Redbooks Paper
Alex Osuna
Infrastructure Simplification with IBM
System Storage N Series
Introduction
This IBM Redpaper discusses how the IBM® System Storage™ N series storage
system simplifies your storage infrastructure.
The signs of complexity are everywhere in the modern data center (see Figure 1
on page 2). Firewalls, routers, servers, and multiple operating systems are just
the beginning. Server environments, networks, and storage are typically silos of
resources that are dedicated per application. They grow with only a loose
connection to one another and usually with no regard for overall system
complexity. Such environments can be difficult to understand, manage, secure,
update, and operate.
© Copyright IBM Corp. 2006. All rights reserved.
ibm.com/redbooks
1
Figure 1 Storage complexity
Infrastructure simplification is a method of looking at an entire environment from
end to end and finding ways to eliminate the complexity that can inhibit the free
flow of information that is necessary in the fast-paced business world.
The storage environment offers numerous opportunities for simplification that
can help unlock the value of information to your business. The ability to share
and manage information simply and easily is a key requirement for integrating
business processes and for On Demand Business. In this paper, we focus on the
storage portion of the IT environment.
The IBM N series storage system can help simplify a storage infrastructure and
the management of that infrastructure. Using the broad features of the IBM N
series storage system, a company can holistically address simplification issues,
data, and storage and create a more cost-effective, flexible, and resilient
environment.
In many cases, storage products come from different vendors and represent
different generations of technology. Often, this is a natural result of short-term
needs outweighing long-term planning or of unplanned growth such as mergers
2
Infrastructure Simplification with IBM System Storage N Series
and acquisitions. Network Appliance Snapshots, recovery and backup
processes, volume and information management, and other management tasks
often incorporate different software from different vendors. An organization that is
hampered by such inconsistencies cannot expect to deploy resources where they
are most needed or respond to customer needs in a timely fashion.
What can an enterprise do? It can make the move towards infrastructure
simplification. Infrastructure simplification helps enable business growth, helps
reduce operational risks, and helps reduce costs by optimizing IT resources and
improving productivity.
The free flow of information throughout an organization is the main currency for
business innovation and creativity. Throughout a company, the IT infrastructure is
where all of this information flows. When the IT infrastructure grows without
regard to easing information flow, complexity can choke that free flow just as
arterial plaque chokes blood flowing to the heart.
How can infrastructure simplification help a business achieve its goals?
Simplification strips away inhibitors to business acceleration for faster product
development and communications with customers and partners. Simplification
also allows shared data to foster innovation. Most importantly, by providing a
highly efficient, highly automated environment, infrastructure simplification can
help reduce the total cost of ownership (TCO) for an enterprise. When people
have instant access to the information that they need in the form that they need,
they can provide better service to customers and find better ways to bring value
to the marketplace.
Three proven methods
Storage today has evolved with a shift towards networked storage (see Figure 2
on page 4).
Infrastructure Simplification with IBM System Storage N Series
3
Technology shifting towards the network
Storage
virtualization
Virtualization
Storage
networking
Networking
Consolidation
Heterogeneous
Heterogeneous
storage
Storage
Direct attach
storage
Shared
storage
Schedule-based
Schedule based
automation
Automation
Networked storage
Figure 2 Storage evolution
Using three proven methods, you can reduce the complexity of a networked
storage environment. These methods can help organizations achieve better
application availability, improved productivity, and better system optimization,
including utilization. The methods are:
򐂰 Consolidation
򐂰 Virtualization
򐂰 Automated management
Consolidation
Consolidating the storage environment is the logical first step in any effort to
simplify infrastructure. There are generally four approaches to consolidation:
򐂰 Centralization, or reducing the number of locations where data is stored to
only those that are really needed
򐂰 Physical consolidation to fewer, larger-capacity devices (“scale up”)
򐂰 Data integration through such means as modular storage that easily “scales
out” by adding more of the same units
򐂰 Application integration, or moving applications from clusters or multiple linked
servers to a smaller number of storage devices
4
Infrastructure Simplification with IBM System Storage N Series
The general goal of consolidation is to reduce the number of points of
management and the number of physical devices. Consolidated storage
environments have fewer elements, which can help reduce the chance of error or
failure, avoid the creation of islands of storage, and take better advantage of
economies of scale for owning software, disks, and tape. Consolidated
environments can be more resilient and more cost effective to manage, reducing
planned downtime and TCO.
