HP NetRAID-1M, NetRAID-2M Installation And Configuration Manual

HP NetRAID-1M and NetRAID-2M

Installation and Configuration Guide

HP Part Number 5971-0808

Printed in December 2000

Notice

The information contained in this document is subject to change without notice.

Hewlett-Packard makes no warranty of any kind with regard to this
material, including, but not limited to, the implied warranties of
merchantability and fitness for a particular purpose. Hewlett- Pack ard shall

not be liable for errors contained herein or for incidental or consequential
damages in connection with the furnishing, performance, or use of this material.

Hewlett-Packard assumes no responsibility for the use or reliability of its software
on equipment that is not furnished by Hewlett-Packard.

This document contains proprietary information that is protected by copyright.
All rights are reserved. No part of this document may be photocopied,
reproduced, or translated to another language without the prior written consent of
Hewlett-Packard Company.

Microsoft, Windows 2000, Windows NT, and Win dows 95/98 are registered
trademarks of Microsoft Corporation in the U.S. and other countries. Novell and
NetWare are regist ered tr ademarks of Novell, Incorporated. SC O , SCO
OpenS erver, a nd Unix Ware are regis tered trademarks of The Sant a Cruz
Operation, Incor p orated. Linux is a reg istered trademark of Li nus Tor va ld.
Intel i960RM and i960RN are trademarks of Intel Corporation. T orx i s a
regi s tered trademark of CamCar/Textr on, In corporated. 3M i s a trad emark of
3M.

Hewlett-Packard Company
Network Server Division
Technical Communications/MS 45SLE
10955 Tantau Avenue
Cupertino, CA 95014 USA

© Copyright 2000, Hewlett-Packard Company.

Audience Assumptions

This Installation and Configuration Guide is for the person who installs,
administers, and troubleshoots LAN servers. Hewlett-Packard Company assumes
you are qualified in th e servicing of computer equipment and tra i ned in
recognizing hazards in products with hazardous energy levels.

ii

Contents

1 Introduction................................................................................................. 1

HP NetRAID-1M and 2M A dapters................................................................. 1

Features of the HP NetRAID-1M and 2M Adapters........................................ 1

Channels and Devices............................................................................... 1

Adapter Hardware and Batt er y - bac k ed Cac he ........................................... 4

SCSI Termination and F irmware ............................................................... 5

New Features of HP NetR A ID-1M and 2M Adapters.................................. 5

Physical Disk Roaming and Data Migration ............................................... 6

Fault-Tolerance and Management Features .............................................. 7

Changing Capacit y and RAID Level s......................................................... 7

About This Guide........................................................................................... 8

Other Information Sources.............................................................................8

Tools You May Need..................................................................................... 9

2 RAID Overview........................................................................................... 11

RAID Overview ........................................................................................... 11

Physical Drives........................................................................................ 11

Arrays...................................................................................................... 11

Hot Spares.............................................................................................. 12

Logical Drives ......................................................................................... 12

Understanding RAID Levels......................................................................... 13

Arrays with No Redundancy: RA ID Level 0.............................................. 14

Basic Arrays with Redundanc y : RAID Levels 1 and 5.............................. 15

Spanned Arrays: RAID Levels 10 and 50................................................. 17

3 Installation and Configuration Overview................................................. 23

4 Planning..................................................................................................... 25

Overview..................................................................................................... 25

Step A. Plan Your Hardware........................................................................ 25

Gather Information.................................................................................. 25

Sample Worksheet A............................................................................... 26

Multi ple Adapters..................................................................................... 27

Boot Order .............................................................................................. 27

Channels................................................................................................. 27

Step B. Plan Arrays and Logical Drives ....................................................... 28

iii

Contents

Automatic Configuration.......................................................................... 28

Custom Configuration.............................................................................. 29

5 Installation and Configuration.................................................................. 39

Overview..................................................................................................... 39

Step C. Prepare the Adapter........................................................................ 39

Plug-In Battery Backup Unit..................................................................... 40

Step D. Install the Adapter........................................................................... 42

Turn Off the HP Netserver and Open It ................................................... 42

Install the Adapter ................................................................................... 43

Step E. Install Cables..................................................................................44

Connect Cables....................................................................................... 44

Replace Cover ........................................................................................ 46

Step F. Start HP Netserv er Navigat or to Launch HP NetRAID Assistant ..... 46

Boot HP Netserver Navigator CD-ROM................................................... 46

Boot Messages........................................................................................ 46

Select Disk Array Controller Configuration............................................... 46

Step G. Configure Arrays and Logi c al Driv es............................................... 47

HP NetRAID Assistant............................................................................. 48

Select Adapter to Confi gur e..................................................................... 50

Clear Configuration.................................................................................50

Check Rebuild Rate................................................................................. 51

Assign Global Hot Spares........................................................................ 51

Select Wizard.......................................................................................... 52

Define P hy sical Arrays and Dedicat ed Hot Spares................................... 53

Define Logical Drives.............................................................................. 56

Preview Configuration............................................................................. 59

Step H. Save Configur ation and Initialize .................................................... 61

Save to Binary File.................................................................................. 61

Print Configuration .................................................................................. 62

Configur e A ny Other Adapters................................................................. 62

Initialize Logic al Driv es ............................................................................ 62

Exit HP NetRAID Assistant...................................................................... 63

6 HP NetRAID Software................................................................................ 65

Overview..................................................................................................... 65

Step I. Use HP Net s er v er Nav igator CD-ROM to Prepare Diskettes............. 67

Check Latest Versions............................................................................. 68

iv

Contents

Create Drivers Diskette and I nstr uc tions.................................................. 68

Make NOS-specific Configuration Utility Diskette.................................... 70

Print NOS Installation Instructions........................................................... 71

Step J. Install NOS and HP NetRAID Driver s .............................................. 72

Install Network Operating System (If Necessary)..................................... 72

Install HP NetRAID-1M or 2M Driver ....................................................... 72

Step K. Install NOS-specific Configuration Utility ......................................... 73

Step L. Run HP NetRAID Express Tools...................................................... 75

To Start HP NetRAID Express Tools....................................................... 76

To Disable the HP NetRAID BIOS........................................................... 76

To Change the SCSI Transfer Rate.........................................................76

To Exit HP NetRAID Express Tools ......................................................... 77

Run Other Utilities, If Necessary.............................................................. 77

7 Preparing for Online Capacity Expansion ............................................... 79

Step M. Prepare for Online Capacity Expansion.......................................... 79

Preparing for Online Capac ity Expansion under NetWare 4. 2...................... 80

About Capacit y Expansion under NetWare 4.2........................................80

Planning for Onli ne Capac ity Expansion under NetWare 4. 2 ................... 82

Preparation Steps for NetWare 4.2.......................................................... 83

Preparing for Online Capac ity Expansion under NetWare 5. x...................... 87

About Capacit y Expansion under NetWare 5.x ........................................ 87

Planning for Onli ne Capac ity Expansion under NetWare 5. x ................... 87

Preparation Steps for NetWare 5.x.......................................................... 88

Preparing for Online Capac ity Expansion under Windows NT...................... 90

About Capacit y E xpansion under Windows NT........................................ 90

Preparation S teps for Windows NT.......................................................... 91

Preparing for Online Capac ity Expansion under Windows 2000................... 94

About Capacit y Expansion under Windows 2000..................................... 94

Preparation Steps for Windows 2000....................................................... 95

8 Upgrading to an HP NetRAID-1M or HP NetRAID-2M Adapter................ 99

Back Up Your Data.....................................................................................100

Load the Appropriate HP NetRAID Driver...................................................100

Insert the New Adapter and Restore the RAID Settings...............................100

Hard Drive Migration Between Controllers..................................................104

Forward Migration ..................................................................................104

Backward Migration................................................................................105

v

Contents

9 Managing Servers Over the Network.......................................................107

Adapter Management.................................................................................107

Features.................................................................................................107

NOS Requirements................................................................................107

Other Requir ements...............................................................................109

Understanding HP NetRAID Network Utilities .............................................109

Determine where to Install HP NetRAID Assistant ..................................110

Identify the Registrat ion Server/Client ....................................................110

HP NetRAID Network Utilities to Install...................................................110

Make the Installation Disk, If Necessary .....................................................112

Microsoft Windows NT or Windows 2000 Client or Server Installation

Instructions.................................................................................................114

Run Setup..............................................................................................114

Follow On- screen Instructions for Windows............................................114

Edit the r egserv.dat and hosts Fi les........................................................116

Finishing Up...........................................................................................116

Novell NetWare Server Installation Instructions..........................................117

Using HP NetRAID Assistant to Manage Serv er s........................................118

Before Starting HP NetRAID Assistant....................................................118

Start HP NetRAID Assistant....................................................................119

Select Another Server - A dapter Pair........................................................121

Exit HP NetRAID Assistant.....................................................................121

10Understanding HP NetRAID Utilities.......................................................123

HP NetRAID Assistant................................................................................123

HP NetRAID Config....................................................................................124

HP NetRAID Express Tools........................................................................125

HP NetRAID Monitor Utilities......................................................................126

11HP NetRAID-2M Battery Backup Unit ......................................................127

Charging the Battery...................................................................................127

Checking the Status of the Battery Backup Unit..........................................127

To Check Battery Status with HP NetRAID Express Tools......................127

To Check Battery Status with HP NetRAID Config..................................128

War nings That Battery Needs Repl ac ement...........................................128

Changing the Battery Backup Unit..............................................................128

Connecting the B attery Backup Unit ...........................................................128

Battery Specifications.................................................................................129

Charge Time for Battery Packs...............................................................129

vi

Contents

Battery Life.............................................................................................129

Retention Time for Cache Memory.........................................................129

12Monitor Alert List......................................................................................131

Microsoft Windows NT and Windows 2000.............................................131

Novell NetWare Monitor Messages ........................................................131

SCO OpenServer and UnixWare Monitor Messages ..............................132

13Alarm Control and Audible Warnings.....................................................133

14Troubleshooting.......................................................................................135

Power-up (Boot) Err or M essages................................................................135

Other BIOS Error Messages.......................................................................140

Other Troubleshooting................................................................................142

Troubleshooting Management Over the Network........................................144

Common Problems.................................................................................144

15Warranty and Support..............................................................................147

Hardware Accessories Limited Warranty....................................................147

Hewlett-Packard Hardware Accessories..................................................147

Third-Party Hardware Products...............................................................148

HP Repair and Telephone Support.............................................................148

U.S. and Canada....................................................................................148

Other Countries......................................................................................148

World Wi de Web........................................................................................148

A Adapter Specifications.............................................................................149

HP NetRAID-1M Specifications..................................................................149

HP NetRAID-2M Specifications..................................................................150

B Regulatory Information............................................................................151

Notice for USA ...........................................................................................151

FCC Radio Frequency Emissions Statements ........................................151

Notice for Taiwan...................................................................................153

Statem ent Required for E ur opean Union: ...................................................153

Declaration of Confor mity (US and EU) ..................................................154

C Worksheets...............................................................................................155

Configur ation W or k sheets ..........................................................................155

Sample Configuration Worksheets .............................................................160

Physical Arrays and Hot Spares .............................................................162

Logical Drives ........................................................................................162

vii

Contents

Glossary........................................................................................................163

Disk Array T er ms and Technologies ...........................................................163

Index..............................................................................................................171

viii

1 Introduction

HP NetRAID-1M and 2M Adapters

The HP NetRAID-1M (P3410A) and HP NetRAID-2M (P3411A with 64-MB
cache memory, P3475A with 128-MB cache memory) adapters provide an
interface between the host system an d a disk a rray storage system. The adapters
use the PCI (Peripheral Component Interconnect) standard to control data
trans fe rs on one or two SCSI channel s .

