HP StorageWorks NAS 8000 - Version 1.6.X User manual

solution integration
manual
hp StorageWorks NAS 8000
SAN high availability
solution integration manual (SIM)
Product Version: 1.6.0
Edition: March 2003
Part Number: A7418-96023

© Hewlett-Packard Company, 2003.
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Printed in the U.S.A.
HP StorageWorks NAS 8000 SAN High Availability Solution Integration Manual (SIM)
Edition: March 2003
Part Number: A7418-96023

3HP StorageWorks NAS 8000 SAN High Availability, Solution Integration Manual (SIM)
contents
Contents
About this Guide. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Intended Audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Related Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Document Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Getting Help. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
HP Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
HP Storage Website. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
HP Authorized Reseller. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
1 HP StorageWorks NAS 8000 SAN High Availability Solution Integration. . . . . . . . . . . . . . . . . . . . . . 7
Read Me First . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Binder Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
2 Solution Integration and
Product Configuration Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3 Network and Storage Planning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Storage Overview and Terminology. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Physical Storage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Storage Arrays. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Logical Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
SAN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Logical Unit Number. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Volume Groups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
File Volumes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Directories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Snapshots. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
High Availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Clusters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Failover Packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Data Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
RAID Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Active Spare . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
HA Storage Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Port Designation and Enumeration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Integrated Lights-Out (iLO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
NIC Ports. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Contents
4HP StorageWorks NAS 8000 SAN High Availability, Solution Integration Manual (SIM)
Planning Worksheets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Available Disk Space Spreadsheets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Storage Planning Worksheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
HA Planning Worksheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Network Planning Worksheet Node 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Network Planning Worksheet Node 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
4 Installation Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
1. Review the Planning Worksheets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
2. Check the Contents of Each Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
System Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
Shipping Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
3. Rack the Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
Safety Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
4. Connect the Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
Connect a Tape Library (optional). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
Connect Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
5. Define Basic Network and HA Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
Configure the Quorum server. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
Configure the NAS servers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
6. Run the Command View NAS Configuration Wizard. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
7. Build the Storage System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
Create and Configure LUNs on the SAN-attached Storage Arrays. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
Scan for Storage and Confirm Available Space. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
Create Volume Groups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
Create and Start Failover Packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
Create File Volumes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
Assign Shared Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
8. Enable the Software Modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
Next Steps. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
Installing Additional Software. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
Using the System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
Where to Go for Help. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
5 Safety and Regulatory Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

5HP StorageWorks NAS 8000 SAN High Availability, Solution Integration Manual (SIM)
about this guide
About this Guide
About this Guide
This installation guide provides information to help you:
■install your customer’s HP StorageWorks NAS 8000 system.
■configure your customer’s HP StorageWorks NAS 8000 system.
Intended Audience
This guide is intended for use by system administrators, technicians, and HP on-site service
representatives, who are experienced with HP StorageWorks NAS 8000 systems.
Related Documentation
In addition to this guide, HP provides HP StorageWorks NAS 8000 1.6.0 Release Notes.
Document Conventions
The document conventions included in Table 1 apply in most cases.
Getting Help
If you still have a question after reading this guide, contact an HP authorized service provider
or access our website:
www.hp.com/support/nas8000 .
Table 1: Document Conventions
Element Convention
Cross-reference links Blue text: Figure 1
Key and field names, menu items,
buttons, and dialog box titles Bold
File names, application names, and text
emphasis Italics
User input, command and directory
names, and system responses (output
and messages)
Monospace font
COMMAND NAMES are uppercase
monospace font unless they are case
sensitive
Variables <monospace, italic font>
Website addresses Blue, underlined sans serif font text:
http://www.hp.com