In consolidated environments, servers and storage can scale up or out,
depending on the needs of an organization. You can scale up with large capacity
tape and disk systems while also scaling out with modular storage products. In
addition to scaling storage technology, scale-up server technology can assist
your business with the handling of surges in application usage and transaction
rates. Scale-out server technology can help you handle hundreds, or even
thousands, of application instances.
Virtualization
Effective virtualization is an essential part of a simplified storage environment. It
involves a shift in thinking from physical to logical, treating IT resources as a
single, logical pool rather than as separate physical entities.
Sieb
As business processes
change, they can easily
be linked to the proper
storage for the
business need.
FCP, iSCSI, NFS,CIFS, HTTP
N series
SATA
Fibre Array
Figure 3 Storage virtualization
Virtualization is a natural part of the progression of IT systems. Other networks,
such as e-mail and the Internet, have long since progressed past the need to
keep track of physical resources in order to perform. The same shift is now
necessary for storage networks. Just as Web site addresses mask numeric IP
Infrastructure Simplification with IBM System Storage N Series
5
addresses and e-mail addresses mask a sequence of router hops leading to a
final e-mail server, virtualization masks complexity.
Virtualization can help an enterprise:
򐂰 Increase resource utilization by combining the storage capacity of multiple
disk arrays into a single reservoir of storage.
򐂰 Improve personnel productivity by enabling administrators to manage their
reservoir of storage from a single user interface at a central point.
򐂰 Enable a tiered storage environment in which the cost of the storage can be
matched to the value of the data.
򐂰 Aid with the consolidation of resources and simplification of management to
help reduce cost and complexity, allowing a business to focus on innovation
and growth.
򐂰 Use grid computing to help broaden the access to resources such as data,
applications, and processing capacity.
򐂰 Offer the freedom to use heterogeneous hardware providers with common
server management, storage management, and copy services software.
Virtualization in storage is a key component of creating a multi-tier storage
environment that is managed separately from the application and server layers.
By insulating the file, volume layers, or both from applications, virtualization helps
make it easier to enact data life cycle management, the enabling infrastructure
for information life cycle management.
Automated management
The third proven simplification method is automated management. Automated
management can help you understand, manage, and make necessary changes
to an IT environment when you have been previously authorized to do so by an IT
administrator. This can help produce increased reliability and productivity for a
business.
Automation tools can aid with backups. For example, you can use IBM Tivoli®
Storage Manager to schedule and manage backups. Automated management
can also automate tasks such as Snapshots for applications (see Figure 4 on
page 7).
6
Infrastructure Simplification with IBM System Storage N Series
Figure 4 Automating Snapshots
The important applications of automated management are:
򐂰 Driving resource provisioning and workload management with policies that
are based on business goals. This helps you attain better alignment of your IT
infrastructure with your business.
򐂰 Scheduled free space provisioning when someone in your enterprise asks for
additional storage space. You can automate each step in the process. Tasks
that previously took as long as 10 days might now take less time.
򐂰 Enterprise-wide reporting and monitoring through the automated tracking of
capacity, utilization, performance, file and device health, and integration with
systems management software.
򐂰 Emergency management when your device runs out of space or an
application suddenly fails in the middle of the night. With automated
management and virtualized storage pools, instead of trying to access the
storage from different areas and connecting it, you can remotely draw from
one big virtual pool of free space.
