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consumes half the power of an MDFR drive-based system, with at least 25% more
savings per drive due to lower energy consumption. A system that uses VHDSR drives of
1 TB capacity per drive, rather than MDFR drives of 146 GB capacity per drive,
consumes 10% less power.
See the Appendix for formulas that calculate the comparative energy saved by the XIV
system in a given scenario. For more information on how the XIV system reduces power
usage, see the
IBM XIV Power Consumption Reinvented
Floor space use
Today, VHDSR drives offer capacities that are twice as much or more than those of
MDFR drives. Replacing an existing MDFR storage system with the XIV system enables
customers to use at least 50% fewer disk shelves. For existing storage, this can translate
to a space savings of more than 80% (to clarify: VHDSR drives take up the same space
as the MDFR drives, but provide 1 TB of storage capacity rather than 146 GB).
Award-winning regional and academic medical center: "We've shrunk our
floor footprint from 10 tiles down to two. With the more efficient XIV rack,
we're seeing an 80% reduction in our cooling and power use."
Additional floor space is saved as a result of proportionately less related infrastructure,
such as power, cooling, and network hardware.
The
Appendix
provides formulas for calculating the comparative floor space savings
provided by the XIV system in a given scenario. Savings may also accrue by avoiding
costs associated with IT facility renovations required to accommodate more physical
storage and the related organizational disruption that would take place.
While these indirect savings are often overlooked and/or underestimated, the simple fact
is that if physical space is not available, a data center must be expanded or relocated.
The space-efficient IBM XIV Storage System may well help protect an organization's
existing infrastructure investment.
Summary: How to reduce environmental costs
The XIV system is inherently "green": high storage densities and ongoing efficient use of
capacity create a minimized footprint – including excellent floor use per capacity ratios,
and related power and cooling efficiencies – from the point of deployment and onward.
Copyright IBM Corporation 2009
white paper.
Greg Johnson, chief technology officer
Virginia Commonwealth University Health System
11
TCO Reinvented
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