About this Guide
6 HP StorageWorks NAS 8000 SAN High Availability, Solution Integration Manual (SIM)
HP Technical Support
In North America, call technical support at 1-800-652-6672, available 24 hours a day, 7 days a
week.
Note: For continuous quality improvement, calls may be recorded or monitored.
Outside North America, call technical support at the nearest location. Telephone numbers for
worldwide technical support are listed on the HP website under support:
http://thenew.hp.com/country/us/eng/support.html .
Be sure to have the following information available before calling:
■Technical support registration number (if applicable)
■Product serial numbers (NAS 8000 and arrays in question)
■Product model names and numbers
■Applicable error messages
■Operating system type and revision level (from Command View NAS Identity page)
■Detailed, specific questions
HP Storage Website
The HP website has the latest information on this product, as well as the latest drivers. Access
storage at:
http://thenew.hp.com/country/us/eng/prodserv/
storage.html . From this website, select the appropriate product or solution.
HP Authorized Reseller
For the name of your nearest HP authorized reseller:
■In the United States, call 1-800-345-1518
■In Canada, call 1-800-263-5868
■Elsewhere, see the HP website for locations and telephone numbers: http://www.hp.com .

7HP StorageWorks NAS 8000 SAN High Availability, Solution Integration Manual (SIM)
1
HP StorageWorks NAS 8000
SAN High Availability
Solution Integration
Read Me First
This binder includes the details of the integration tasks that Hewlett-Packard or an authorized
reseller has performed:
■The first section, Solution Integration and Product Configuration Overview, gives you a
detailed picture of the solution you ordered from Hewlett Packard. Depending on the
system you ordered, and through whom it was purchased, you will either receive
system-specific configuration information or sample configuration information.
■The remaining sections of this binder will be used by you or your installation specialist,
who will work with you to plan and install your HP Network Attached Storage (NAS)
8000 system according to your specific requirements.
Before installing the HP StorageWorks NAS 8000 solution, you must first complete the items
in the Network and Storage Planning section of this binder. If your installation specialist has
not done so already, he or she will contact you to schedule a joint planning session.
After the planning is complete, your installation specialist will perform tasks specified in this
binder’s “Installation Guide” section.
We sincerely hope that you will be delighted with our integration services, and we are looking
forward to hearing from you.

HP StorageWorks NAS 8000 SAN High Availability Solution Integration
8 HP StorageWorks NAS 8000 SAN High Availability, Solution Integration Manual (SIM)
Binder Contents
This binder contains the following sections:
Section Audience Purpose
1. HP StorageWorks NAS 8000
SAN High Availability Solution
Integration
Customer IT administrator Introduction
2. Solution Integration and
Product Configuration
Overview
Customer IT administrator Product information
3. Network and Storage Planning Installation specialist and customer
IT administrator Pre-installation planning session
4. Installation Guide Installation specialist Hardware installation and software
configuration
5. Safety Installation specialist and customer
IT administrator Warnings and regulatory information

9HP StorageWorks NAS 8000 SAN High Availability, Solution Integration Manual (SIM)
2
Solution Integration and
Product Configuration Overview
This section contains the following documents, which are either sample documents (labeled as
such), or were customized for your system and inserted by the Integration Center:
■Deployment information
■Rack, server and component configurations
■Parts list
■Network, cabling, and power connection diagrams
Figure 1: HP StorageWorks NAS 8000 Racked System
Sample high availability solution shown here.

Solution Integration and Product Configuration Overview
10 HP StorageWorks NAS 8000 SAN High Availability, Solution Integration Manual (SIM)
Figure 2: Sample Configuration—NAS 8000 SAN HA
For information on NIC ports, see NIC Ports on page 19 of this manual.

11HP StorageWorks NAS 8000 SAN High Availability, Solution Integration Manual (SIM)
3
Network and Storage Planning
This section contains pre-planning materials that the installation specialist can review with the
customer before the HP StorageWorks NAS 8000 system arrives onsite.It includes:
■System Overview, a conceptual overview of the storage system of the HP StorageWorks
NAS 8000 solution, including:
— Storage Overview and Terminology
— HA Storage Configuration
■Planning Worksheets, where you can record network and storage settings for the NAS
8000 system. The information in the planning worksheets is required to install and
configure the system.
— Determining Available Disk Space
— Storage Planning
— High Availability Planning
—NetworkPlanning
You need to construct an overall storage architecture by:
1. Determining the amount of total storage available.
2. Deciding how to allocate it to different groups or functions.
Storage space is spread across volume groups. In these volume groups, file volumes divide the
disk space. It is important to plan storage space prior to creating file volumes. Although the
NAS 8000 lets you expand volume groups later, you may want to reserve extra space during
setup to allow for the use of the backup process via snapshots (integrated into the user
interface). For more information, see Snapshots on page 13.