With integrated management products, you can automate complex tasks so that
you have the flexibility to design new tasks that take advantage of automation.
Infrastructure Simplification with IBM System Storage N Series
7
How IBM N series can help an enterprise
It is critically important not to isolate storage from a server and network
environment or treat it as a collection of separate, unrelated machines. Instead,
simplifying your storage infrastructure can help create a more cost-effective,
flexible, and resilient environment. In this environment, resources and
information flow freely to where they are most needed, and they can be retained
or removed based on business priorities.
The IBM N series has an impressive portfolio of features that includes:
򐂰
򐂰
򐂰
򐂰
򐂰
򐂰
Support of multiple operating systems
Multiple protocols
Different storage options for different performance characteristics
Virtualization
Automated management software
Attachment to heterogeneous storage
The IBM N series storage system can holistically address your infrastructure
simplification issues.
Consolidation with IBM N series
The IBM N series storage system can help consolidate storage with virtual filers,
FlexVol, and multi protocol support. It can also help you share and utilize data
better and can dramatically reduce the number of management points for storage
and servers in a scale-out strategy.
With the multiprotocol support of an IBM N series storage system, there is no
need to build storage silos that are based on access method or protocol. IBM N
series can serve both storage area network (SAN) and local area network (LAN)
protocols simultaneously (see Figure 5 on page 9).
8
Infrastructure Simplification with IBM System Storage N Series
SAN
Enterprise
LAN
Departmental
Enterprise
Departmental
iSCSI
Dedicated
Ethernet
Fibre
Channel
SAN
(Block)
Corporate
LAN
Nettwork Attached Storage
(File)
IBM
N series
18
© 2005 IBM Corporation
Figure 5 Multi protocol access
Also, businesses tend to have direct attached storage (Figure 6).
Siebel
Figure 6 Direct attached storage
Infrastructure Simplification with IBM System Storage N Series
9
This is especially true for small to medium-sized businesses.
With IBM N series, you can consolidate these islands of storage, increase
idolization, and decrease management (Figure 7). Implementations of IBM N
series do not require installing a SAN. Instead, you can utilize your existing IP
network.
Siebel
FCP, iSCSI, NFS,CIFS, HTTP
N series
64
IBM TotalStorage® | The power to break through
© 2004 IBM Corporation
Figure 7 Consolidating storage
In addition to being able to consolidate storage to one IBM N series storage
system, you can consolidate multivendor storage with the IBM System Storage N
series Gateway (see Figure 8 on page 11).
10
Infrastructure Simplification with IBM System Storage N Series
g
Siebel
FCP, iSCSI, NFS,CIFS, HTTP
N Series
IBM
HP
Hitachi
Figure 8 Multivendor storage
Network Appliance MultiStore technology provides an efficient architecture for
consolidating multiple physical storage systems into a smaller number of
systems. From the user’s perspective, each virtual storage controller appears as
a separate physical storage system with a unique IP address. For example,
storage for multiple business units can be consolidated into a smaller number of
systems, increasing the return on investment and also easing management
challenges. Application service providers can also consolidate the storage needs
of their customers.
The IBM N series hardware is made up of CPUs, network cards, Fibre Channel
controllers, power supplies, disk drives, and more. With MultiStore, IBM N series
storage and networking resources can be effectively partitioned and dynamically
assigned to virtual IBM N series storage systems. This virtualizes the physical
resources and moves beyond the logical architectural limitations that are inherent
in a single physical IBM N series.
As many as 32 virtual IBM N series storage systems (in addition to the hosting
IBM N series) can be created and hosted in an IBM N series storage system,
each serving data as though it were a physical IBM N series storage system.
Other network computers communicate with virtual IBM N series storage
systems as they would with any other file server (see Figure 9 on page 12).
