The Raritan Blog

How Raritan’s KVM-Over-IP Switch Is Being Used in Astrophysical Observatory

Rick Gonedes
May 25, 2017

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Up until recently, the Okayama Astrophysical Observatory in Japan had been operating in what they call a "classical mode." A principal investigator and/or team members would come to the observatory operate the telescope and instruments collecting all relevant data of interest and go on their way. The observing console consisted of three PCs, keyboards, mouse, speakers, six Full-HD monitors and some other related equipment. 

IDC LINK:  Raritan’s new iPDU is a Building Block for Smarter Datacenters

Rick Gonedes
April 18, 2017

The industry can’t stop talking about Raritan’s new portfolio of intelligent power products equipped with the advance iX7 controller. According to IDC research “As organizations utilize more edge datacenter resources to support digital transformation and IoT initiatives, the ability to remotely manage and control datacenter infrastructure will become a must-have feature. Infrastructure such as Raritan's iX7-powered iPDUs will be an integral building block for smarter datacenters.”

What Is the iX7™ Advance PDU Controller and How Could It Improve My Data Center Operations?

Rick Gonedes
April 4, 2017

The iX7™ intelligent controller is Raritan’s newest advancement in the PDU industry. Before going into the details of what the iX7™ encompasses and why it’s changing the industry, it’s important to know the basic components of an intelligent PDU to help further your understanding. 

Data Center Cabinet Load Balancing:  there’s a less complicated way.

Scott Fier
March 28, 2017

Why do we load balance?

Without going into the complicated math, suffice it to say that load balancing in a 3 phase system is desirable.  The more unbalanced a system the more problems it creates.  UPS life, for one, can be affected by unbalanced systems.  Although one circuit (server cabinet) being out of balance won’t have much effect, if many or all circuits on a panel are out of balance, the main circuit supplying the breaker panel will be out of balance and this can ruin your upstream UPS.  There are also efficiency issues with unbalanced loads.

How is load balancing currently accomplished in a rack cabinet?

To balance a load in a cabinet, the loads of the equipment power supplies are spread across the 3 phases – L1/L2, L2/L3, L3/L1.  This is done by plugging the first server (or switch/router) in an outlet wired on L1/L2, the next server on L2/L3, the next on L3/L1, then start over.  The goal is to get an equal number of devices/loads on all 3 phases – or as close as possible. 

This approach can quickly turn into a cabling nightmare. Most rack PDUs are linear in their phase layout of outlets – there are only three banks of outlets, one for each phase.  For example, on a 36 outlet PDU, outlets 1 through 12 will be on L1/L2, 13 through 24 on L2/L3, and 25 through 36 on L3/L1.  If you use the above method of balancing, and start racking the devices at the bottom U position, the third device you plug in will need to reach the top third of the PDU and the last device may have to reach back to the bottom of the PDU.  In other words, a lot of crisscrossed cabling.

How do Raritan’s balance the cable and load balancing challenge?

In certain Raritan PX three-phase models the architecture gets around the cabling issue by staggering the grouping of outlets - there are at least 6 banks of outlets.  For example, outlets 1 through 6 are on L1/L2, 7 through 12 on L2/L3, 13 through 18 on L3/L1, but then we start over at L1/L2 for outlets 19 through 24. (See Illustration below)

This intelligently engineered architecture results in more reliability and easier execution.  The devices towards the top of the cabinet don’t need to be plugged in to the bottom of the PDU and devices at the bottom don’t need to be plugged in to the top.

New Two Minute PX Rack PDU Video

Michael Bord
August 15, 2016

What sets the PX series of intelligent PDUs apart from other power strips? Greater value. And that goes beyond reliable power distribution. It's about improving uptime and capacity management.  Saving energy and reducing your carbon footprint.  Managing geographically dispersed infrastructure that needs to be more reliable than ever before.  In short, it's about meeting the challenges you face in your everyday life head-on, with solutions that are engineered with you in mind.  Watch this new clip to see exactly what we mean. 

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