can learn about top tools used for environmental montoring here)

Faulkner explains that with power strips residing in the back of the rack, the heat produced by servers is not always accounted for. One solution, he says, is proper cable routing.

“If you have a lot of cordage in the back, that’s a horrible situation,” he says. “The fan can’t cool the server. It’s just spinning, it’s really hot and it’s damaging your equipment.”

As a result, many data center managers assume their cooling is working efficiently, when it’s really burning up dollars by the minute.

The answer, Faulkner says, is to adopt smart rack PDU technology, such as the Alt-Phase HDOT PDU from Server Technology.

The benefits are many:

  • HDOT PDUs allow for shorter, more simplified cable runs
  • Increased airflow through the equipment
  • Intelligent rack PDUs report on current draws
  • Complete compatibility with Sentry Power Manager

Server Technology’s High Density Outlet Technology PDUs simultaneously monitor both power consumption and temperature within cabinets. Built-in alerts and reporting functions transmit data to HVAC systems, DCIM tools and key personnel. And in keeping with current trends, HDOT PDUs are built to operate at full power load in a 65 ̊C (149 ̊ F) environment, allowing you to run your data center at a warmer ambient temperature.

When combined with SPM, Server Technology’s smart rack PDUs become exponentially more powerful. SPM allows you to see in real-time what’s going on with your data center equipment. With optional temperature and humidity probes, you can maintain the proper cooling and heating mix on your floor 24/7. Customizable reports let you regularly see temperature data, allowing you even predict when equipment may be about to fail.

Learn more about  Server Technology’s alt-phase HDOT PDUs and sign up for a free 120-day Sentry Power Manager trial here.

Click Here To Build Your Own HDOT PDU  with Alt-Phase and POPS

Topics: HDOT, environmental monitoring

Three Questions to Ask About Three Phase Power Distribution

Posted by RJ Tee on Mar 10, 2017 9:30:24 AM

Across the globe, data center managers are making the move to 60A service at the rack level. Why? One big reason is because it better supports higher-density applications. As a result, three-phase power distribution is seeing a boost in popularity. Put simply, it just makes sense for data centers from economic and efficiency standpoints.

A popular choice for those looking to make the move to alternating phase power is the HDOT Switched power distribution unit from Server Technology. These rack-mount PDUs simplify time consuming processes such as cable management and load balancing. Offering up to a 30 percent footprint reduction, HDOT PDUs let you install more servers per rack and create a much more efficient flow over standard one- or two-phase power by using three-phase power distribution.

As you weigh your options for power distribution solutions, it’s crucial to ask all the right questions. In particular, you should train your focus on the issues of load balancing, its impact on power bills and related power loss.

Questions to ask when considering three-phase power distribution:

  1. Are my phases properly balanced? If all three phases aren’t correctly balanced, more heat will be generated. This leads to higher cooling costs.
  2. What’s the impact on my power bill? When loads are unbalanced, inefficiency follows, and so do skyrocketing power bills.
  3. Am I running too high of a load on my single phases? This is a risky approach and can result in tripped PDUs and upstream breakers. This leads to power loss at the rack level.

Opting for a switched rack-mount PDU from Server Technology can help alleviate the potential problems of a single- or two-phase load by distributing alternate phased power on a per-outlet basis rather than per branch. And, when you choose an HDOT unit, you’re getting the highest outlet count in the most compact form factor on the market.

As densities and power in the racks continue to grow, and as data center managers install more and more gear in the cabinets, it’s no secret power requirements are also rising. With an HDOT Switched rack PDU in your corner, you’ll not only survive, but thrive when it comes to efficiency and savings.

Topics: HDOT, Alternating phase, HDOT Switched, three phase power

Low on Real Estate, High on Rack Components?

Posted by Josh Schaap on Dec 5, 2016 8:40:22 AM


Forget about that row of coveted window offices…the hottest real estate in your building right now can be found in the back of your data center’s racks!

Why is the back of the rack so valuable? This seemingly insignificant space can make or break your data center densification strategy.

Here’s how:

Space is very limited in the back of the rack, which makes it difficult to tinker with rack densities. After all, you can only fit so many servers into standard 42U cabinets. And space becomes even more constricted when factoring in room for cooling, power cords and bulky power distribution units (PDU).

In order to safely maximize space in the rack, you need PDUs that are not only ultra- skinny, but which are also reliable and capable of powering all of the various components in your racks.

