Hitachi High-Availability
Software Improves
Application Service Levels
An Overview of
It is increasingly important for a business to support continued access to global information 24 hours a day, 7 days a week. What’s more, careers often depend on the availability of service levels provided by IT to the enterprise.
In computer science, availability refers to the degree to which a system or resource is capable of performing its normal function. Availability is measured in terms of Mean Time Between Failure (MTBF) divided by MTBF plus the Mean Time to Repair (MTTR).
•AVAILABILITY = MTBF / (MTBF+MTTR).
For example, a server which fails on average once every 5,000 hours and takes an average of two hours to diagnose, replace faulty components and reboot, would have an availability rating of 5,000/(5,000 + 2) = 99.96%. This would correspond to a Level 3 rating using the Scale of 9s.
Software products contribute to
Many factors can cause unplanned downtime. The Hitachi Freedom Storage™ Lightning 9900™ has been designed to eliminate as many of these factors as possible in both hardware redundancy,
Backup and restore procedures and products also contribute dramatically to computer system availability by reducing the time to restore operations in the event of an outage.
Hitachi has teamed with
The Lightning 9900™ has an Advanced Availability Profile compared to Competitive Products
The Lightning 9900™ was designed with maximum emphasis on
•Active
•Redundant active components throughout the system combined with automatic
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Availability refers to the degree to which a system or resource is capable of performing its normal function.
Customers and analysts alike regard Hitachi Freedom Storage systems as having the highest availability in the industry.
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