Infrastructure Simplification with IBM System Storage N Series
11
Figure 9 Vfiler
Network Appliance SnapVault uses a client/server model to provide multiple
storage appliances with online backup and restore services. A centralized
SnapVault server (see Figure 10 on page 13) receives backup data from multiple
SnapVault clients. SnapVault controls the entire online backup process.
Snapshots are created at designated times on SnapVault clients, transferred to
the SnapVault server, and merged into the destination file system.
12
Infrastructure Simplification with IBM System Storage N Series
N series
Storage
N series
Storage
Secondary
N series
Figure 10 Backup consolidation with SnapVault
With Tivoli Storage Manager, you can also consolidate backups of multiple IBM N
series filers to a single Tivoli Storage Manager server and tape library (see
Figure 11 on page 14).
Infrastructure Simplification with IBM System Storage N Series
13
Figure 11 IBM N series backup Consolidation
Virtualization with IBM N series
IBM N series storage systems can assist you with the transition from physical file
and disk management to a more flexible virtualized environment.
There are multiple levels of virtualization layers in the IBM N series (see
Figure 12 on page 15). In this section, we discuss several of them.
14
Infrastructure Simplification with IBM System Storage N Series
Other Storage
HP Storage
19
© 2005 IBM Corporation
Figure 12 IBM N series virtualization layers
One of the first levels of virtualization with the IBM N series is at the volume level.
Flexible volumes (Figure 13) are a ground breaking technology.
Flexible Volumes
Disks
Disks
Disks
Pooled physical storage
(aggregates)
Figure 13 Flexible volumes
Infrastructure Simplification with IBM System Storage N Series
15
These volumes are logical data containers that are managed separately from
their underlying physical storage. They can be sized, resized, managed, and
moved independently and non-disruptively.
Flexible volumes are file systems that hold user data that is accessible by one or
more of the access protocols supported by Network Appliance Data ONTAP,
including Network File System (NFS), Common Internet File System (CIFS),
HTTP, FTP, Fibre Channel Protocol (FCP), and Internet Small Computer System
Interface (iSCSI). Because each flexible volume is a separate file system, you
can create one or more Snapshots of the data in a volume so that multiple,
space-efficient, point-in-time images of the data can be maintained for purposes
such as backup and error recovery.
The next level of virtualization is at the aggregate level. As shown in Figure 14,
an aggregate is defined as a pool of many disks, from which space is allocated to
volumes (shown as IBM FlexVol and FlexClone entities in Figure 14). From the
administrator’s point of view, volumes remain the primary unit of data
management. But what is not apparent to the administrator is the fact that flexible
volumes refer to logical entities, not (directly) to physical storage.
FlexVol dynamic virtualization:
Designed to offer dramatic improvement in storage management
Manage data, not disks
Applications: Tied to flexible volumes
Designed to provide:
Flexible
Volumes: Not tied to physical storage
ƒ Improved asset utilization
ƒ Better productivity
ƒ Increased performance
Disks
Disks
Disks
Pooled physical storage
(aggregates)
Figure 14 An aggregate consists of a pool of many disks from which space is allocated to
volumes
Even data duplication can be virtualized with FlexClone. A FlexClone volume is a
writable point-in-time image of a FlexVol volume or another FlexClone volume.
16
Infrastructure Simplification with IBM System Storage N Series
FlexClone volumes add a new level of agility and efficiency to storage
operations. They take only a few seconds to create and are created without
interrupting access to the parent FlexVol volume (Figure 15).
FlexClone volumes use space very efficiently, using the Data ONTAP
architecture to store only data that changes between the parent and clone. This
is a huge potential saving in dollars, space, and energy. In addition to these
benefits, clone volumes have the same high performance as other kinds of
volumes.
Figure 15 FlexClone
IBM N series also excels in logical unit number (LUN) virtualization with Unified
Multiprotocol Data Access. IBM N series virtualization technology unifies many
storage access modes in a single, easy-to-manage appliance. For example:
򐂰 A single IBM N Series storage system can virtualize SAN LUNs into CIFS,
NFS, iSCSI LUNs, and FCP LUNs. This unification provides unprecedented
economies and flexibility, opening the door to simplified storage
administration and greater returns on technology investment.