Network and Storage Planning
12 HP StorageWorks NAS 8000 SAN High Availability, Solution Integration Manual (SIM)
Storage Overview and Terminology
The NAS 8000 is an easy-to-manage storage solution for heterogeneous environments
including Windows, UNIX, and Linux.
The storage space on the NAS 8000 is made up of physical and logical storage:
■Physical storage refers to the hardware you use for data storage.
■Logical storage is created by software that organizes your physical storage into file
volumes and directories that are made accessible to users.
In addition, the HA configurations include high-availability features such as redundant
hardware and failover packages.
Physical Storage
Storage Arrays
The NAS 8000 configurations can access storage on a variety of devices within a SAN device,
including the HP Virtual Array 7100 and 74xx series, and HP XP series disk arrays using
SecureManager VA or SecureManager XP. The HP NAS 8000 also supports connection to the
EMA array. Contact your local sales representative for more details.
HP Secure Manager Virtual Array is an array-based software product that allows LUNs to be
locked into secure protected volumes by World Wide Names (up to 128 secure World Wide
Name connections per virtual array), ensuring that only authorized World Wide Names
(WWN) have access to restricted volumes.
Logical Storage
SAN
A SAN, or Storage Area Network, is a high-speed special-purpose network (or subnetwork)
that connects different kinds of storage devices with associated data servers on behalf of a
larger network of users. Typically, a SAN is part of the overall network of computing resources
in a company. SAN devices are usually close to other computing resources, but may also
extend to remote locations for backup and archival storage. NAS 8000 SAN solutions can
access storage on supported devices within the SAN.
SecureManager VA or XP maintains LUN level security so that the storage given to the NAS
Server is not used by other servers connected to the storage pool. See Physical Storage on
page 12. For EVAs and EMAs, you can maintain security by using HP StorageWorks
SecurePath.
Note: HP does not currently support third party storage products — only EMA, EVA, VA, and XP
arrays in an HP-approved SAN topology.
Logical Unit Number
A logical unit number (LUN) is a logical aggregation of space on physical drives. LUNs are
unique identifiers that enable the controller to differentiate between separate devices (each of
which is a logical unit). Each LUN is a unique number that identifies a specific unit of storage.
The NAS 8000 supports up to 128 LUNs.

Network and Storage Planning
13HP StorageWorks NAS 8000 SAN High Availability, Solution Integration Manual (SIM)
Volume Groups
A volume group is the aggregation of one or more LUNs. Volume groups combine the space
from LUNs and make the space accessible to the file system for creating file volumes and
directories, which can then be made accessible to users.
File Volumes
A volume group is divided into one or more file volumes. File volumes are the basic unit of
logical storage for a file system on the NAS 8000. File volumes can be further subdivided into
individual directories.
Directories
Directories let you organize information. Directories contain files or other persistent data
structures in a file system that contains information about other files. Directories are usually
organized hierarchically and may contain both files and other directories, and are used to
organize collections of files for applications or convenience.
Snapshots
A snapshot is a read-only virtual copy of a file volume at a specific point in time. As such, it is
an important part of an overall data-protection plan. Snapshots provide nearly instantaneous
access to previous versions of a file stored on the NAS 8000 solution.
When you create a snapshot of a file volume, it initially consumes no physical space. However,
as users modify the file volume, the snapshot tracks all changes between the original file
volume and the modified file volume. If an error occurs and a user needs to revert to the
previous version, the snapshot version of the file can be restored.
When you create a snapshot, you must allocate storage space in the volume group in which to
save the snapshot file volume. The recommended initial allocation is 10% of the size of the file
volume on which you are using snapshot.
Keep in mind the following when managing your allocated space:
■You can increase the amount of space allocated to the snapshot, as long as there is space
available on the volume group.
■If the allocated space fills during a snapshot’s existence, you can no longer view or extend
the allocated space. An incomplete snapshot has been captured, and therefore, should be
deleted. The snapshot will be deleted automatically only upon reboot or package failover.
■Consider how dynamic your data will be. For file volumes in which data changes rapidly,
snapshots will consume a larger amount of space. At the extreme limit, a file volume can
change so much from the original state that the snapshot consumes the same amount of
space as the original file volume. Typically, data does not change that rapidly, and the
usage and growth of snapshot space is relatively slow.
■You may also use the autogrow feature, which allows you to allocate a small amount of
space initially, then instruct the system to increase the size of the allocated space on an
as-needed basis. Ensure that the autogrow threshold is set low enough that it can keep up
with the rate of change in the snapshot files. If the data change rate is greater than the rate
at which the autogrow feature is responding, the allocated space can fill up, thereby
capturing an incomplete snapshot as described above.

