Copyright IBM Corporation 2009
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Floor space savings ............................................................................................. 17
Power and cooling savings ................................................................................... 18
Copyright IBM Corporation 2009 iii
TCO Reinvented
Introduction
A high-end storage system’s total cost of ownership (TCO) is like an iceberg: the vast
majority of costs are hidden from view. Comparing systems by looking at obvious factors,
like capacity and box price, may be easier. But taking a fuller look at the factors impacting
IT budgets over a system’s lifetime will yield a more accurate TCO assessment and,
ultimately, a more informed decision as to which system is truly more favorable to the
company's bottom line.
The chart below shows a fuller set of storage array cost factors and their generally
recognized relative impact on a system’s overall cost.*
1
Figure 1: Typical TCO costs of enterprise storage arrays
1
In “Governance Dashboard for Enterprise Storage” (Information Management Magazine, May 2006), Dick
Benton of GlassHouse Technologies Inc. notes that Gartner and Forrester attribute as much as 60-70% of
overall storage TCO to the Administration factor. This large figure likely comes from grouping Administration
together with Backup/Restore and other cost factor categories. Here, we break them out separately.
Copyright IBM Corporation 2009 1
TCO Reinvented
In short, a thorough TCO assessment needs to take into account the cost of:
► Buying, implementing, running, cooling, and expanding the system
► Managing, integrating, and testing the system
► Ensuring the system’s reliability and availability
► Downtime caused by routine maintenance or unexpected equipment failure
► Savings opportunities lost during the time it takes the system to integrate newly
available, cost-reducing technologies
► Software licensing – at time of purchase and upon each capacity increase
The IBM XIV® Storage System has been architected to address all these cost issues. This
paper looks at the true total cost of owning an enterprise-class storage system and the
XIV system’s winning, truly cost-reducing approach.
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It should be stated that it is inaccurate and even impractical to compare overall cost of
the XIV system with other storage systems using all VHDSR drives or currentgeneration enterprise-class systems using a significant number of 1 TB drives. This is
because these systems, unlike IBM XIV, do not use 1 TB drives for tier 1 or even tier 2 storage; rather, for archiving and other needs that do not require high
performance or high reliability. The XIV system provides enterprise-class performance
and reliability for all data at all times. In short, the quality of the storage is different.
It goes without saying that the huge cost advantage resulting from XIV ease of
management and software features is relevant in any comparison.
IBM XIV: Designed for Low TCO
Architected to deliver high reliability and performance at exceptionally low TCO, the IBM
XIV Storage System is:
► A fully virtualized, self-managed, self-healing system that balances load perfectly
at all times, optimizing capacity use and minimizing human intervention and error
► Complete with a built-in features set, including differential snapshots, remote
mirroring, and thin provisioning
► Easily managed through a simple graphical user interface (GUI) that minimizes
storage management overhead
► Built entirely of standard components, including low-cost, very high density slower
rotation disks (VHDSR)
► Fully hardware redundant, lowering risk of failure to negligible levels and enabling
disks to be added and replaced on the fly without a performance hit or downtime
► A single-tier platform based on a grid architecture, for easy scaling
Copyright IBM Corporation 2009 2
Environmentals
Reduced power and
cooling
Minimized space
footprint
Integral UPS
Backup/Restore
Snaps with no
performance impact
Differential snaps
VSS support
Simple migration
Consistency groups
Acquisition
Single-tier architecture
Commodity hardware
Lower hardware costs
Just-in-time purchasing
Efficient thin provisioning
Optimal capacity use
All key aspects scalable
All software included; no licensing
Downtime
Less hardware to fail
Integral UPS
Less human intervention
Easy to monitor
Rapid self-healing and scrubbing
All components redundant
Free and flexible volume replication
Administration
Fast deployment
Simplified storage
management
Space reclamation
Self-tuning
Rolling upgrade
Transparent scaling with
no hidden costs
Environmentals
Reduced power and cooling
Minimized space footprint
TCO Reinvented
The XIV system is designed to comprehensively tackle each storage TCO factor, in
multiple ways, as delineated below:
Figure 2: How XIV storage reduces TCO
The result is that the XIV system succeeds in dramatically improving each TCO factor
(with the exception of fixed factors, such as hardware maintenance) while other storage
systems typically focus on reducing only one or two cost factors. For example, even if a
system’s upfront cost is largely discounted, its TCO will still be high due to ongoing
administration and maintenance costs; a system with improved performance often has
higher environmental costs.
By taking a balanced and comprehensive approach to reducing all cost factors, the XIV
system succeeds in dramatically reducing TCO where other systems fail.
Copyright IBM Corporation 2009 3
TCO Reinvented
Figure 3: Overall TCO: Traditional Tier-1 storage vs. XIV storage
Acquisition Costs
The IBM XIV Storage System is designed to be cost-efficient in all aspects, while
delivering outstanding and consistent performance. The XIV system’s:
►Single-tier architecture supports all kinds of storage in one environment and
makes scaling easy
► Use of off-the-shelf components makes customized hardware unnecessary and
makes it possible to integrate newer, state-of-the-art hardware as soon as it
becomes available and without delay
► Innovative use of highly economical disk drives [Very High Density Slower
Rotation (VHDSR) drives] offers excellent capacity-for-cost value while meeting
enterprise performance standards
► Built-in thin-provisioning allows the acquisition and installation of additional
capacity to be delayed until needed, making it possible to defer capital purchases
and take full advantage of future hardware and price-point improvements not
currently available
Copyright IBM Corporation 2009 4
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