򐂰 IBM N series systems virtualize target LUNs so that the appliance can
present iSCSI and FCP LUNs to hosts. The same LUN can be presented over
iSCSI or FCP, providing simplified upgrade paths as the need for higher
Infrastructure Simplification with IBM System Storage N Series
17
performance and resiliency grows. You can resize LUNs in seconds,
simplifying allocation decisions and reducing management costs.
With Snapshots, you can also virtualize data duplication. Snapshots (Figure 16)
use a copy-on-write technique to avoid duplicating disk blocks that are the same
for a Snapshot and the active file system. Only when blocks in the active file
system are modified or removed do Snapshots that contain those blocks begin to
consume disk space. This creates a virtualized full copy of the source data.
Block 1
Snapshot
•A Snapshot is a read-only, “freeze
framed” version of a filer file
system, frozen at some past point in
time.
Block 2
•A volume can maintain up to 255
Snapshots concurrently.
•Snapshots are readily accessible
via “special” subdirectories that
appear in the current or active file
system.
Block 3
•Snapshots consume space when
the file system changes.
•Snapshots use no additional disk
space when first taken.
•Snapshots can be taken manually
or automatically on a schedule.
Figure 16 Snapshot
Users can access Snapshots through NFS to recover files that they have
accidentally changed or removed, and system administrators can use Snapshots
to create backups safely from a running system. In addition, Write Anywhere File
Layout (WAFL) uses Snapshots internally so that it can restart quickly even after
an unclean system shutdown.
At the highest level of virtualization with the IBM N series, there is the Vfiler. A
virtual storage controller is a lightweight instance of a multiprotocol server. The
physical resources of the storage system, such as system memory and CPU, are
shared between virtual storage controllers.
A virtual storage controller consists of data stored in a volume or a qtree, the IP
address(es) necessary to reach the virtual storage controller, and the security
18
Infrastructure Simplification with IBM System Storage N Series
and other attributes associated with the data. From the client systems and
management software perspective, the data is completely secure and isolated
from all other virtual storage controllers.
The benefits of Vfilers are:
򐂰 Vfilers appear in the network as discrete multiprotocol file servers and are
accessed in the same way as other Windows® or UNIX® file servers.
򐂰 Companies can deploy a Vfiler into full production in a matter of minutes with
only a few software commands.
򐂰 Each Vfiler independently controls access to its storage resources according
to its security settings and the permissions that are assigned to groups and
users by Windows, UNIX system administrators, or both.
򐂰 You can explicitly assign network settings, such as IP addresses, IP space
associations, DNS information, Windows domain, and other settings, to each
Vfiler (Figure 17).
Figure 17 Managing Vfilers
Infrastructure Simplification with IBM System Storage N Series
19
򐂰 You can replicate or move virtual storage systems and their resources to other
storage systems, dramatically simplifying data consolidation, migration, and
disaster recovery.
򐂰 You can add, remove, or move resources between virtual storage systems at
any time.
Automation with IBM N series
IBM N series helps simplify storage management by automating data duplication
with scheduled Snapshots and backups, using either SnapVault or Tivoli Storage
Manager.
Snapshot automation
Snapshots can be automated to occur weekly, daily, or hourly, depending on your
business needs (Figure 18).
Figure 18 Snapshot scheduling
20
Infrastructure Simplification with IBM System Storage N Series
SnapVault scheduling and retention
The SnapVault schedule details the frequency, the number of copies to retain,
the date, and the time for performing incremental backups for a specific
SnapVault relationship. The SnapVault secondary system creates and maintains
copies, based on the specified schedule, for each primary data set that it is
responsible for protecting.
