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Hitachi Lightning 9900™ User and Reference Guide 1
Chapter 1 Overview of the Lightning 9900™ Subsystem
1.1 Key Features of the Lightning 9900™ Subsystem
The Hitachi Lightning 9900™ subsystem provides high-speed response, continuous data
availability, scalable connectivity, and expandable capacity for both S/390
®
and open-
systems environments. The 9900 subsystem is designed for use in 7×24 data centers that
demand high-performance, non-stop operation. The 9900 subsystem is compatible with
industry-standard software and supports concurrent attachment to multiple host systems and
platforms. The 9900 subsystem employs and improves upon the key characteristics of
generations of successful Hitachi disk storage subsystems to achieve high performance and
reliability. The advanced components, functions, and features of the Lightning 9900™
subsystem represent an integrated approach to data retrieval and storage management.
The Lightning 9900™ subsystem provides many new benefits and advantages for the user.
The 9900 subsystem can operate with multihost applications and host clusters, and is
designed to handle very large databases as well as data warehousing and data mining
applications that store and retrieve terabytes of data. The Lightning 9900™ provides up to 32
host interface ports and can be configured for all-mainframe, all-open, or multiplatform
operations.
Instant access to data around the clock:
– 100 percent data availability guarantee.
– No single point of failure.
– Highly resilient multi-path fibre architecture.
– Fully redundant, hot-swappable components.
– Global dynamic hot sparing.
– Duplexed write cache with battery backup.
– Hi-Track
®
“call-home” maintenance system.
– Non-disruptive microcode updates.
– RAID-1 and/or RAID-5 array groups within the same subsystem.
Unmatched performance and capacity:
– Industry’s only internal switched fabric architecture.
– Multiple point-to-point data and control paths.
– Up to 6.4-GB/sec internal system bandwidth.
– Fully addressable 32-GB data cache; separate control cache.
– Extremely fast and intelligent cache algorithms.
– Non-disruptive expansion to over 88 TB raw capacity.
– Simultaneous transfers from up to 32 separate hosts.
– High-throughput 10K RPM fibre-channel, dual-active disk drives.