Network and Storage Planning
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Note: If you take a snapshot of an empty file volume, every file added to that volume will be
duplicated in the snapshot. This will require you to allocate a much larger storage space than you
would otherwise need.
Snapshots are optional and may be created at any time after a file volume is created. Users can
add or extend snapshots at a later time if there is enough free space available in the volume
group.
High Availability
The NAS 8000 SAN high availability solution includes a cluster, or group, of two NAS servers
that function as a unified system. It also includes a Quorum server.
The main purpose of high-availability clusters is to provide a higher degree of storage
availability to client systems than is possible with a single server. This is accomplished by
eliminating single points of failure and providing functional redundancy. Uninterrupted
service is provided by failing over file serving capabilities (see Failover Packages on page 14)
to a secondary server in the event of a failure in the primary server in the cluster.
■The NAS servers provide failover services for each other.
■The Quorum server manages the NAS servers, or cluster nodes, and provides cluster
arbitration services that prevent data corruption.
Clusters
HA clusters provide a higher degree of storage availability than is possible with a single server.
This is provided by:
■Hardware component redundancy designed to eliminate single points of failure. Each
cluster consists of two NAS servers (nodes) plus one Quorum server. The Quorum server
can be shared by multiple NAS Clusters.
■All storage is grouped into separate units that are given names and are accessible only by
an assigned, unique virtual IP address. These separate units of storage are referred to as
failover packages. Storage is assigned to a failover package in units of volume groups. A
failover package may have one or more volume groups assigned to it.
Note: HP currently supports a two-node cluster for the HP NAS 8000 solution.
See the HP support web site at http://hp.com/support/nas8000 for a technical paper called
Configuring and Using an HP NAS 8000 HA Cluster for more information.
Failover Packages
When a package failure is detected, the failover package is halted and fails over to another
node, provided that an eligible adoptive node is present. Each failover package and its
associated resources are monitored independently. This allows failures that are limited to a
single failover package to be handled without affecting the state of other failover packages.

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The NAS solution supports two failover models:
■Active/Active (or “Dual Active”) means that both cluster nodes can be serving data
simultaneously. The nodes provide failover services for each other, but can be fully
utilized at all times. This mode is achieved by configuring failover packages to run on both
cluster nodes – effectively dividing the storage between the nodes.
■Active/Passive (or “Single Active”) means that one node is actively serving data while the
other node is in full-time stand-by mode, becoming active only when the other node fails.
This mode can be realized by configuring all of the failover packages and storage to run on
only one node. Without any failover packages to run, the other node waits and monitors
the other node for failure.
Data Protection
RAID Levels
Redundant Array of Inexpensive Disks (RAID) technology uses different industry-standard
techniques for storing data and maintaining data redundancy. These techniques, called “RAID
levels,” define the method used for distributing data on the disks in a logical unit (LUN). The
storage arrays used in the NAS 8000 solution support the following RAID levels:
■RAID 1+0. RAID 1+0 provides data redundancy and good performance. However, the
performance is achieved by using a less efficient technique of storing redundant data
called “mirroring.” Mirroring maintains two sets of the data: a primary set and a backup
set, or “mirror,” of the primary set. Therefore, half of the disk space is consumed by
redundant data.
■AutoRAID. AutoRAID is a combination of RAID 1+0 and 5DP (RAID 5 Double Parity).
RAID 5DP provides data redundancy and improves cost-efficiency by using a more
efficient method of storing redundant data. However, there is a performance penalty for
each write operation.
AutoRAID relieves you of many of the decisions regarding RAID levels and data location
by automatically selecting RAID 1+0 or RAID 5DP depending on the usage patterns of
the data. AutoRAID automatically manages your data for you, providing redundancy and
high performance with minimal involvement. This configuration eliminates the
requirement for the system administrator to understand and configure RAID levels.
Note: The information for AutoRAID presented here applies to VA arrays only.
For additional information on RAID settings, see your storage array user’s guide or search for
RAID levels at
http://www.hp.com .
Active Spare
The active spare feature in the storage array offers increased protection against disk failure. An
active spare ensures that the array can restore data redundancy and performance as quickly as
possible following a hard disk failure.
An active spare reserves capacity to perform a rebuild in the event of a disk failure. If you are
using disks of different capacities in your array, active spare reserves enough space to rebuild
the largest disk. As with logical volumes, the capacity reserved for the active spare is
distributed across all the disks in the array; no one physical disk contains the active spare.

