HP Utility Ready Storage Solution White Paper

HP Solutions White Paper - Utility Ready Storage Solution.
Download
Page  of 13
4.4, 1991 votes
background image

ISS Technology Update                                                                 Volume 7, Number 9 
 

ISS Technology Update 
Volume 7, Number 9 
Keeping you informed of the latest ISS technology 

 

Quick tips for differences in energy efficiency between online “double-conversion” technology and online 
“on-demand” technology ........................................................................................................................1
 

Use iLO Advanced to capture server event video......................................................................................2 

HP Industry Standard Servers - a leader in industry standards for storage ..............................................4 

Meet the Expert—Mark Fletcher (confessions of an ISS “hitman”).............................................................6 

Common SM CLP scripting commands for ProLiant server management, Part 2 ........................................7 

Recently published industry standard server technology papers ............................................................13 

Contact us .............................................................................................................................................13 
 
Quick tips for differences in energy efficiency between online “double-

conversion” technology and online “on-demand” technology  
This quick tip first defines online “on-demand” technology and online “double-conversion” technology. It then contrasts the 

energy efficiency performance delivered by these two technologies, each of which uses a different method to ensure a reliable 
power source for continuous data center operations. 

Online “double-conversion” technology  
Online double-conversion is currently the technology that most data centers use for their uninterruptible power supply (UPS) 

systems. In this type of UPS, the inverter is always on; it continuously converts AC to DC and then DC to AC. This generates a 

pristine, or very low-distortion, sinusoidal waveform; however, efficiency is significantly lower than with online on-demand. 

Online “on-demand” technology…plus double conversion 
Online on-demand is an energy efficient technology that allows incoming power to connect directly to the load through 
protected circuits when the incoming power is within specifications. When the power is not within specifications, the double-

conversion technology takes over to regulate the incoming voltage to an acceptable level for the load. Both online on-demand 

and double-conversion modes protect the critical load from voltage fluctuations and from damaging transients that can originate 

at the utility. And in the event the power goes out completely, the energy from the battery is converted to provide power to the 
load until the utility returns service or until a graceful equipment shutdown becomes necessary.  

0.569085s