The HP NetRAID-1M and 2M adapters support th e same operating systems as
the HP Netservers do. Refer to your HP Netserver documentation for the
operating systems supported on your server.

CAUTION To use the HP NetRAID-1M or HP NetRAID-2M ada p t er,

you must make sure that you have the adapter’s latest version
of firmware. The latest version of firmware for each HP
NetRAID-1M or 2M adapter can be downloaded from the HP
web site at:

http://netserver.hp.com/netserver/

Features of the HP NetRAID-1M and 2M Adapters

The HP NetRAID-1M an d HP NetRAID-2M a dapters ar e high-per formance,
intelligent PCI-to-SCSI host adapters with RAID control capabilities. The HP
NetRAID-1M and 2M adapters have SCSI channels with both internal and
exter nal connections.

Channels an d Dev ices

HP NetRAID-1M and 2M adapters support channels with both int er nal and
exter nal SC S I connectors. Th e internal connector s are used to connect disk dr ives
that are in the same Netserver chassis where the NetRAID adapter is located. The
exter nal connector s are used t o connect disk drives that are i n an ex ternal disk
enclosu re, such as the HP Rack Storage/12.

You can make eit her on e i nternal connection or one ex t ernal connection for ea ch
channel, but not both at the same time.

1

Chapter 1 Introduction

HP NetRAID-1M

The HP NetRAID-1M adapter supports one SCSI channel using either an
intern a l or a n external connection. The HP NetRAID-1M adapter supports:

• Fast/Wide SCSI (at data transfer rates of up to 20 MB/sec per channel)

• Ultra/Wide SCSI (at data transfer rates of up to 40 MB/sec per channel)

• Ultra2 SCSI (at data transfer rates of up to 80 MB/sec per channel)

• Ultra3 SCSI (at data tr a nsfer rat es of up to 160 MB/sec per channel)

The HP NetRAID-1M adapter supports a maximum of six or twelve devices per
channel.

Number Disk Drives That Can Be Connected to the

HP NetRAID-1M

Channel Using Inter nal

Connector

0

* External storage with HP Rack Storage/12 supports a maximum of 12 Ultra3 SCSI disk
drives.

6 or fewer

Using External

Connector*

12 or fewer

HP NetRAID-1M External S CSI Cables

External Device Length of

External SCSI Cable

Cable

HP Rack Storage/12 5 m eters D6982A
HP Rack Storage/12 10 meters D6983A

If th e necessar y cabl es were not sup plied wit h your system, s ee HP’s Order
Assistant for ordering information. Order Assistant is available on the Internet

http://netserver.hp.com/netserver/.

at:

2

Chapter 1 Introduction

HP NetRAID-2M

The HP NetRAID-2M adapter has two channels with both internal and external
connections. The HP NetRAID-2M adapter supports:

• Fast/Wide SCSI (at data transfer rates of up to 20 MB/sec per channel)

• Ultra/Wide SCSI (at data transfer rates of up to 40 MB/sec per channel)

• Ultra2 SCSI (at data transfer rates of up to 80 MB/sec per channel)

• Ultra3 SCSI (at data tr a nsfer rat es of up to 160 MB/sec per channel)

The HP NetRAID-2M adapter supports a maximum of six or twelve disk drives
per channel.

Number of Di sk Drives That Can Be Connected to the

HP NetRAID-2M

Channel Using Inter nal

Connectors
0
1

* External storage with HP Rack Storage/12 supports a maximum of 12 Ultra3 SCSI disk
drives.

6 or fewer
6 or fewer

Using External

Connectors*

12 or fewer
12 or fewer

HP NetRAID-2M External S C S I Cables

External Device Length of

External SCSI Cable

Cable

HP Rack Storage/12 5 m eters D6982A
HP Rack Storage/12 10 meters D6983A

If th e necessar y cabl es were not sup plied wit h your system, s ee HP’s Order
Assistant for ordering information. Order Assistant is available on the Internet

http://netserver.hp.com/netserver/.

at:

3

Chapter 1 Introduction

Adapter Har dware and B attery -backed Cache

IOP: The I/O processor (IOP) directs all functions of the adapter, including
command p rocessing, PCI a nd SCSI bus tra nsfers, RAID processing , drive
rebuilding, cache management, and error recovery.

• The IOP for the HP NetRAID-1M adapter is the Intel i960RM

I/O RISC processor runni ng at 100 MHz.

• The IOP for the HP NetRAID-2M adapter is the Intel i960RN

I/O RISC processor runni ng at 100 MHz.

The HP NetRAID-1M adapter has a 32-bit, 33 MHz PCI Bus Interface. The
HP NetRAID-2M adapter has a 64-bit, 66 MHz PCI Bus Interface.

Cache: All HP NetRAID-1M and 2M adapters have cache memory.

• For the HP NetRAID-1M adapter, cache memory resides in a 32-MB

SDRAM DIMM with ECC.

• For the HP NetRAID-2M adapter, cache memory resides in a 64-MB or

128-MB SDRAM DIMM with ECC, depending on the model purchased.

The HP NetRAID-1M or 2M adapters support Direct and Cached I/O an d Wr it e
Through or Writ e Ba ck caching, wh ich can be selected for ea ch logica l drive. To
improve performance in sequential disk accesses, the HP NetRAID-1M and 2M
adapters use Adaptive Read Ahead caching by default, but it can be disabled to
Normal or set to simple Read Ahead caching.

®

Intelligent

®

Intelligent

Battery: Battery backup of the cache is standar d for the HP NetRAID-2M
adapter. It is not available with the HP NetRAID-1M.

Alarm: A tone generator on the HP NetRAID-1M and 2M adapters provides
audible warnings (alarms) when RAID system errors occur.

4

Chapter 1 Introduction

SCSI Termin ation an d Firm ware

Termination: Active termination on the SCSI bus conforms to Alternative 2 of
the SCSI-2 specifications. Termination enable/disable is automatic through cable
detection.

Firmware: The HP NetRAID-1M and 2M firmware handles all RAID and SCSI
command processing and also supports the following functions:

• Disconnect/Reconnect feature optimizes SCSI Bus seek.

• Tagged Command Queuing allows multiple commands to be sent to the

controller, thus improving random access.

• Scatter/Gather supports multiple address/count pairs.

• Multi-threading supports up to 255 simultaneous commands with elevator

sorting and concatenat i on of requests per SCSI channel.

• Stripe size for each logical drive can be set from 2 KB to 128 KB.

• Multiple rebuilds and consistency checks have user-definable priority.

New Features of HP NetRA ID-1M and 2M Adapter s

New features of HP NetRAID-1M and 2M adapters in clude:

• Ultra3 SCSI support, with transfer rat es up to 160 MB/sec for each

channel

• Greater number of disks per logical drive. All the physical disks attached

to an adapter can now be combined into one logical drive—up to 12 disks
for the HP NetRAID-1M and up to 24 disks for the two-channel NetRAID
2M. Older HP NetRAID adapters supported up to eight physical disks per
logical drive.

• RAID configurations contain i ng up to 40 logical devices are now allowed

with both t he HP NetRAID-1M and 2M. Old er HP NetRAID adapters
supported up to eight logical drives.

• Enhanced Array Spanning

• Support for Clustering (HP NetRAID-2M only)

5

Chapter 1 Introduction

Enhanced A r ray Spanning

The HP NetRAID-1M and 2M adapters allow up to eight arrays to be spanned
together as one logical drive, although all the disks in the logical drive must be
conn ected to th e s ame adap ter. T he maximum number of di s k s connected to one
adapter depends on the number of channels (one or two) and whether you are
using the internal or external SCSI connectors.

Maximum Numb er of Disk Drives Conn ect ed to the

HP NetRAID-1M or 2M Adapt er

Model Using Internal

Connectors
1M
2M

* External storage with HP Rack Storage/12 supports a maximum of 12 Ultra3 SCSI disk
drives.

6 or fewer

12 or fewer

Using External

Connectors*

12 or fewer
24 or fewer

Support for C luste ring

The HP NetRAID-2M adapter can be used as a shared storage controller in
HP Netserver cluster configurations. HP Netserver clusters provide reliable,
increased-availability solutions for applications where unplanned downtime is
unacceptable.

Either the HP NetRAID-1M or the HP NetRAID-2M adapter can be used as a
local storage controller.

For complete information on clustering, visit the HP Netserver Clustering
Solutions web site at:

http://netserver.hp.com/netserver//

Physical D isk Roaming an d Data M igration

HP NetRAID-1M and 2M adapters allow physical disk roaming, in which the
adapter keeps track of disk modules if they are moved to different slots in the
hot-swap cages, as long as the slots are all controlled by the same adapter.

With the exception of the NetRAID-4M, all disk modules on older adapters can
be moved to HP NetRAID-1M and 2M adapters, without losing data readability.

6

Chapter 1 Introduction

Once disk modul es are configured for HP NetRAID-1M or 2 M adapters, they can
be moved to different HP NetRAID-1M or 2M adapters, but not to earlier
generation adapters. See Chapter 8, "Upgrading to an HP NetRAID-1M or HP
NetRAID-2M Adapter," for details.

Fault-Tolerance and M anagem ent Featur es

Fault-Tolerance features include the following:

• Automatic failed-drive detection with Autorebuild (automatic rebuild with

a hot s p are or when a drive is r eplaced)

• Manual hot-swap replacement

• Battery-backed cache memory (HP NetRAID-2M only)

Management features include the following:

• Monitoring of adapter configuration, data parity consistency, and SNMP

error messages

• Rapid online configuration change and capacity expansion without the

need to first back up all data, reconfigure the array, and reload the data

Changing C apacity an d RAI D Lev els

HP NetRAID-1M and 2M adapters can expand capacity and change RAID levels
of logical drives without powering down the server.

• Online Ca pa c i t y Expansi on: You can add a physical drive to a RAID 0

or 5 logical drive. This can be an online operation if you are running
Microsoft Windows 2000, Windows NT, or Novell NetWare versions 4.2
and 5.x. Otherwise, capacity expansion is an offline operation only.
(Preparations for capacity expansion must be made, as described in
Chapter 7, "Preparing for Online Capacity Expansion.")