You need High Density Outlet Technology (HDOT) PDUs from Server Technology, which can support more rack components than any other PDU per form factor.

To combat the limited physical space that PDUs compete for in the data center rack, Server Technology developed High Density Outlet Technology (HDOT), the smallest form factor PDU which significantly increases real estate in the back of the rack by fitting as many as 42 C13’s in a 42U high network managed PDU device—that’s over 20 percent smaller than a comparable PDU using standard outlets. In conjunction with the launch of HDOT, Server Technology developed a quick turn manufacturing process that provides short lead times for PDU’s with the exact combination of C19 and C13 outlets in the locations where the customer needs them. The HDOT design also provides high native cord retention of over 12 pounds pull strength, reducing or eliminating the need for custom and costly ancillary locking cord devices. With increasing outlet density comes increased power, and potentially increased heat. HDOT is manufactured with robust high-temperature materials carrying a UL94 V-0 flame rating, making these outlets ideally suited for the harshest data center environments

Here’s the great part:

HDOT PDUs can save you more than just rack space. They will also save your company money, and spare you headaches with Per Outlet Power Sensing (POPS). Our latest addition to the HDOT product line is Per Outlet Power Sensing (POPS), which provides +/-1% billable-grade accuracy for energy consumption at each outlet for typical data center equipment loads. POPS also includes current, voltage, active power, apparent power, power factor, and crest factor at each outlet. This provides the ultimate in efficiency and capacity analysis. POPS enables alarms and warning signals on current, power, and power factor for both low and high values.

 Need remote power management at the rack level? You can do that with HDOT’s Switched Outlets. With the ability to turn ON and OFF or reboot outlets individually or as a group, certain features become possible such as outlet access and lock-out, power-up outlet sequencing that reduces the likelihood of power-up inrush, and our optional smart load shedding.

Furthermore, you can put the calculator away when trying to balance a 3-phase PDU. With HDOT’s Alt-Phase Technology you can distribute phases on a per receptacle basis (rather than in discrete separate banks), providing tangible benefits in the form of shorter cable runs, resulting in better airflow, easier load balancing, and greater efficiencies. Prior to the advent of HDOT, Alternating Phase products were impractical to build due to the low outlet density inherent with discreet commercially available outlets.

Safety and reliability are another top concern when adjusting rack densities, so it’s important to watch for temperature fluctuations. Denser racks are much hotter, and can lead to fires and outages if left unmonitored. HDOT PDUs come with a UL94 V-O flame rating, making them suited for harsh data center environments. They can also sync with Server Technology’s Sentry Power Manager, which can provide real-time temperature and humidity metrics.

What’s more, HDOT PDUs are built on the PRO2 hardware and firmware platform, which helps ensure stability, performance and uptime. And their alternating phase outlets can make load balancing a breeze.

Want to learn more about how HDOT PDUs can benefit your data center? Click here!

Topics: HDOT, density, HDOT Switched

Problem? Not A Problem With HDOT Switched PDUs.

Posted by Erik Stabile on Dec 1, 2016 10:00:00 AM

If a solution doesn’t exist for your problem, we’ll innovate one, simple as that. Case in point: our High Density Outlet Technology (HDOT) PDUs didn’t exist until a client came to us looking for an innovative solution to a unique challenge.

Travis Irons, Server Technology Director of Engineering, recalls the moment the idea for HDOT came to him.

“About four years ago, one of our larger clients came to us with a quote for 40 to 50 different configurations of products,” Irons says. “Many of them were high density, with many outlets for the volume. With the conventional, off-the-shelf outlets everyone was using then, we couldn’t make it fit at first.”

The answer, Irons says, was sitting right on his desk. It was a prototype of an outlet he was using to find a cord locking solution. He realized the cord locking aspect wouldn’t help Server Technology’s client, but its high-density design was just what they needed.

“I realized this thing that had been staring at me from my desk for months was the answer,” Irons says.

By stacking the outlets and slimming down the form factor, the HDOT was born. Today, it’s one of our top sellers, and it has begun racking up awards, too.

By offering a 20 to 30 percent reduction in footprint, the HDOT PDU allows data center customers to put more servers into their racks, saving on increasingly valuable real estate costs. Using alternating phase power, HDOT creates a more efficient flow than those running one- or two-phase power. It also simplifies load balancing and cable management by creating shorter cable runs.