Incremental backups can be scheduled every hour, week, or month, depending
on the needs of the environment. Backup and storage administrators have
considerable flexibility when they are defining policies for data protection. In
normal operation, updates and Snapshot creation proceed automatically,
according to the Snapshot schedule.
SnapVault also supports manual operation through basic command line and
management interface operations. This allows on demand, application-level
integration for specific applications or servers that require an application or
event-driven backup capability.
All of these scheduling options can increase the frequency of backups without an
increased requirement for baseline transfers and media cost. In most cases, you
can reduce and even eliminate traditional backup windows after performing the
the initial full backup.
Tivoli Storage Manager automation
You can schedule the backup or restore of images that Network Data
Management Protocol (NDMP) operations produce with administrative schedules
that process the BACKUP NODE or RESTORE NODE administrative
commands. The BACKUP NODE and RESTORE NODE commands can be used
only for nodes of TYPE=NAS. In Example 1, we scheduled a full backup,
including a table of contents.
Example 1 Define scheduled backup
define schedule NAS001 t=a cmd='backup node N37002 /vsimple2 mode=full
toc=yes' active=yes peru=o starttime=15:30
Autosupport
With the Autosupport feature, you can configure an IBM N series storage system
so that it initiates automatic e-mail notifications to IBM support and to other
designated addresses when specific events occur with the IBM N series storage
systems. The e-mail notification contains useful information to help technical
support teams identify and solve problems quickly and proactively.
Infrastructure Simplification with IBM System Storage N Series
21
You can also configure the IBM N series storage systems to initiate short alert
notifications of urgent events that contain only the reason for the alert to a
separate list of recipients. This feature is useful for system administrators who
read e-mail messages on alphanumeric pagers.
Each message generated by Autosupport contains the following types of
information:
򐂰 Date and time stamp of the message
򐂰 Data ONTAP software version
򐂰 System ID of the IBM N series storage system
򐂰 Host name of the IBM N series storage system
򐂰 Software licenses that are enabled for the IBM N series storage system
򐂰 Product serial number
򐂰 Simple Network Management Protocol (SNMP) contact name and location (if
specified in /etc/rc)
򐂰 Contents of the messages log
򐂰 Output of the following console commands (some are applicable only to the
licensed protocols):
–
–
–
–
–
–
–
–
–
sysconfig - p
options
ifconfig -a \
nfsstat -c
cifs stat (included if CIFS is licensed)
cifs sessions (included if CIFS is licensed)
cifs shares (included if CIFS is licensed)
httpstat
df
Conclusion
The signs of complexity are everywhere in modern data centers and modern
storage environments. If your enterprise can make the move toward
infrastructure simplification, it can contain expenses, enable business growth,
and reduce operational risk by optimizing IT resources. As part of the IBM
strategy for helping your company enable on demand information, the IBM N
series storage system can help you simplify your infrastructure and its
management.
22
Infrastructure Simplification with IBM System Storage N Series
The team that wrote this Redpaper
This Redpaper was produced by a specialist from the International Technical
Support Organization, Tucson.
Alex Osuna is a Project Leader at the International Technical Support
Organization (ITSO), Tucson center. He writes extensively and has taught IBM
classes worldwide on all areas of storage. Before joining the ITSO, Alex held
positions in systems engineering, performance, services development, product
planning, storage development, storage support, field engineering, and IT
support for the Military IBM Air Defense Computers. He holds over 10
certifications with IBM, Microsoft®, and Redhat.
Thanks to the following people for their contributions to this project:
Miroslav Klivansky and Edward Reidenbach
Network Appliance
Infrastructure Simplification with IBM System Storage N Series
23
24
Infrastructure Simplification with IBM System Storage N Series
Notices
This information was developed for products and services offered in the U.S.A.
IBM may not offer the products, services, or features discussed in this document in other countries. Consult
your local IBM representative for information on the products and services currently available in your area.