• Online Cha nges to RAID Levels: You can convert a RAID 1 or 5 logical

drive to RAID 0.

NOTE You cannot perform online conversions of logical drives that

span arrays (RAID level 10 or 50).

7

Chapter 1 Introduction

A bout T his Guide

This HP NetRAID-1M and 2M Installation and Conf i guration Guide will help
you install your HP NetRAID-1M or HP NetRAID-2M adapter and plan the
configuration. It guides you through power-up, launching the HP Netserver
Navigator software, making the initial configuration of the adapter, and
installing a NOS-specific configuration utility. It contains a glossary, and its
appendices contain sample cabling diagrams and worksheets to use in planning
the configuration of physical and logical drives.

!

Fill in the worksheets in Appendix C, "Worksheets," as you read this guide and
make your configur ation decisions . The work s heets contain the informat ion you
need to enter into the HP NetRAID Assistant configuration utility launched by
HP Navigator. The pencil icon in the margin is a reminder to log your
configu rati on choices on the work sheets.

The HP NetRAID-1M and 2M Installation and Confi gurati on Guide is intended
to be used in conjunction with your HP Netserver documentation. Refer to your
system docume nta tion for det ails s uch a s c able product numbers and I/O sl ot boot
order.

If you are setting up your HP Netserver for the first time, begin with the
Installation Sheet, if one was supplied with your system. Otherwise, begin with
your Installation Guide or User Guide. Return to this guide when the
documentation instructs you to install additional accessory boards a nd to
configure the mass storage subsystem.

Other Information Sources

Disk array administration and management are beyond the scope of this
document. Refer to the HP NetRAI D S e ri es User Guide in Information Assistant
on the HP Netserver Online Documentation CD-ROM. Access it, and other
material in Information Assistant, from any Microsoft Windows-based PC.

You should also consult the following HP Netserver documentation:

• Readme file for your HP Netserver on the HP Netserver Navigator

CD-ROM

• Your HP Netserver Installation Sheet, if supplied with your HP Netserver

• Your HP Netserver Installation Guide or HP Netserver User Guide

8

Chapter 1 Introduction

• Technical Reference Cards or l abels on the HP Netserver system chassis

(for cables and SCSI ID switch settings)

• Internet site: http://netserver.hp.com/netserver/

Tools You May Need

Please refer to your HP Netserver documentation for the tools needed to open the
chassis. Usually a flat 1/4-inch screwdriver and a T15 Torx driver are required. If
you need to set SCSI ID switches, a flashlight and a small metal pin, such as a
straightened paper clip, will be helpful. An antistatic kit (3M 8501/8502/8505 or
equivalent) is strongly recommended.

CAUTION All HP NetRAID adapter cards are sensitive to static

electricity and can easily be damaged by improper handling.
Using a grounding strap is recommended. Read the following
information carefully before you handle the accessory:

• Leave the adapter card in the antistatic bag until you are

ready to install it.

• If possible, use an antistatic wrist strap and grounding

mat.

• Before you remove the a dapt e r board from the bag, t ouch a

grounded, unpainted metal surface on the system to
discharge s tatic el ectricity.

9

2 RAID Overview

This chapter summarizes concepts and terminology used to describe RAID
systems. It describes the different RAID levels available with the HP NetRAID­1M and 2M adapters. For definitions of terms not introduced here, see the
Glossary later in this guide.

RA ID Overview

HP NetRAID-1M and 2M adapters let you link multiple hard disk drives together
and write data across them as if they were one large drive. With the
HP NetRAID-1M and 2M adapters, you can configure your linked drives into a
RAID (Redundant Ar ray of Independent Disks) subsystem.

Physical Dr ives

The term "physical drive" refers to a single hard disk module.

Figure 2-1. Physical Dri ve

Arrays

HP NetRAID-1M and 2M adapters can combine multiple physical drives into one
array (see Appendix A, "Adapt er Specifications" ). It i s recommen ded tha t all
drives in an array have the same capacity. If you use drives with different
capacities in an array, all the drives in the array are treated as though they have
the capacity of the smallest drive.

Figure 2-2. Array of Physical Dri ves

11

Chapter 2 RAID Overview

Arrays can combi ne disk d rives that are all on one channel of an
HP NetRAID-1M or 2M adapter, or they can combine disk drives from both
channels of an HP NetRAID-2M adapter. However, all the disk drives in an array
must be connected to a single NetRAID adapter. Using internal connectors, this
means that the maximum number of disk drives in an array is 6 (HP NetRAID­1M) or 12 (HP NetRAID-2M). Using external connectors, the maximum number
of disk drives in an array is 12 (HP NetRAID-1M) or 24 (HP NetRAID-2M).

Hot Spares

A hot spare is a powered-on, stan d-by disk drive that is ready for use should
another disk drive fail. When a disk fails, the HP NetRAID adapter’s firmware
can automatically rebuild the data from the failed disk onto the hot spare. The
system administrator can then replace the failed disk and designate a new hot
spare disk. Until a rebuild occurs, a hot spare does not contain user data.

There are two types of hot spares:

• A global hot spare is used if a disk in any array on the adapter fails.

• A dedicated hot spare is reserved for use by a single array.

Logical Driv es

The term "logical drive" refers to a virtual drive that is assigned some portion of
the total capacity of an array. For example, if you have an array of disk drives
with a total capacity of 80 GB, you can create a logical drive with a total capacity
of 20-GB within that array.

Logical drives can take three forms:

• A l og ical drive can u se all of the storag e capacit y of one array. I n

Figure 2-3, Logical Drive LD0 uses all storage capacity in Array A0.

• A logical drive can use less than the available storage capacity of one

array. In Figur e 2-3, Logical Drive LD1 occupies only a part of Array A1.

• A logical drive can span a rrays by spreading across up to eight different

arrays. In Figur e 2-3, Logical Drive LD2 spans Arrays A1 and A2.

In Figure 2 - 3 , there are nine physical drives in three arrays, with one global hot
spare.

12

Chapter 2 RAID Overview

LD1

LD2

LD1

LD2

LD1

LD2

HP NetRAID Adapter

Channel 0 Channel 1

Hot

Spare

Global

Hot Spare

Figure 2-3. Sample Configuration wit h Thr ee Ar ra ys and

LD0

LD0

Array A0 Array A1 Array A2

Three Logical Drives

Understanding RAID Levels

During installation, you configure your logical drives by running a disk array
configuration utility. Each of the logical drives you define must have an assigned
RAID level. Each RAID level has different advantages in terms of performance,
redundancy, and capacity. HP NetRAID-1M and 2M adapters support both basic
array and span ned array configurations.

LD2

LD2

LD2

• Basic arrays have logical drives that are contained entirely within the

array. Basic array configurations use RAID levels 0, 1, or 5.

13

Chapter 2 RAID Overview

• Spanned arrays have logical drives that are spread across multiple arrays

(as many as eight). This permits the physical drives in up to eight arrays
to function as one large logical drive. Each spanned array must contain
the same number of disks and all the disks in the logical drive must be
connected to the same NetRAID adapter. Spanned array configurations
use RAID levels 10 and 50.

Array s with No Redundan cy: RA ID Lev el 0

RAID 0: St riping

In RAID 0 configurations, data is distributed among h a rd disks in the arr a y via
an algorithm called striping. Data written to a logical drive is divided into pieces
called blocks. RAID 0 provides no data redundancy. If one hard disk fails, the
data is lost from the entire logical drive and must be retrieved from a backup
copy. If you have five physical drives configured as one RAID 0 logical drive,
data blocks are written as follows:

Disk 1 Disk 2 Disk 3 Disk 4 Disk 5

Stripe 1
Stripe 2

Block 1 Block 2 Block 3 Block 4 Block 5
Block 6 Block 7 Block 8 Block 9 Block 10

The RAID 0 algorithm allows data to be accessed on multiple disks
simultaneously. Read and write performance on a multidisk RAID 0 system is
significantly faster than on a single drive system.

RAID 0 Advantages

• Provides maximum data capacity, because all disk space is used for data.

• Costs a re low, because no disk sp ace is allocated for redund ancy.

• Access time is fast for both reads and writes.

RAID 0 Disadvantages

• RAID 0 provides no redundancy so if a hard drive fails, data must be

restored from backup.

• Hot spares cannot be used with RAID 0 configurations.

RAID 0 Summary

• Choose RAID 0 if redundancy is not required, and you need fast

perfor mance a nd low costs.

14

Chapter 2 RAID Overview

Basic Arr ays with Redun dancy: R AI D Lev els 1 and 5

RAID 1: Mirroring

In RAID 1 configurations, data on one disk is completely duplicated on another
disk. This is called mirroring. RAID 1 must be configured on a two-disk array.
(The array cannot contain more than two disk drives.) With this algorithm, if
either of the two disks fail, data is available from the duplicate disk. Data is
written as follows:

Disk 1 Disk 2

Stripe 1
Stripe 2
Stripe 3

RAID 1 Advantages

Block 1 Block 1
Block 2 Block 2
Block 3 Block 3

• There is no data loss or system interruption due to disk failure, because if

one disk fails, the other is available.

• Read performance is fast, because data is available from either disk.

RAID 1 Disadvantages

• Costs are high, because 50% of all disk space is allocated for data protection.

• Actual data capacity is only 50% of physical capacity.

RAID 1 Summary

• Choose RAID 1 if high availability and performance are important, but cost

is not a major concern.

15

Chapter 2 RAID Overview

RAID 5: St riping with D istr ibuted Pa rity

RAID 5 is the most common configuration because it provides good overall
performance and data protection with a minimum loss of storage capacity.
RAID 5 distributes the parity blocks equally among all disk drives. If you have
five physical drives configured as one RAID 5 logical drive, data blocks are
written as follows:

Disk 1 Disk 2 Disk 3 Disk 4 Disk 5

Stripe 1
Stripe 2
Stripe 3

Block 1 Block 2 Block 3 Block 4
Block 5 Block 6 Block 7
Block 9 Block 10

Parity 9-12

Parity 5-8

Block 11 Block 12

RAID 5 outperforms RAID 1 for read operations. The write performance,
however, may be slower than RAID 1, especially if most writes are small and
random. For e xamp le, to c hange Block 1 in the diag ram above, the
HP NetRAID-1M or 2M adapter must first read Blocks 2, 3, and 4 before it can
calculate Parity Block 1-4. Once it has calculated the new Parity Block 1-4, it
must write Block 1 and Parity Block 1-4.

RAID 5 Advantages

• There is no data loss or system interruption due to disk failure, because if

one disk fails, data can be rebuilt.

• Capacity equivalent to only one disk in the RAID 5 logical drive is reserved

to store redundant data.

• RAID 5 outperforms RAID 1 for read operations.

• RAID 5 gives good performance if you have a high volume of sm all, ra ndom

transfers.

RAID 5 Disadvantages

• Write performance is slower than RAID 0 or RAID 1.

Parity 1-4

Block 8

RAID 5 Summary

• Choose RAID 5 if cost, availability, and performance are equally important.