Check out the top 10 reasons to try our HDOT Switched units.

HDOT is available in Switched and Smart POPs to offer an extra level of monitoring for data center managers who are looking to track trends across the center floor. With HDOT in place, you can better understand and improve your power usage habits in a very short time. Another bonus: HDOT helps you spot zombie servers that consume power without providing any benefit.

In the end, Irons says the ability to innovate on the fly is a major differentiator for Server Technology.

“We can offer out of the box solutions and different technologies that just aren’t feasible for our competitors to design,” he says. “We have a small company mentality with a startup attitude and that, I think, gives us an edge.”

Click Here To Build Your Own HDOT PDU  with Alt-Phase and POPS

Topics: HDOT, data center power density, Switched

The Top Benefits of True HDOT With Alternating Phase Outlets

Posted by Josh Schaap on Jul 11, 2016 12:40:30 PM


In the past, a standard rack only held about nine servers and consumed around 6 kW of power when running at full capacity. With this load capability, you could safely power a full rack using a single-phase power distribution unit (PDU).

Times have changed, though, as the servers you are using today are slimmer and more powerful, which allows for much greater density in the rack. Now, you can fit about 10 times as many servers onto a single rack, which can save valuable data center real estate. For this reason, many data centers are now experimenting with higher cabinet densities to maximize output.

As convenient as this is, however, it also presents a challenge from a power management perspective. The more servers you add to a rack, the more power you will draw. A full rack of blade servers, for instance, can easily consume around 20 kW of electricity or more depending on your usage. Running a single-phase PDU with such a heavy load is a sure-fire way to trip your circuit breakers and cause a power outage.

So, what can you use to run high-density power loads both safely and efficiently?

Consider investing in Server Technology’s patented, market-leading High Density Outlet Technology (HDOT) Alternating Phase PDUs—specifically engineered for data centers with limited cabinet space and heavy power workloads. HDOT Alternating Phase PDUs deliver three-phase power distribution to the rack, providing over 50 percent more electricity. With 42 C13 outlets in a 42U-high by 1U-wide device, HDOT offers the highest outlet density on a connected PDU. 

Here are the top benefits of using HDOT Alternating Phase PDUs in your data center:

Easier load balancing for three-phase PDUs: Load balancing is necessary for reasons related to safety and power efficiency; unbalanced power loads, for instance, can cause uneven voltage and current measurements, which can be harmful to your equipment. Unbalanced loads can also trip your circuit breakers. Whereas load balancing can be a confusing and time-consuming task, HDOT simplifies the process with an alternating phase arrangement that will allow you to alternate phase pairs on a per-outlet basis. The result is less clutter and shorter cords.

Convenient size: Part of what makes HDOT so popular is its stripped-down, convenient size. When creating the HDOT product line, Server Technology’s designers removed all of the unnecessary material around each outlet. Like other PDUs in the HDOT family, the only thing that remains on the HDOT Alternating Phase PDUs is the core outlet structure, which makes them easier to mount in or around tightly packed cabinets.

High native cord retention: We’ve all been there: You’re performing routine maintenance in your data center and you accidentally bump into a power cord, causing it to disconnect from its outlet. It happens quite frequently in the data center, especially when moving equipment. Traditionally, the solution was to invest in expensive, custom ancillary cord-locking devices for each outlet. HDOT streamlines the process by using high native cord retention, which holds plugs firmly in place while they are attached to an outlet. So, once you plug a device into an HDOT Alternating Phase PDU, you can rest assured that it will stay exactly where you put it.

Custom design: When purchasing an HDOT PDU, you can choose a configuration that meets your exact needs using Server Technology’s “build your own PDU” program. The process takes just seven steps, and is a walk through where you will select everything from your voltage, amperage and phase requirements to power input, orientation, outlets, connectivity and quantity preferences. This program can also be used to build HDOT Switched, Smart and Metered PDUs. 


Want to learn more about how Server Technology can help your business improve its power density strategy? Click here.

Topics: HDOT, Alternating phase

Server Technology’s HDOT Wins Big At DCS Awards In London

Posted by Erik Stabile on Jun 1, 2016 7:00:00 AM


Server Technology’s High Density Outlet Technology PDU took home the Data Center PDU Product of the Year at the annual DCS awards in London on May 12. Each year, the DCS awards recognize the top product designers, manufacturers, suppliers and providers operating in the data center field. This marks the second major accolade for HDOT, after it won the DCD 2014 Future Thinking Award.