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Active spare is similar to the dedicated hot spare disks used in some conventional arrays.
However, those arrays let the hot spare remain idle until it is needed. This array uses the active
spare for RAID 1+0 storage until the spare is needed. This provides the added benefit of
enhancing performance while also protecting against disk failure.

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HA Storage Configuration
This section provides suggestions for configuring the storage on an NAS 8000 with
high availability (HA) features. For a description of HA, see Physical Storage on page 12.
On a simple dedicated-storage NAS system without HA features, the simplest way to
configure the storage is to create a single LUN for the entire array, then create one volume
group with multiple file volumes beneath it. However, in an HA cluster with two NAS servers,
each volume group can be active on only one NAS server, or node, at a time. Therefore, if you
are using active/active failover packages (see Failover Packages on page 14), you must create
at least two volume groups so each node can access some of your storage.
In addition, with SAN configurations storage generally resides on several different storage
devices within the SAN. LUNs are created on each array using the SAN management
software. To ensure that a volume group does not become unavailable due to hardware
problems on a specific storage device, the safest configuration is to create a separate volume
group for each LUN.
Note: When a volume group includes LUNs from multiple arrays, if any one array has a hardware
failure, the entire volume group will be unavailable. By creating a separate volume group for each
LUN, you are ensuring that only that portion of the storage residing on the failed array will be
unavailable until the array is restored. All other storage will remain unaffected.
When determining how many LUNs and volume groups to create, consider the following:
■A volume group can be active on only one node at a time.
■A volume group can be assigned to only one failover package.
■File volumes can’t be split between failover packages or nodes.
■Multiple volume groups can be assigned to the same failover package.
■A failover package can only run on one node at a time.
■The HA cluster is limited to 60 failover packages total (both nodes combined).
■A package is the smallest unit of failover.
■A volume group is the smallest unit of storage that can be failed over.
■If a failover package contains multiple volume groups and a single volume group, file
volume or even share fails, the entire package will be failed over.
■More failover packages means a higher degree of granularity to balance the failover
packages between the nodes and detect failures.
■More failover packages also results in higher complexity in the cluster configuration and
requires more virtual IP addresses to keep track of.
■The failover packages should be divided between the cluster nodes such that the storage
access load (from client systems) will be balanced. This may or may not correspond to
balanced storage capacity between the nodes.
The illustrations on the following pages depict common storage configurations:
■One LUN and one volume group (for active/passive failover).
■Multiple LUNs, volume groups and failover packages (most common for SAN
configurations).

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Figure 3: One LUN and One Volume Group for Active/Passive Failover
Figure 4: Multiple LUNs, Volume Groups and Failover Packages
Port Designation and Enumeration
Integrated Lights-Out (iLO)
The server's on-board NIC is dedicated to the Integrated Lights Out (iLO) controller. The iLO
is a management chip embedded in the NAS 8000 server. The iLO features are accessed from
a network client using a web browser. This allows an administrator to fully control the host
server's display (with keyboard and mouse control) from a remote location, regardless of the
state of the host server or the host server's operating system. Consequently, you can install,
configure, monitor, update, and troubleshoot your NAS 8000 from a desktop located
anywhere.
Note: A separate network data line and IP address are required to use the iLO.