RAID 5 performs best if you have I/O-intensive, high read/write ratio
applications such as transaction processing.

16

Chapter 2 RAID Overview

Spanned A rr ays: RA I D Leve ls 10 and 50

With HP NetRAID-1M and 2M adapters, array spanning allows the capacity of
up to eight basic arrays to be combined into a single storage space. A spanned
array configuration must have the same number of disk drives in each basic
array. For ex ample, a RAID 5 array containi ng th ree dri ves cannot be com bi ned
with a RAID 5 array containing six drives.

RAID 10: Spanning with M irror ed A r ray s

A RAID 10 configuration combines multiple RAID 1 arrays into a single storage
space. The data is mirrored within each RAID 1 array and striped across all the
RAID 1 arrays that constitute the RAID 10 logical drive. For example, if your
RAID 10 configuration spans two RAID 1 arrays, data blocks are written as
follows:

Spanned Arra y (RAID 10)

Array 1 (RAI D 1) Array 2 (RAI D 1)

Disk 1 Disk 2 Disk 3 Disk 4
Stripe 1
Stripe 2
Stripe 3

RAID 10 Advantages

Block 1Block 1Block 2Block 2
Block 3Block 3Block 4Block 4
Block 5Block 5Block 6Block 6

• There is no data loss or system interruption due to disk failure, because if

one disk fails, its mirror image is available.

• Read performance is fast, because da ta is ava ilable fr om either disk in each

pair.

• RAID 10 lets you create large logical drives:
♦ With the HP NetRAID-1M adapter, the total number of disks in the

RAID 10 logical drive is limited by the number of disks that can be
att ached to a s ingle SC S I channel. For example, if the Rack Stor age/12
enclosure is used, the maximum number of disks in a RAID 10 logical
drive is 12.

♦ With the HP NetRAID-2M adapter, you can span up to eight RAID 1

arrays, resulting in a 16-disk RAID 10 logical drive.

17

Chapter 2 RAID Overview

RAID 10 Disadvantages

• Costs are high, because 50% of all disk space is allocated for redundancy.

• Capacity expansion is an offline operation only.

RAID 10 Summary

• RAID 10 provides the best performance for most applications where

redundancy and lar ge logical dri ve size are requir ed, and cost is not a factor.

RAID 50: Spanning with D istr ibuted P arit y

A RAID 50 configuration combines multiple RAID 5 arrays into a single storage
space. A distributed parity algorithm within each RAID 5 array provides data
redundancy. The data is striped across all the RAID 5 arrays that constitute the
RAID 50 logical drive. For example, if your RAID 50 configuration spans two
RAID 5 arrays, data blocks are written as follows:

Spanned Arra y (RAID 50)

Array 1 (RAI D 5) Array 2 (RAI D 5)

Disk1Disk2Disk3Disk4Disk5Disk6Disk7Disk

8

Stripe

1

Stripe

2

Stripe

3

Block1Block2Block

3

Block7Block

Block

13

Parity

13-15

Parity

8

7-9

Block14Block15Block

Parity

1-3

Block9Block10Block

Block4Block5Block

6

Parity

11

10-12

Block17Block

16

Parity

16-18

Parity

4-6

Block

12

18

RAID 50 Advantages

• There is no data loss or system interruption due to disk failure, because if

one disk fails, data can be rebuilt.

• Capacity equivalent to only one disk in each array of the RAID 50 logical

drive is required to provide redundancy.

• RAID 50 lets you create large logical drives:
♦ With the HP NetRAID-1M adapter, the total number of disks in the

RAID 50 logical drive is limited by the number of disks that can be
attached to its single SCSI channel. For example, if a Rack Storage/12
enclosure is used, the maximum number of disks in a RAID 50 logical
drive is 12.

18

Chapter 2 RAID Overview

♦ With the HP NetRAID-2M adapter, you can span up to eight RAID 5

arrays, although the total number of disks in the RAID 50 logical drive
is limited by the number of disks that can be attached to the two SCSI
channels . For example, i f t wo Rack S torage/ 1 2 enclosures are u s ed , the
maximum number of disks in a RAID 50 logical drive is 24.

RAID 50 gives good performanc e if you ha ve a high volume of sm all, ra ndom
transfers.

RAID 50 Disadvantages

• Capacity expansion is an offline operation only.

• Performance is slower than RAID 0 or RAID 10.

RAID 50 Summary

• Choose RAID 50 if you need a large logical drive size, and cost, availability,

and performance are equally important. RAID 50 performs best for I/O­intensive, high read/write ratio applications such as transaction processing.

Tabl e 2- 1. RAID Level Summary for RAID Levels 0 to 5

RAID Level RAID 0 RAID 1 RAID 5

Also Known As

Fault Tolerance
Redundancy Type
Hot Spare Option
Disks Required
Usable Cap a c ity
Capacity

Reduction
Read Performance

Random Write
Performance

Sequential Wri t e
Performance

Typical Usage

striping mirroring stri ping with

distributed pari ty

no yes yes

none duplicate parity

no yes yes

one or more tw o three or more

greatest least intermediate

none 50% capacity of one disk

fast (depends on
number of disks)

fastest intermediate s low

fastest intermediate slowest

Rapid reads and

writes with no need

for fault tolerance

intermediate fast

Mostly small

random writes with

fault tolerance

random transfers

with fault tolerance

Mostly small,

19

Chapter 2 RAID Overview

Tabl e 2- 2. RAID Level Summary for Spanned Arrays

RAID Level RAID 10 RAID 50

Also Known As

Fault Tolerance
Redundancy Type
Hot Spare Option
Disks Required:
spans 2 arrays
spans 3 arrays
spans 4 arrays
spans 5 arrays
spans 6 arrays
spans 7 arrays
spans 8 arrays

Usable Cap a c ity
Capacity Reduction

Read Performance
Random Write

Performance
Sequential Wri t e

Performance
Typical Usage

striping with

mirrored arrays

yes yes

duplicate parity

yes yes

4

6, 8, 10, 12, 14*, 16*, 18*, 20*, 22*,
6
8

10

12
14*
16*

least intermediate
50% capacity of one disk for each array

intermediate fast
intermediate slow

intermediate slowest

Mostly small

random writes

Mostly small, random transfers with

fault tolerance and enhanced speed

with fault

tolerance and

enhanced speed

striping with

distributed pari ty

24*

9, 12, 15*, 18*, 21*, or 24*

12, 16*, 20*, or 24

*

15* or 20*
18* or 24*

21*
24*

spanned

*HP NetRAID-2M only. The 1M can only support up to 12 disks per adapter while the
2M can support up to 24 disks per adapter, using external disk enclosures.

20

Chapter 2 RAID Overview

Number of

RAID 5

Start

Data Protection

(Redundancy)

Required?

Yes No

RAID 0

Yes No

Number of

2

Disks

RAID 1 RAID 10

Disk Drives

Figure 2-4. Decisi on Tr ee f or Choosi ng a RAID Level

Complete

Duplication

Required?

4 or more

Disks

3 or more

Disks

Disk Drives?

RAID 50

6 or more

Disks

21

3 Installation and Configuration

Overview

To install an d configure your HP NetRAID-1M or 2M adapter, you need to
perform the following steps. Steps A through M are described in Chapters 4
through 7 of this guide.

Step A. Plan Hardware (Chapter 4 and

Worksheet A)

Step B. Plan Arrays and Logical Drives

(Chapter 4 and Worksheets A
and B)

Step C. Prepare the Adapter (Chapter 5) Step I. Use HP Netserver Navigator

Step D. Install the Adapter (Chapter 5) Step J. Install NOS and HP NetRAID

Step E. Install Cables and Set SCSI ID

Switches (Chapter 5)

Step F. Start HP Netserver Navigator to

Launch HP NetRAID Assistant
(Chapter 5)

Step G. Configure Arrays and Logical

Drives (Chapter 5)

If you are replacing an existing HP NetRAID adapter with an HP NetRAID-1M
or NetRAID-2M adapter, follow the instructions in Chapter 8, "Upgrading to an
HP NetRAID-1M or NetRAID-2M Adapt er."

Step H. Save Configuration and

Initialize (Chapter 5)

CD-ROM to Prepare Diskettes
(Chapter 6)

Driver (Chapter 6)

Step K. Ins tall N OS -s p ec ific

Con figu ra tion U tility ( Chapter 6)

Step L. Run HP NetRAID Express Tools

(Chapter 6)

Step M. (Optional) Prepare for Online

Capacity Expansion (Chapter 7)

23

Chapter 3 Installation and Configuration Overview

Once you have installed and configured your new adapter, refer to Chapter 9,
"Managing Servers Over the Network," and the HP NetRAID Serie s Use r Gu i d e
for information on managing your adapter from a remote location.

Chapter 10, "Understanding HP NetRAID Utilities," discusses the three utilities
that are available to manage your HP NetRAID system.

24

4 Planning

Overview

Before attempting to install and configure your disk array subsystem, you should
invest some time in planning the configuration that best suits your computing
environment. The option s you ch oose d ep end on factors such as the host
operating system used and your requirements for data pr otection, performance,
and capacity.

This chapter gui des you through the plan ning process.

• Step A, Plan Your Hardware, is the first step.

• Step B, P lan Arrays and Logical Drives, is the second step.

Worksheets are provided in Appendix C to help you r ecord your choi ces. You
shoul d make on e copy of Works heet A and Worksheet B for each
HP NetRAID-1M or 2M adapter you plan to install.

Step A. Plan Your Hardware

In Step A, Plan Your Hardware, you will begin to fill out Worksheet A. But first,
you must gather information about your HP Netserver and your user
requirements.

Gather In form ation

You need to know the following information about your system and its use to
create the best HP NetRAID configuration:

• Your host operating system and its block size

• Any special needs t hat certain work gr ou p s or users have for security, da ta

protection, or performance that will vary from the requirements of other
groups or users

• Redundancy requirements to protect data

• Performance requirements

• Storage capacity requirements

• Whether you want hot spare capability

25

Chapter 4 Planning

Rebuild Rate = 50 %

012

389

Sample Worksheet A

Figure 4-1 shows a sample Configuration Worksheet A. (See Appendix C for a
complete explanation of this example.)

PCI Slot # 5

Channel 0:

SCSI IDDisk

Capacity

1

9GB

9GB

2

9GB

3

9GB

4

Adapter # 0

CH 0 CH 1

Array # or
Hot Spare

Type

Array 0

Array 0

Array 0

Global
Hot Spare

Channel:

Channel 1:

SCSI IDDisk

Capacity

4GB

4GB

4GB

9GB

9GB

9GB

Array # or
Hot Spare

Type

Array 1

Array 1

Dedicated
Hot Spare
Array 1

Array 2

Array 2

Array 2

26

Figure 4-1. Sample Worksheet A for HP NetRAID-1M or 2M Adapter

Chapter 4 Planning

Multiple Adapters

The HP NetRAID drivers and firmware will support up to six adapters, but your
particular model of HP Netserver may have fewer PCI slots available. Be sure to
check your system’s PCI I/O slot availability and any slot restrictions before
purchasing another adapter.