Any reference to an IBM product, program, or service is not intended to state or imply that only that IBM
product, program, or service may be used. Any functionally equivalent product, program, or service that
does not infringe any IBM intellectual property right may be used instead. However, it is the user's
responsibility to evaluate and verify the operation of any non-IBM product, program, or service.
IBM may have patents or pending patent applications covering subject matter described in this document.
The furnishing of this document does not give you any license to these patents. You can send license
inquiries, in writing, to:
IBM Director of Licensing, IBM Corporation, North Castle Drive, Armonk, NY 10504-1785 U.S.A.
The following paragraph does not apply to the United Kingdom or any other country where such
provisions are inconsistent with local law: INTERNATIONAL BUSINESS MACHINES CORPORATION
PROVIDES THIS PUBLICATION "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR
IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF NON-INFRINGEMENT,
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Some states do not allow disclaimer
of express or implied warranties in certain transactions, therefore, this statement may not apply to you.
This information could include technical inaccuracies or typographical errors. Changes are periodically made
to the information herein; these changes will be incorporated in new editions of the publication. IBM may
make improvements and/or changes in the product(s) and/or the program(s) described in this publication at
any time without notice.
Any references in this information to non-IBM Web sites are provided for convenience only and do not in any
manner serve as an endorsement of those Web sites. The materials at those Web sites are not part of the
materials for this IBM product and use of those Web sites is at your own risk.
IBM may use or distribute any of the information you supply in any way it believes appropriate without
incurring any obligation to you.
Information concerning non-IBM products was obtained from the suppliers of those products, their published
announcements or other publicly available sources. IBM has not tested those products and cannot confirm
the accuracy of performance, compatibility or any other claims related to non-IBM products. Questions on
the capabilities of non-IBM products should be addressed to the suppliers of those products.
This information contains examples of data and reports used in daily business operations. To illustrate them
as completely as possible, the examples include the names of individuals, companies, brands, and products.
All of these names are fictitious and any similarity to the names and addresses used by an actual business
enterprise is entirely coincidental.
COPYRIGHT LICENSE:
This information contains sample application programs in source language, which illustrate programming
techniques on various operating platforms. You may copy, modify, and distribute these sample programs in
any form without payment to IBM, for the purposes of developing, using, marketing or distributing application
programs conforming to the application programming interface for the operating platform for which the
sample programs are written. These examples have not been thoroughly tested under all conditions. IBM,
therefore, cannot guarantee or imply reliability, serviceability, or function of these programs.
© Copyright International Business Machines Corporation 2006. All rights reserved.
Note to U.S. Government Users Restricted Rights -- Use, duplication or disclosure restricted by
GSA ADP Schedule Contract with IBM Corp.
25
Send us your comments in one of the following ways:
򐂰 Use the online Contact us review redbook form found at:
ibm.com/redbooks
򐂰 Send your comments in an email to:
redbook@us.ibm.com
򐂰 Mail your comments to:
IBM Corporation, International Technical Support Organization
Dept. HYTD Mail Station P099, 2455 South Road
Poughkeepsie, NY 12601-5400 U.S.A.
®
Trademarks
The following terms are trademarks of the International Business Machines Corporation in the
United States, other countries, or both:
Eserver®
Eserver®
Redbooks (logo)
™
IBM®
Redbooks™
System Storage™
Tivoli®
The following terms are trademarks of other companies:
Vfiler, Snapshot, Data ONTAP, Network Appliance, WAFL, SnapVault, MultiStore, and NetApp logo are
trademarks or registered trademarks of NetApp Corporation or its subsidiaries in the United States, other
countries, or both.
Microsoft, Windows, and the Windows logo are trademarks of Microsoft Corporation in the United States,
other countries, or both.
UNIX is a registered trademark of The Open Group in the United States and other countries.
Other company, product, or service names may be trademarks or service marks of others.
26
Infrastructure Simplification with IBM System Storage N Series