About HDOT


The HDOT is the most feature-rich rackmount PDU we’ve developed to date, and it’s perfect for customers who have between 36 and 54 devices in their cabinet, need quick-turn PDUs with a large number of outlet variations, are looking to minimize power drops and need high-temperature PDUs. The proprietary outlet design of HDOT makes it the perfect tool for capacity planning, power density and uptime.

With HDOT, you get:

  • Highest density of outlets in a rack PDU
  • PRO2 firmware for a feature-rich platform
  • Alternating Phase Outlet configuration, simplifying load and phase balancing

Ready to create your own HDOT PDU? Get started building one with our online design tool on the all-new ServerTech.com and see why HDOT is the only high density PDU built for your needs.

Topics: HDOT, awards

Kill two birds with one stone in your data center this spring

Posted by Josh Schaap on Mar 16, 2015 10:15:50 AM


Now that winter’s vista can be appreciated only in your rearview mirror, it’s time to take a look around your data center and engage in some old-fashioned spring cleaning.

You’ll likely find two areas that could use your attention: space constraints and heavy electricity usage. Like most data centers, you are running out of room as you add more cabinets, and your monthly utility bill is spiking accordingly.

So what’s the easiest way to reduce space and power consumption without sacrificing performance or uptime? Server Technology’s new High Density Outlet Technology (HDOT) Switched solution can help make this process easy; in fact, it can solve both problems for you.

The latest product from Server Technology’s HDOT PDU line, HDOT Switched combines up to 40 outlets in a single unit. HDOT Switched combines alternating-phase power outlets with the flexible and feature-rich PRO2 platform, for the latest hardware and firmware technology available on the market.

HDOT Switched can easily be added to the top or side of a cabinet, which means you no longer have to worry about keeping your critical PDU on the floor where cords can be a safety hazard, damaged or dislodged. Furthermore, HDOT Switched comes equipped with next-generation Per Inlet Power Sensing (PIPS) technology, which reports advanced power monitoring information to end users in real time. This information can be transmitted via Bluetooth connectivity for onsite usage. It can also be accessed over any standard Web browser for easy remote viewing capabilities.

Are you interested in learning more about HDOT Switched? You can find more information by clicking here.

Topics: HDOT, Data Center, power distribution and monitoring

Your All-In-1 PDU Solution - HDOT Switched

Posted by Erik Stabile on Mar 10, 2015 12:49:36 PM


Introducing the High Density Outlet Technology (HDOT) Switched PDU, your All-in-1 PDU Solution. The HDOT Switched PDU is the most versatile solution for today’s demanding data center environment, which combines Server Technology’s best solutions in an All-in-1 PDU,  it includes

  • HDOT- most outlets in the right place in a smaller form factor
  • Alternating Phase Outlets- provides easy load balancing, better airflow and greater efficiencies
  • PRO2 a flexible and feature rich hardware and firmware platform.

See the press release to learn more or new Solution Video.  

Topics: HDOT, PDUs, Alternating phase, PRO2, New Products, HDOT Switched, Products

Server Technology Wins a TMC 2014 infoTECH Spotlight Data Center Excellence Award

Posted by Erik Stabile on Dec 18, 2014 1:20:00 PM

InfoTech Data Cntr Exc 14 resized 600

Server Technology was recently awarded a TMC 2014 infoTech Spotlight Data Center Excellence Award for High Density Outlet Technology. The 2014 infoTECH Spotlight Data Center Excellence Award recognizes the most innovative and enterprising data center vendors who offer infrastructure or software, servers or cooling systems, cabling or management applications.

Server Technology was recognized for High Density Outlet Technology (HDOT), HDOT provides up to 42 C13’s in a 42U high by 1U wide device, the highest possible outlet density available in a network connected PDU. Manufactured with robust high temperature materials carrying a UL94 V-0 flame rating makes these outlets ideally suited for harsh data center environments. Additional features include high native cord retention that eliminates the need for custom and costly ancillary locking cord devices.

To order the HDOT PDU go to STIs new Build Your Own PDU configurator on servertech.com, where you can configure your own custom HDOT PDU.

Learn more at http://information.servertech.com/hdot

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Topics: HDOT, PDUs, awards, Datacenter Awards