If you will be configuring more than one adapter, make one photocopy of
Worksheets A and B for each adapter.

Boot Order

The RAID BIOS residing on the HP NetRAID-1M or 2M board will report the
first logical drive of each adap ter to the Netser ver system BIOS. The system
BIOS will then include these logical drives in its boot order selec tion list .

Sharing IRQs

The adapter can share IRQs. To determine the implications of IRQ sharing for
slot selection, refer to your system documentation and the NOS Installation
Guide in the HP Netserver Navigator CD-ROM.

Cable Ma nagem ent

!

!

Cable management is another factor to consider when choosing a slot for the
adapter. Try to avoid having cables block acc e s s to oth e r I/O c ards in t he system.

Log the adapter’s PCI slot on Work sheet A.

Channels

In this section you determine which physical devices will connect to each SCSI
channel of t he adap ter. Recor d the SCSI ID number and p hysical ca p acity of each
disk d rive in the cor rect channel on Worksheet A. No t wo devi ces on a sin gle
channel can have the same SCSI ID. SCSI ID 7 is reserved for the
HP NetRAID-1M or 2M adapter. For some HP Netservers and optional mass
storage enclosu res, another SCSI ID i s reserved for the pr ocess or man aging the
mass s torage ca g e or enclosu re. Ph ysica l drives on different cha nnels can be
assigned to the same array.

HP NetRAID-1M and 2M adapters support all HP hot-swap SCSI devices and
certain non-hot-swap SCSI devices, such as the Wide hard disk drives installed
in the HP Netserver E 60.

27

Chapter 4 Planning

As explained in Cha pt er 1, "Introduction," for each channel, you have either one
intern a l or one extern a l conn ection. HP NetRAID-1M and 2M adapters support
the fol lowing ch annels and connectors:

• The HP NetRAID-1M adapter provides an internal and external connector

for Channel 0.

• The HP NetRAID-2M adapter provides internal and external connectors

for Channels 0 an d 1.

SCSI Transfer Rate

!

On Wor ksheet A, record t he SCSI t ransfer rate for each channel. T he defaul t
SCSI transfer rate is Ultra3, but you can change this rate to Fast, Ultra, or Ultra2.

Step B. Plan A rrays and Logical Drives

There are two ways to set up arrays and logical drives.

• Automatic configuration is explained for those users who do not want to

customize their arrays and logical drives.

• Custom configurations permit you to create exactly the configuration that

best suits your needs.

Autom atic Configu ration

Automatic mode defines the arrays and logical drives for you, and sets their
parameters. It makes configuration easy.

Automatic mode uses the following rules to define arrays:

• It scans the physical drives, starting at SCSI ID 0 on Channel 0, and it

groups the physical drives by capacity, with up to five drives in an array.

• Each array is defined as a single logical drive, and array spanning is not

used.

• For each array, the system looks to see if you have asked to implement

redundancy (checked the Redundancy box). If you ar e n ot using
redundancy, all logical drives are assigned RAID level 0.

• If an array contains two dri ves, and you ch eck ed Redunda ncy, the logical

drive is assigned RAID level 1.

28

Chapter 4 Planning

• If a group contains three to five drives, and you checked Redundancy, the

logical drive is assigned RAID level 5.

• If an array contains only one drive, the logical drive is assigned RAID

level 0. (No redundancy is possible on a logical drive containing just one
physical drive.)

• Automatic configuration does not create hot spares. You must create your

hot spares before you begin automatic configuration.

If Automatic configuration will suit your needs, you can proceed to Chapter 5,
"Installation and Configuration." However, you are encouraged to read the entire
planning section to determine whether a custom configuration would better meet
your need s.

Custom Configuration

To plan a custom configuration, you will do the following:

• Plan your arrays

• Plan hot spares

• Decide the rebuild rate

Plan Your Arrays

!

• Plan logical drives

In this section you specify which physical drives are assigned to which arrays.
For each physical disk drive that is assigned to an array, log its array number in
Worksheet A.

When creating your a rrays, please cons ider the following :

• Group together physical drives that have the same capacity. (If you use

drives with different capacities in an array, all the drives in the array are
treated as though they have the capacity of the smallest drive.)

• Arrays are numbered sequentially beginning with Array 0.

• Each array can con tain one or mor e physical d rives.

• The more disks you group together in an array, the better the

performance.

• All physical drives in an array must be controlled by the same adapter.

29

Chapter 4 Planning

• The physical drives in an array can be all on the same channel, or they

can be on separate channels.

• You might plan to reserve one or more physical drives for use as a hot

spare. See "Plan Hot Spares (Optional)" later in this chapter for more
information.

When you create your a rrays, you should look a head toward th e logical d rives
that you will configure later. (Logical drives are discussed in "Plan Logical
Drives" later in this chapter.) Here are some considerations about logical drives
that might impact how you set up your arrays:

• Consider what RAID levels you will need.

◊ Different RAID levels require different minimum numbers of physical

drives. For example, RAID 1 requires exactly two physical drives,
RAID level 5 requires at least three physical drives, and arrays with
only one physical drive must be assigned RAID 0.

◊ Different RAID levels reserve different amounts of capacity to provide

redundancy.

• A single array can be divided into a maximum of 40 logical drives.

• A single HP NetRAID-1M or 2M adapter can control a maximum of 40

logical drives.

• If you want to use the online capacity expansion feature later, logical

drives cannot span arrays and there must be only one logical drive per
array.

• If you want one logical drive to span two or more arrays:

◊ Spanned arrays mu st be numbered consecut ively.
◊ Spanned arrays must contain the same number of disk drives per

array.

◊ Although each physical drive in an array must have the same capacity,

one logical drive can span two or more arrays of different capacities.
For exa mple, one array migh t contain three dr ives of 1 GB each, and
the s econd array might cont ain three drives of 5 GB each . One logical
dri ve can span both of these arrays.

◊ Spanned arrays must be controlled by the same adapter.

As you plan your arrays, it might help to sketch your configuration. Figures 4-2
and 4-3 are examples.

In Figure 4-2, Logical Drive 1 (labeled "LD1") spans arrays A0 and A1,
occupying space in both. Each array of physical drives is on a separate channel.

30

Chapter 4 Planning

LD1

LD1

Adapter 0

Channel:

01

LD0

LD0

LD1 LD1LD0

Physical
Drives

LD1

Figure 4-2. Two Logical Dri ves Where Each Arr ay Uses a Differ ent Channel

LD1

Array A0

LD1

Array A1

Figure 4-3 shows the same configuration, except that Array A1 contains physical
drives from both Channel 0 and Channel 1.

Adapt er 0

Channel:

01

LD0
LD1

LD0
LD1

LD1

LD1 LD1LD0

Physical
Drives

Array A0

Figure 4-3. Two Logical Dri ves Where Arr ay A1 Contains Dri ves

Array A1

on More than O ne Channel

31

Chapter 4 Planning

Plan Hot Spares (Optional)

!

On Wor ksheet A for each adapter , log any hot spare disk m odules an d indicate
whether each is global or dedicated to a particular ar ray.

A hot spare is a powered-on, stand-by disk that is ready for use should another
disk fail. When a disk fails, the disk array controller’s firmware can automatically
rebuild the data from the failed disk onto the hot spare. Unless a rebuild occurs, a
hot sp are does not conta in user data. When planning hot spares, keep these
considerations in mind:

• Hot spares are useful only for logical drives with RAID levels of 1, 5, 10,

or 50.

• Hot s pares cannot rebuild logical drives of RAID 0, because this RAID

level does n ot provide a mean s of recovering data.

• A dedicated hot s p are is a s s igned t o a s p ecific array. Only one hot spare

can be dedicated to each individual array.

• Global hot spares stand ready to rebuild any physical drive for any array

with redundancy controlled by th e adapter.

• A hot spare does not count toward the usable capacity of any array.

• A hot spare must have capacity equal to or greater than the capacity of the

physical drive it would replace.

• An adapter can support up t o eight hot spares.

Decide the Rebuild Rate

!

During a rebuild, the contents of a complete physical drive is rewritten. Normal
operations can go on during a rebuild, but performance may be degraded. The
Rebuild Rate controls the rate at which a rebuild is done by specifying what
percentage of IOP resources will be dedicated to rebuilding the data on a failed
physical drive.

A high Rebuild Rate (over 50%) speeds up the rebuild, but slows system
performance. A low Rebuild Rate (under 50%) slows the rebuild process, but
speeds up system per forman ce. Th e default is 50%.

RAID 0 data cannot be rebuilt because it has no redundancy.
Log the Rebuild Rate on Worksheet A.

32

Chapter 4 Planning

Plan Logical D rive s

Logical drives are virtual drives configured within an array or across arrays.
Logical drives can take three forms:

• A logical drive can use all of th e storage capacity of one a rray.

• A logical drive can use less than the available storage capacity of one

array. The remaining capacity can be used by additional logical drives.

• A logical drive can span arrays by using capacity in up to eight arrays.

Spanned log ical dr ives can us e all of th e s torage ca p acity of the arrays
they span, or they can use less than all the available capacity.

General Considerations

Consi der the differing need s of work groups or users for security, d ata protection ,
and perform ance as you deci d e how to configure the logical d rives in each a rray.

Here are some considerations about logical drives that might impact how you set
up your arrays:

• You must configure at least one logical drive per array.

• A single array can be divided into a maximum of 40 logical drives.

However, if you want to use the online capacity expansion feature later,
plan to create just one logical drive per array.

• The adapter can support a m a xim um of 40 logical drives.

• Consider what RAID levels you need. Review the information in

Chapter 2 and look at Tables 2-1 and 2-2 th at compare th e RAID levels.

• Look at the arrays you have defined so far. Ensure that the arrays contain

the minimum number of physical drives required for the RAID levels you
want to create.

• Make sure the redundan cy requirements of the RAID levels you want

leave you with enough capacity for your data.

• If you want a logical drive to span two or more arrays, consider the

following:

◊ You cannot use the online capacity expansion feature with logical

drives that span arrays.

◊ Spanned arrays must contain the same number of disk drives per

array.

33

Chapter 4 Planning

◊ Although each drive in an array must have the same capacity, one

logical drive can span two or more arrays with different capacities. For
examp le, one a rray mi g ht cont ain t hree drives of 4 MB each , and the
second a rray might contain three drives of 12 MB each. O ne logica l
dri ve can span both of these arrays.

◊ Spanned arrays mu st be numbered consecut ively.
◊ When you use an HP NetRAID utility to configure your system, and

you specify th at a logical drive will span arrays, the system will span
all eligible arrays that are numbered consecutively an d th at contain
the same number of disk drives, up to a maximum of eight arrays.

◊ Spanned arrays must be controlled by the same adapter.

