LEGATO SYSTEMS AND NETWORK APPLIANCE DELIVER INDUSTRY’S FIRST APPLICATION HIGH AVAILABILITY SOLUTION FOR NETWORK ATTACHED STORAGE

• Wednesday, 01 December 1999

Ericsson Reports Continuous Availability of Mission-Critical Application Services

Legato Systems, Inc., the leader in enterprise storage management software and Network
Appliance, Inc, the leading provider of network-attached data access and management
solutions, announces the first comprehensive application availability solution for
network-attached storage (NAS).
In this solution, Legato Cluster provides clients with continuous access to critical
applications and NetApp Clustered Failover software provides fail-safe access to business
critical data stored on NetApp filers. Customers using this solution gain continuous
availability of mission-critical application services, while deploying a highly available,
dynamically scalable and easy-to-manage storage infrastructure.

NetApp and Legato partnered in January 1998 to deliver data availability and data protection
software solutions. Today’s announcement provides the first high availability application
failover solution for NAS to the enterprise marketplace. Legato and NetApp are committed to
providing customers with highly available data management solutions that are extremely
reliable and simple to manage.

"At Ericsson worldwide, 32,000 licenses of a mission-critical configuration
management application are being used," said Robert Ikenberg, DT/IT
application manager at Ericsson Mobile Communications, a leading global
provider of telecommunications solutions. "Continuous access to this and
other applications and data is a critical requirement. With the combined
NetApp/Legato solution, we can now do planned server maintenance with no interruption to
end-user productivity and unplanned server downtime is virtually eliminated. Additionally,
our backup and restore time is now
dramatically improved and transparent to users."

Legato Cluster is the first high availability solution to enable Fortune
2000 customers to proactively manage service-level availability on UNIX and Windows NT
application servers. It ensures applications, data and resources remain available to users
during planned events like system tuning, as well as unplanned events like load fluctuations
and system failure. Legato Cluster enables IT organisations to proactively prevent
application and system failures, to optimise system operations and to continuously tune
applications without compromising service levels.

NetApp Clustered Failover software provides a fail-safe data service to
UNIX, Windows and Web network clients and application servers. It provides a transparent,
automated failover capability and enhances the highly available, dynamically scalable and
easy-to-manage data service inherent in NetApp’s systems.

"This class of comprehensive availability that guarantees access to data
and applications through planned as well as unplanned downtime, is the type of solution that
our enterprise customers like Ericsson are demanding," said Jim Chappell, senior vice
president, Legato Systems. "Legato Cluster was certified to work with Network Appliance’s
NAS products with no change to our standard product, proving that Legato Cluster’s design is
architecture-independent. This means that our customers can take immediate advantage of the
storage architecture of their choice and preserve their investment in Legato Cluster."

"Legato Cluster adds continuous information availability solutions to our
combined Legato-Network Appliance product offering," said Larry Kubo, vice president of
marketing at Network Appliance. "This new data availability solution not only provides high
availability to mission-critical
applications, but it also simplifies overall management and improves network performance
through the addition of network attached storage."

Several Legato Cluster and NetApp filer configurations were certified to
provide a range of comprehensive high-availability solutions for UNIX and
Windows NT application users:

Legato Cluster can be installed on Unix or Windows NT application servers
that use a NetApp filer for their data repository. Legato Cluster can
support a virtually unlimited number of servers, to enable customers to use
as many application servers as they need to ensure application availability
and service level agreements. In the event that an application or
application server fails, NetApp filers continue to provide data service to
all active applications. The filers are also immediately available to
provide data service as soon as Legato Cluster restarts the failed
applications.

Legato Cluster can be installed on Unix or Windows NT application servers
that use a clustered pair of NetApp filers for their data repository. In
this configuration, NetApp Clustered Failover software is enabled on the
clustered filers. It ensures data availability in the event that one filer
fails, by automatically and transparently switching data access requests
over to the second filer. Legato Cluster keeps applications available on
attached applications servers through data repository failures, by managing the connection to
the NetApp filer.

Using this combined high availability solution, customers gain protection
from downtime of their key enterprise application services, including ERP
solutions such as SAP R3, database solutions such as Oracle, and E-business
applications such as Microsoft IIS or Netscape Server. This solution is
available for applications that support network attached storage.

"As the recent experiences of a number of e-commerce companies such as eBay, E-Trade, and AOL
attest, downtime is a killer," states Michael Peterson, president of Strategic Research Corp.
"All companies are susceptible to application, network, storage and site-level outages. It
is imperative that high availability solutions that include application failover plus data
protection become a strategic component of continuous operations plan. The experience of IT
managers is that failure to do so imperils your company."



Notes to Editors:

About Legato Systems

Legato Systems, Inc. (NASDAQ: LGTO), is a worldwide leader in enterprise
storage management software. Helping companies leverage business-critical, corporate data
assets, Legato's products enable information continuance, a seamless approach to the
movement, management and protection of data throughout an enterprise. Founded in 1989,
Legato's storage management software products have become the recognised industry standard
with the largest installed base representing over 65,000 customers. Legato's products are
available through a network of Legato-licensed resellers, integrators and OEM partners and
directly from Legato. More information is available at www.legato.com.

About Network Appliance, Inc.

Network Appliance, a veteran in network file serving and caching, has been
providing data access solutions for over six years. Major corporations and
ISPs, including Bear Stearns, Yahoo!, Siemens, Lockheed-Martin, Cisco,
Motorola and Texas Instruments have deployed NetApp® solutions. NetApp file servers (called
‘filers’) and Internet caching solutions (NetCache appliances) deliver fast, simple, reliable
and cost-effective access to network-stored data and enable simultaneous shared file services
for UNIX, Windows and the World Wide Web. The company pioneered the concept of the ‘network
appliance’ an extension of the industry trend toward dedicated, specialised products that
perform a single function. Network Appliance filers and NetCache appliances are based on the
company's patented data access solutions including Data ONTAP software and
standards-compliant hardware. More information is available at www.netapp.com.

The Legato logo design, Legato, Legato NetWorker, SmartMedia, and ClientPak are registered
trademarks, and Celestra, Co-StandbyServer, GEMS, and SnapShotServer are trademarks of Legato
Systems, Inc. All other brand names are trademarks of their respective owners.

For more information, please contact:
Brian Haynes

Legato Systems UK

Legato House

Waltham Rd

White Waltham

Nr Maidenhead

Berkshire SL6 3NH

Tel: 01628 511811

Fax: 01628 511812

Email: bhaynes@legato.com

Alex Laity / Stephanie Mair

Spreckley Pittham Ltd

214 Great Portland Street

London

W1N 5HG

Tel: 0171 388 9988

Fax: 0171 388 8588

Email: laity@spreckley.co.uk or mair@spreckley.co.uk

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