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NIC Ports
There is a method to NIC port enumeration on the NAS 8000. Understanding these allows the
correlation of NIC ports logical names (i.e. ‘ethX’) to physical port locations.
Supported NICs are as follows:
■NC3134 (138603-B21) Expandable dual-port 10/100 - included in all configurations
■NC3135 (138604-B21) Dual-port 10/100 upgrade for NC3134
■NC7770 (244948-B21) Single-port PCI-X gigabit copper
■NC7132 (153543-B21) Single-port gigabit copper upgrade for NC3134
■NC6770 (244949-B21) Single-port PCI-X 1000SX gigabit fiber
■NC6132 (338456-B23) Single-port 1000SX fiber upgrade for NC3134
The following enumeration table provides information for specific configurations.
Table 2: Enumerations for Various Configurations
PCI Slot 3 Names
Exp
Module Names PCI Slot 4 Names
Exp
Module Names
Total
Ports
NAS 8000 customer-configuratble options
NC3134 eth0, eth1 Empty - Empty - N/A - 2
NC3134 eth0, eth1 NC7132 eth3 NC7770 eth2 N/A - 4
NC3134 eth0, eth1 NC6132 eth3 NC6770 eth2 N/A - 4
NC3134 eth0, eth1 Empty - NC3134 eth2, eth3 Empty - 4
NC3134 eth0, eth1 NC3135 eth2, eth3 Empty - N/A - 4
NC3134 eth0, eth1 NC3135 eth2, eth3 NC3134 eth4, eth5 Empty - 6
NC3134 eth0, eth1 NC3135 eth2, eth3 NC3134 eth4, eth5 NC3135 eth6, eth7 8
NC3134 eth0, eth1 NC7132 eth3 NC6770 eth2 N/A - 4
NC3134 eth0, eth1 NC6132 eth3 NC7770 eth2 N/A - 4
NC3134 eth0, eth1 Empty - NC7770 eth2 N/A - 3
NC3134 eth0, eth1 NC7132 eth2 Empty - N/A - 3
NC3134 eth0, eth1 Empty - NC6770 eth2 N/A - 3
NC3134 eth0, eth1 NC6132 eth2 Empty - N/A - 3
NC3134 eth0, eth1 NC3135 eth2, eth3 NC7770 eth4 N/A - 5
NC3134 eth0, eth1 NC3135 eth2, eth3 NC6770 eth4 N/A - 5
NC3134 eth0, eth1 NC7132 eth4 NC3134 eth2, eth3 Empty - 5
NC3134 eth0, eth1 NC6132 eth4 NC3134 eth2, eth3 Empty - 5
NC3134 eth0, eth1 Empty - NC3134 eth2, eth3 NC7132 eth4 5
NC3134 eth0, eth1 Empty - NC3134 eth2, eth3 NC6132 eth4 5
NC3134 eth0, eth1 NC3135 eth2, eth3 NC3134 eth4, eth5 NC7132 eth6 7
NC3134 eth0, eth1 NC3135 eth2, eth3 NC3134 eth4, eth5 NC6132 eth6 7
NC3134 eth0, eth1 NC7132 eth6 NC3134 eth2, eth3 NC3135 eth4, eth5 7
NC3134 eth0, eth1 NC6132 eth6 NC3134 eth2, eth3 NC3135 eth4, eth5 7
NC3134 eth0, eth1 NC7132 eth4 NC3134 eth2, eth3 NC7132 eth5 6

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The following figure shows the physical port locations for the supported configurations, as
viewed from the back of the NAS server.
Figure 5: Port Locations for Supported Configurations on the NAS Server
NC3134 eth0, eth1 NC6132 eth4 NC3134 eth2, eth3 NC6132 eth5 6
NC3134 eth0, eth1 NC7132 eth4 NC3134 eth2, eth3 NC6132 eth5 6
NC3134 eth0, eth1 NC6132 eth4 NC3134 eth2, eth3 NC7132 eth5 6
Table 2: Enumerations for Various Configurations (Continued)
PCI Slot 3 Names
Exp
Module Names PCI Slot 4 Names
Exp
Module Names
Total
Ports