Sample Worksheet B

A sample Worksheet B is shown in Figure 4-4. The instructions for filling in
each col umn are thes e:

• For the Logical Drive # (column 1), use up to 40 logical drives, startin g

with LD0.

• For the Array # (column 2), start with Array 0 and number consecutively.

• In the Span column (3), you can choose to span this LD over the next 1-7

arrays. Enter your choice.

34

• For the RAID Level (column 4), enter 0, 1, 5, 10, or 50

• The Logical Drive Size (column 5) is optional. You can let the HP

NetRAID Assistant Wizard calculate the size.

• The Stripe Size (column 6) can be 2, 4, 8, 16, 32, 64, or 128 KB.

• The Write Policy (column 7) is either Write Back or Write Thru.

• The Read Policy (column 8) can be Normal, Read Ahead, or Adaptive

Read Ahea d.

• The C ache Poli cy (colu mn 9) ca n be Cach ed I /O or Direct I/O.

Chapter 4 Planning

WORKSHEET B (LOG ICAL DEVICES)

Logical

Drive #

LD0

LD1

LD2

LD3

LD4

LD5

LD6

LD7

LD8

Array#Span RAID

Level

Logical

Drive

Stripe

Size

Size

0 No 5 18 G B 64 KB W.

1 No 1 4 GB 16 KB W.

2 No 5 10 G B 64 KB W.

2 No 5 8 GB 64 KB W.

Write

Policy

Back

Back

Back

Back

Read

Policy

Cache

Policy

Adapt. Cached

Adapt. Cached

Adapt. Cached

Adapt. Cached

LD9

LD10

And so forth, up to LD 39…………………..

Figure 4-4. Sample Worksheet B

35

Chapter 4 Planning

Logical Drives, RAID Levels, and Array Spanning

!

!

!

On Worksheet B, logical drives are numbered LD0 t hrough LD39. F or each
logical drive you plan to create, record the following information:

• Array number to which the logical drive is assigned

• Whether the logical drive spans up to eight sequentially numbered arrays

• RAID level

For each logical drive, you also need to define the logical drive size (capacity),
stripe size, write policy, read policy, an d cache policy as defined in the sections
that follow.

Logical Drive Size

You can calcula te the usable capacity to assig n to each logical d rive, or you can
let the HP NetRAID Assistant Wizard specify it during configuration. If you
calculate logical drive capacity, record it in Worksh eet B.

If you wan t a logical drive to occupy less space than is available on one array,
you must enter the logical drive size.

Stripe Size (Stripe Depth)

Stripe size is the amount of data contiguously written to each disk in an array. It
is sometimes called "stripe depth." You can specify stripe sizes 2 KB , 4 KB,
8 KB, 16 KB, 32 KB, 64 KB, and 128 KB for each logical drive. Consider the
following when setting your stripe size:

• The default stripe size is 64 KB.

• For best performance, choose a stripe size equal to or smaller than the

block size used by your operating system.

• A large stripe size produces better performance if the system does mostly

sequential reads.

• Choose a small stripe siz e i f your system performs m ostly random rea ds.

For each logica l drive, log th e stripe s ize in Worksheet B.

NOTE Consi der the stri p e s ize carefu lly, because on ce configur ed ,

you cann ot change the size.

36

Chapter 4 Planning

Write P o lic y

!

When the IOP writes to disk, the data is first written to the cache on the
assumption that the IOP will read it again soon. The two Write policies are:

• Write-Through: In a write-through cache, data is written to disk at the

same time it is cached. This setting provides better security because
entries are always copied to disk. Unless an Uninterrupt i ble Power Supply
(like a battery backup unit) is connected, you should use the write-thr ough
setting, because otherwise data could be lost from cache memory in the
event of a power failure.

NOTE Write-Through is the recommended write policy for the

HP NetRAID-1M adapter because this adapter does not have a
battery backup unit.

• Write-Back: In a write-back cache, data is written to disk only when it is

forced out of the cache. Writ e- back is efficient, becau se an entry may be
written many times in the cache without a disk access. Write-Back can be
used if an Uninterrupti ble Power Supply maintai ns the data in cache
memory in case of a power failure.

NOTE Write-Back is NOT recommended unless one of the following

is true:

The adapter is HP NetRAID-2M with a battery backup

•

unit.

• The system has an uninterruptible power supply (UPS).

Write-Back is not certified for any logical drive used as a
Novell NetWare vol ume.

For each logica l drive, record the wri te policy in Worksheet B.

37

Chapter 4 Planning

Read Policy

!

The three Read policies for HP NetRAID are:

• Read-Ahead: This is a memory caching feature that tells the adapter to

read sequentially ahead of requested data and cache the additional data in
memory, anticipating that the additional data will be requested.
Read-Ahead supplies sequential data faster, but it is not as efficient when
accessing random data.

• Normal: This policy does not use the read-ahead memory-caching feature.

This policy is efficient when most of the data reads are random.

• Adaptive: Adaptive policy causes the read-ahead feature to be used if the

last two disk a ccesses were in sequ ential sectors.

For each logica l drive, record the read policy in Worksh eet B.

Cache Policy

!

HP NetRAID lets you choose one of two cache policies:

• Cached I/O: Reads a re always cached regardles s of random ness. The

selected Rea d policy (Read-Ahead, Normal, or Adaptive) and Wri te policy
(Write-Through a nd Write-Back) always applies.

• Direct I/O: First reads to a new location always come directly from the

disk. If a location is read repeatedly, then the Read policy as selected will
apply and the read data will be cached. Read data is cached only if
accessed repeatedly. With 100% randomness, noth ing is cached.

For each logica l drive, record the cache policy in Worksheet B.

38

5 Installation and Configuration

Overview

This chapter covers Steps C, D, E, F, G, and H of the installation procedure. You
should already have completed Step A, "Plan Your Hardware," and Step B, "Plan
Arrays and Logical Drives" in Chapter 4, "Planning."

Step C. Prepare the Adapter

In this step, you install the adapter into the HP Netserver. Step C covers:

• Plugging in t he Battery Backup Unit on the HP NetRAID-2M adapter

CAUTION The adapter is sensitive to static electricity and can easily be

damaged by improper handling. Using a grounding strap is
recommended. Read the followin g in formation carefully
before you handle the accessory:

• Leave the adapter in the antistatic bag until you are ready

to install it.

• If possible, use an antistatic wrist strap and grounding

mat.

• Before you remove the adapter from the bag, touch a

grounded, unpainted metal surface on the system to
discharge s tatic el ectricity.

39

Chapter 5 Installation and Configuration

Plug-In Battery Backu p Unit

NOTE The HP NetRAID-1M adapter does not have a Battery Backup

Unit.

CAUTIONS 1. Follow the directions below to plug in the Battery Backup

Unit before you install the HP NetRAID-2M adapter in your
Netserver.

2. When the Battery Backup Unit is connected:

• Do not place the HP NetRAID-2M adapter on a

conductive surfa ce.

• When installing the adapter, do not allow the adapter or

its Battery Backup Unit to touch any part of the
HP Netserver. Doing so could short the battery, and it may
damage other components. You may place the adapter on
an antistatic mat.

40

Chapter 5 Installation and Configuration

To connect th e ba ttery pack, plug the connector on the wire into the conn ector at
J2 on the battery backup board, as shown in Figure 5-1. Th e connector is keyed to
make sure the proper connection is made.

Wire

J2

Figure 5-1. Pl uggi ng i n Bat t e r y Backup Unit on the HP NetRAID- 2M

CAUTIONS 1. The battery pack must be connected when the adapter card

is not plugged in to the Netserver.

2. The adapter is sensitive to static electricity an d can easily
be damaged by improper handli ng. The use of a grounding
strap is recommended.

41

Chapter 5 Installation and Configuration

Step D. Install the A dapter

In this step, you will:

• Turn off the HP Netserve r and remove the neces s ary covers or ope n the

panels

• Install the adapter

Turn Off the HP Netserv er and Open I t

CAUTION HP NetRAID-1M and 2M Accessory boards are not hot

pluggable. Unplug HP Netserver power cord(s) before
installing a HP NetRAID-1M or 2M board.

NOTE Before you begin, you may need to look up information about

your HP Netserver in Information Assistant on the
HP Netserver Online Documentation CD-ROM. You will need
to know how to open or rem ove the HP N etserve r panels and
covers, as well as any special instructions for installing a
board in a PCI s lot of the HP Net s e rver.

Turn off the HP Netserver and open it, as follows:

1. Bring down the operating system properly, as described in your
NOS documentation.

2. Turn off the HP Netserver power and disconnect th e power cord(s) and all
telephone cords.

42

Chapter 5 Installation and Configuration

CAUTION Before r emoving t he cover, a lways disconn ect the power

cord(s) and unplug telephone cables. Disconnect the power
cord to avoid exposure to high energy levels that may cause
burns when parts are short-circuited by metal objects, such as
tools or jewel ry. Disconnect te lephone cables to a void
exposure to shock hazard from telephone ringing voltages.

Note that the power switch does not turn off standby power in
some HP Netservers. Disconnect the power cord(s) to turn off
standby power.

3. Op en or remove the HP Netser ver panels or cover s over the PCI slots .

4. To remove an existing adapter, disconnect its SCSI cables first. Follow

the procedures in Chapter 8, "Upgradi ng to an HP NetRAID-1M or
HP NetRAID-2M Adapter," to remove the adapter and to disconnect the
battery if it is an HP NetRAID-2M.

Install the A dapter

CAUTION Do not allow the adapter to contact any part of the

HP Netserver other than the PCI slot during installation.
Do not allow the Battery Backup Unit on HP NetRAID-2M
adapters to contact any part of the HP Netserver during
installation. Any such contact could cause a short in the
battery pack and may dam age other electr ical components.

To install the adapter:

1. Refer to Worksheet A that you filled out while reading Chapter 4,
"Planning," for the slot selected for the adapter. If the adapter is already
installed, verify that it is in the correct slot.

2. I f there is a s lot cover on the PCI slot, remove it.

43

Chapter 5 Installation and Configuration

3. Install the adapter by following the installation instructions for installing

PCI boards in your h ost system manual and on the chassis labels. Al i g n
the adapter card bus connector into the slot. Ensure that it does not
physically interfere with adjacent cards. Press the card gently but firmly
into the slot to seat it properly. The bottom edge of the card should be
flush with the slot. Secure the adapter to the system chassis with a
mounting screw.

CAUTION The adapter is sensitive to static electricity and can easily be

damaged by improper handling. The use of a grounding stra p
is recommended.

Before you remove the adapter from the bag, touch a
grounded, unpainted metal surface on the system to discharge
stat ic electr icity.

Step E. Install Cables

In t his step, you connect the adapter’s SCSI channels to the physical drives listed
in Worksheet A .

Connect Cables

Install t he cables t o create the hardware setup you planned in Worksheet A. Refer
to the system documentation and the Hot Swap Disk Subsystem Cabling
Information label on the chassis for factory default cable configurations.

NOTE For additional information, refer to the HP Rack Storage/12

Installation Guide.

Install and remove SCSI cables as follows:

• SCSI cable connectors must be plugged in or removed evenly, not one end

first, to avoid bending the pins. Use the white pull-tab, if present, when
removi ng a connector.

• For back p lane con nectors wi th locki ng ear s , open the lockin g ears before

inserting the SCSI cable.

44

Chapter 5 Installation and Configuration

CAUTION For the HP NetRAID-2M, the internal connectors for

Channel s 0 and 1 are very close tog et her. I f t here are locking
ears on the SC S I cables, you must remove them before
inserting the cables, as shown in Figure 5-2.

Figure 5-2. Removing the Locking Ears From the SCSI Cable

Some nonstandard cable configurations and switch settings are listed in the
HP Netserver documentation. Refer to th e m a ss storage section of your system
documentation for details on HP Netserver configurations.

Avoid proble ms with your SCSI devices and ad apter by observing the following
rules:

• Avoid mixing Fast/Wide, Ultra SCSI, Ultra2 SCSI, or Ultra3 SCSI disk

drives on the same channel. In particular, if a Fast/Wide disk drive is on
the same channel with an Ultra SCSI, Ultra2 SCSI, or Ultra3 SCSI disk
drive, the performance of all the drives will be degraded to that of the
Fast/Wide.

• The HP NetRAID-1M and 2M adapter ar e for disk drives only. Do not

attempt to connect a CD-ROM drive or a tape drive to these adapters.

45

Chapter 5 Installation and Configuration

CAUTION Handle disk modules carefully. They are more susceptible to

shock, vibrat ion, and electrostatic disch arge when they are
not in the cabinet. When removing a module while the system
is powered on, disengage the module and wait for it to stop
spinning before removing it from its hot-swap slot.

Also, d o not touch the SCSI edge connector pins. The oils on
your skin could impair the el ectrical connect ion.

Replace Cover

If you removed the power supplies or fans, replace them according to the
instructions in your HP Netserver documentation.

Close or replace the panels or cover s on the computer a nd reconnect t he
HP Netserver to power and n etworks.

Step F. Start HP Netserver Navigator to Launch

HP NetRAID Assistant

Boot HP Netserver Navigator CD-ROM

To launch the HP NetRAID Assistant, you must start from the HP Netserver
Navigator CD-ROM. Ensure that all the SCSI devices power up before or at the

same time as the host computer.

NOTE HP NetRAID-1M and 2M adapters do not support bootable

CD-ROM drives or tape drives.

Boot Messages

If you recei ve an error m es s age during the boot p rocess, refer to C hapt e r 14,
"Troubleshooting," or to the online help in Information Assistant for more
information. Som e power-u p (boot) messages are routine .

Select Disk Array Controller Con figuration

If HP Navigator asks you to set the date, time, and so on, do so. The
HP Netserver Navigator Main Menu then appears.

1. When the HP Netserver Navigator Main Menu is displayed, choose

Configure the Server.

2. Choose Custom Setup from the next group of choices.

46

Chapter 5 Installation and Configuration

3. Choose Disk Array Controller Configuration from the Netserver

Utilities screen. This launches the HP NetRAID Assistant utility.

Step G. Configure Arrays and Logical Drives

In this step, for each adapter that need to be configured, you will use Worksheets
A and B to:

• Configure the arr ays of physical drives

• Configure the logical drives

47

Adapter Selector

Chapter 5 Installation and Configuration

HP NetRA ID A ssistant

Configuration
Adapter Logical Drive
Physical Drive

Toggle to Select Vie w.

Figure 5-3. HP NetRAID Assistant Window

The HP NetRAID Assistant, shown in Figur e 5-3, is an object-oriented graphical
user interface (GUI) with conventions similar to those in Microsoft Windows.
Click on an object with the left mouse button to select or deselect it.

NOTE Since the HP NetRAID-1M is a single-channel adapter, the

HP NetRAID Assistant window for this adapter contains only
Channel 0 information. The Channel 1 column does not exist.

48

Chapter 5 Installation and Configuration

Steps H and I only describe the featur es of t he HP NetRAID Assistan t needed t o
configure the adapter initially. Refer to the HP NetRAI D Series User Guide in
Information Assistant for more information about HP NetRAID Assistant.

The HP NetRAID Assistant window contains the following features from top to
bottom:

• Menu bar: The menu bar activates pull-down menus for Configuration,

Adapter, Physical Drives, Logical Drives, Progress, and Help.

• Toolbar: The toolbar icons are separated into four categories of functions:

Configuration, Properties, Miscellaneous, and Other. They provide
shortcuts to access the menu options.

Display
Print Adapter Rebuild Rate
Wizard Physical Drive Rescan Exit
Clear Logical Drive Help

CONFIGURATION PROPERTIES MISCELLANEOUS

Figure 5-4. HP NetRAID Assistant Main Menu Toolbar Options

• Adapter box: The Adapter box shows the number of the current adapter

that is being configured. If the HP Netserver contains more than one
adapter, you can change the current adapter by using the Adapter box
pull-down list.

49

Chapter 5 Installation and Configuration

• Physical Devices box: The Physical D evi ces box contains either one

channel box (for an HP NetRA ID-1M adapter) , or t wo channel boxes (for
an HP NetRAID-2M) adapter, which show the physical drives on the
SCSI channels of the current adapter. The number in parentheses to the
right of each physical drive icon is its SCSI ID (Target) on the channel.

The s tate of each p hysical drive app ears to the rig ht of th e SC S I ID or
array designation. The possible states of a physical drive are as follows:

◊ Onln: The physical drive is online, functioning normally, and part of

a confi g u red logi cal drive.

◊ Ready: The physical drive is functioning normally, but is not part of a

configu red logi cal drive, nor configur ed as a hot s p are.

◊ HotSp: The physical drive is configured as a hot spare, and is

powered up and r eady for use as a spare in case an online drive fails.

◊ Failed: The physical drive failed and is out of service.
◊ Rebuilding: The physical drive is involved in a rebuild process to

recover data that was on a failed drive.

◊ Not Responding: The physical drive is not present, not powered-on,

or has failed.

• Logical Devices box: The Logica l Devices box shows t he current a d apter

and its global hot spare pool. When arrays, logical drives, and hot spares
have been defined, they are displayed here. Clicking on Logical View or
Physical View switches between showing logical drives and physical
drives. Clicking on the + sign in the yellow diamond expands the view if
it is collapsed (physical or logical drives or hot spares are hidden).

• Status line: The status line at the bottom of the window shows the

progress of the scan required to build the displays on the HP NetRAID
Assistant window. It also suggests possible actions.

Select Adapter to C onfigur e

Look in the Adapter box to see if the adapter you wish to configure is displayed.
If not, select it from the pull-down list.

Clear Configur ation

You should clear the configuration of the adapter to prepare it for the new
configuration.

50

Chapter 5 Installation and Configuration

To clear the existing configuration:

1. Select the Configuration menu.

2. Choose Clear Configuration.

3. Click OK.

Check Rebuild Ra te

During a rebuild, the content of a complete physical drive is rewritten. Normal
operations can go on during a rebuild, but performance may be degraded. The
Rebuild Rate controls the rate at which a rebuild is performed. A high Rebuild
Rate (over 50%) speeds up the rebuild, but slows system performance. A low
Rebuild Rate (und er 50%) slows the rebuild process, but speeds up system
performance. The default setting for the Rebuild Rate is 50%.

To check the Rebuild Rate from the HP NetRAID Assistant window:

1. Choose Rebuild Rate from the Adapter menu.

2. Reset the rate by dragging the slider with the mouse.

3. Click OK.

NOTE Clearing the confi g u rati on does not affect the rebuild rate.

Assign Global Hot S pares

NOTE Refer to Wor k s heet A when assigning hot spares.

To assign any physical drives to the global hot spare pool for the adapter:

1. Click on a Ready physical drive in the Physical Devices box. This drive
must have capacity th at is at least as great as any drive it will replace.

You can select more than one Ready drive if you want to create more than
one global hot spare. Clicking on a Ready drive either selects it or
deselects it.

2. Drag the selected drives into the global hot spare pool.

NOTE To check the capacity of a physical drive, double-click on it to

display its properties.

51

Chapter 5 Installation and Configuration

Select Wizard

NOTE If any physical drives have been moved, added, removed,

changed, or changed in state since HP NetRAID A s sistan t was
started, rescan the drives by choosing the Adapter menu and
then selecting the Rescan option.

To launch the HP NetRAID Assistant Wizard:

1. Select the Configuration menu.

2. Choose the Wizard. The Wizard starting window is displayed, as shown

in Figure 5-5, with a choice of Custom and Automatic configuration
modes.

52

Figure 5-5. HP NetRAID Assist ant Wizard Star t i ng Window

Chapter 5 Installation and Configuration

3. Click one of the following configuration modes:

◊ Select Custom if you want to define the arrays and logical drives and

set their parameters.

◊ Select Automatic if you want the HP NetRAID Assistant Wizard to

define the arrays and logical drives (and set their parameters) for you
automatically.

When you select Automatic mode, you can toggle the Redundancy
chec k box at the bot tom of the win dow. If t he Redu ndancy box
contains an "X," the arrays are automatically configured with
redundant logical drives if possible. They will be assigned RAID levels
of 1 or 5, depending on the number and capacities of the physical
drives. If the Redundancy box is empty, all logical drives are
configured as RAID 0, which is not r edun da nt. See "Automatic
Configuration" in Chapter 4, "Planning," for a complete list of the
rules used in Automatic configuration.

4. Click the Next button.

5. If you chose Automatic mode, skip to "Preview Configuration" later in
this chapter.

Define Phy sical A rray s and D edicated Hot Spares

NOTE Refer to Wor k s heet A when defini ng arrays.

The HP NetRAID Assistant Wizard Array Definition window appears, displaying
the Physical Devices and Logical Devices configured on your system. It will be
similar to the display shown in Figure 5-6 depending on your configuration. The
"new array" in the Log ical Devices box shows where a new array can be defined.

53

Chapter 5 Installation and Configuration

Figure 5-6. HP NetRAID Assistant Wizard Array Definition Window

To assign physical drives to the first array:

1. Select all the Ready physical drives that you want to put into the first
array. Clicking on a drive either selects or deselects it.

2. Click the Add to Array button.
Physical drives show "A:new" to indicate the drive has been added to a

new array, but has n ot been accepted yet.

3. If you want to remove a physical drive from a new array, select the drive
in the new array and click the Reclaim button.

4. When the array is complete, click the Accept Array button.
All physical drives assigned to arrays display th eir ar r ay numbers to the

rig ht of th e S C SI ID. The numbering is zero-ba s ed . For example, A0
designates a physical drive assigned to Array 0.

5. The next new arra y appears. Assign ph ysical drives to it as described
above. Be s ure t o c lick the Accept Array button to close the array.

54

Chapter 5 Installation and Configuration

To assign physica l drives to an existing (not new) a r ray:

1. Click one or more Ready physical drives to select (or deselect) them.

2. Drag the drives into the existing array. All selected Ready drives will be
added to the array.

Drives cannot be removed selectively from an existing array, but the entire array
can be undone. An array cannot be reclaimed if it has any logical drives defined.

To remove an entire array:

1. Select the array. ( M ake sure that nothi ng else i s s elected.)

2. Click the Reclaim button.

3. Click OK.

Hot Spares

Hot spares can be assigned to the global hot spare pool for the adapter, or they
can be d ed icated t o a s p ecific array. Only one hot spare can be d ed icated t o a
given array.

To assign a dedicated hot spare:

1. Select a Ready physical drive. Be sure nothing else is selected.

2. Click the Add Spare button. The Hot Sp are Target window appears.

3. Click the Dedicated to button, and then click on the down arrow to
display a list of valid arrays.

4. Click the array to which you want to dedicate the hot spare.

5. Click OK.

6. Continue defining ar rays and hot spares.

To reclaim (undo) one or more hot spares:

1. Select one or more hot sp ares.

2. Click the Reclaim button to convert the hot spares to Ready physical
drives.

When you are fini shed defining ar r a y s and hot spa r e s:
Click the Next button.

55

Chapter 5 Installation and Configuration

Define Logical Dr iv es

NOTE Refer t o Worksheet B wh en defin ing logical drives.

After you finish defining ar rays and hot spares, and click Next, the HP NetRAID
Assistant Wizard Logical Drive Definition window appears. A sample window is
shown in Figure 5-7. Th e window is ready for you to define Logical Drive 0.

Figure 5-7. HP NetRAID Assistant Wizard Logical Drive Definiti on Window

◊ The Logical Drive Parameters box shows the number of the logical drive

being defined and has boxes to set its RAID level and size.

◊ The Span Arrays check box turns array spanning on or off.
◊ The Advanced button leads to more parameters, which are preset but can

be changed.

56

Chapter 5 Installation and Configuration

◊ The Logical Devices box depict s the arrays on t he current a d apter, the

logical drives on each array, and the global hot spare pool for the adapter.
Logical drives are labeled as new and as LD0 through LD7. Click on th e
+ sign in the yellow diamond if the view is collapsed (logical drives are
hidden).

The HP NetRAID Assistant Wizard is ready for you to set the parameters of the
new logical drive.

To define a l ogi c a l drive that does not span arrays:

1. Make sure that the Span Arrays box does not have an "X" in it; if it does,
click on it to remove the "X."

2. Set the RAID level by clicking the arrow and selecting the RAID level
from the pull-down menu.

3. Set the logi cal drive size by eith er accepti ng the default in the box or by
clicking in the Size box and typing a smaller size. Setting a smaller size
leaves space for another logical drive on the same array.

4. Set the stripe size, read policy, write policy, or cache policy, by clicking
the Advanced button to display the Advanced Parameter window. Click
the arrows t o view t he choices, and select th e ones you want. Disrega rd
the V irtual Sizi ng check box, because you can chang e this p arameter onl y
in the HP NetRAID Express Tools utility. Click OK to return to the
Logical Drive Definition window.

5. When the logical drive parameters are set, click the Accept button.
The next logical drive to be defined is displayed. If there is still space in

the current array, the new logical drive is on it.

6. Define any other logical drives on the current array that will not span to
the next array. HP Net RAID Assistant Wi zard k eep s creating logi cal
drives on the same array until its capacity is used fully, or until there are
eight logical drives on the adapter.

57

Chapter 5 Installation and Configuration

To create a logical drive that spans two or more arrays:

NOTE The arrays to be spanned must have sequential array numbers

and each array mu st contain the same n u mber of physica l
drives.

HP NetRAID Assistant will attempt to span up to eight arrays.
Array spanning will stop when:

• It h as creat ed a logical dri ve of the size you speci fy in

Step 2 below.

• The next sequentially numbered array has a different

number of drives. (Spanned arrays must contain the same
num ber of drives i n each array.)

1. Click the Span Arrays box to mark it with an "X." An array labeled with

a hyphenat ed number , such a s A 0 - 1 or A0-3, appea rs in the Logica l
Device s box.

2. If you know the exact size of the logical drive you want, enter it in the
Size (MB) box .

If you do not specify the size of the logical drive, the default size reflects
the maximum number of arrays that can be spanned.

3. De fine t he log ical drive as described above.

To remove the last logical drive that was added:

1. Click the Undo button.

2. You can continue undoing logical drives by clicking Undo.

When you are done defining logical dr i ve s:

When all the logical drives are defined for the adapter and you have clicked the
Accept but ton for the last one, click the Next button.

The Next button does not operate until one of the following conditions has been
satisfied:

◊ All capacity has been assigned to logical drives.
◊ Eight logical drives have been defined.

58

Chapter 5 Installation and Configuration

Preview Configur ation

NOTE Refer to Wor k s heets A and B when checkin g the

configuration.

The HP NetRAID Assistant Wizard Configuration Preview window, shown in
Figure 5-8, displays the configuration proposed for the physical and logical
drives.

Figure 5-8. HP NetRAID Assist ant Wizard Confi gur at i on Pr eview Window

NOTE The RAID level of a logical drive that spans arrays lacks the

terminal zero. Mentally add it to make RAID 1 into RAID 10
and RAID 5 into RAID 50.

59

Chapter 5 Installation and Configuration

To switch between showing logical drives and physical drives:
Click Logical View or Physical View.
To expand a view that has been collapsed (physical or logical drives, or hot

spares ar e hi dden):
Click the + sign in the yellow diamond.
To display the properties of a logical drive:

Double-click the logical drive in the Logical Devices box.

To display the pr oper t i es of a physical drive:

Double-click the physical drive in the Physical Devices box.

To change a logical drive:

1. Click the Back button to back up to the previous screen.

2. Delete the last logi cal dri ve d efi ned (accep ted) by clicking th e Undo
button. Keep clicking Undo until you have removed the logical drive you
want to change.

3. Configure the logical drives again or click Back to back up and change
array definitions.

To correct the assignment of physical drives:

1. Undo any logical drives that are defined on the array by clicking Back,
then clicking Undo as necessary to delete the last logical drive.

2. Click the Back button to go to the Array Definition screen.

3. Select the array to be reclaimed, and click the Reclaim button.

4. Configure the physical drives and logical drives again.

To start the configuration over again:
Click the Cancel button.
To accept the final configuration:
Click the Finish button on the Configuration Preview screen.
To save your configuration and initialize logical drives:

1. Click OK at the message asking if you want to save the configuration.

60

Chapter 5 Installation and Configuration

A Writing Configuration message appears briefly, indicating that the
configuration information is being written to the adapter’s NVRAM. This
is not a binary file that can be loaded to restore the configuration.

HP NetRAID Assistant asks if you want to initialize your logical drives
now. Logical drives must be initialized before they can be used. If you
have other adapters to configure, you may wish to do that first and then
initialize all the logical drives.

2. Click the Cancel button to defer initialization of the logical drives until
later, or click OK to initialize logical drives now.

Step H. Save Configuration and Initialize

In this step, you will do the following:

• Save the configuration to a binary file.

• Print a copy of the configuration.

• If you have more than one adapter, configure any other adapters.

• Initialize the logical drives if you have not done so already.

Save to Binary File

To save the configurat i on to a bina ry file:

1. Choose Save from the Configuration menu. The Save Configuration
dialog box appears.

2. Type the file name and directories to be used to save the configuration.
The file type should be

3. Click an "X" in the Read Only box if you want to make the saved file
read-only.

4. Click Save to save the configuration to the designated file.

NOTE Be sure to save your adapter configuration to a file. This

information is essential when replacing a failed adapter.

*.cfg.

61

Chapter 5 Installation and Configuration

Print Configur ation

To print a copy of the c onfi g urat i on:

1. Choose Print from the Configuration menu.

2. Keep a cop y of config u rati on Worksh eets A and B together with t he
printed copy of your configuration file. They help you understan d your
configuration, replace a failed adapter, or communicate with HP Customer
Support.

Configure Any Other Adapters

To configure another adapter from the HP NetRAID Assistant window:

1. Click the Adapter pull-down list and select the adapter.

2. Clear its configuration by choosing Clear Configuration from the
Configuration menu. Click OK to the warning prompts.

3. Check the Rebuild Rate by choosing Rebuild Rate from the Adapter
menu and reset the rate if necessary.

4. If global hot spares will be assigned, drag the desired Ready physical
drives into the global hot spare pool.

5. Launch the HP NetRAID Ass istan t Wizard by choosing Wizard fr om th e
Configuration menu.

6. Configure the adapter as described in Step G.

7. Save the configuration and print it, as described in Step H.

Initiali ze Logical Dri ves

If you have not done so already, you must initialize your logical drives.

CAUTION Initializing a logical drive destroys all data currently on the

disk modules.

To initialize the logical drives you defined for the adapter in the
HP NetRAID Assistant Wi zard:

1. If you have more than one adapter, click the Adapter pull-down list and
select t he adapter.

2. Select the logical drives to be initialized.

62

Chapter 5 Installation and Configuration

3. Choose Initialize from the Logical Drive menu and click OK.

The Initialize screen appears with separate windows for each logical
dri ve. The bar gra ph for each logica l drive shows the progress of the
initialization.

4. Click the Abort button if you need to stop the initialization of that logical

drive.

5. To rearran ge individual windows, click the Arrange menu and make a

selection.

6. Repeat the initialization process for other logical drives and adapters as
necessary.

Exit HP NetRA ID Assistan t

To exit HP NetRAID Assistant, choose Exit from the Configuration menu.
You have now completed the installation and configuration of the disk array

subsystem hardware. The n ext cha pter di scusses HP NetRAID-1M and 2M
adapter software.

63

6 HP NetRA ID S oftware

Overview

In this chapter, you will complete the next five steps of the configuration:

• In Step I you use the HP Netserver Navigator CD-ROM to prep are the

diskettes needed to install any of the following that are required for your
network operating system (NOS) and method of NOS installation:

◊ HP NetRAID drivers
◊ HP NetRAID NOS-specific utility

• In Step J you install the NOS, if necessary, and the appropriate

HP NetRAID drivers, if they are not installed automatically.

• In Step K , you install the NOS-specific configuration utility you need to

manage your HP NetRAID system.

• In Step L , you run HP NetRAID Express Tools, if n ecessary.

Table 6-1 summarizes the installation of HP NetRAID software.

65

Chapter 6 HP N etRAID Software

Table 6-1. Sum mary of HP NetRAID Software Installati on

NOS Step I Steps J and K Step L

Windows 2000

Windows NT

Automatic

mode of NOS
installation

Manual mode

of NOS
installation

NetWare

Automatic

mode of NOS
installation

Manual mode

of NOS
installation

SCO UnixWare or
SCO OpenServer

First, read NOS Installation

Instructions for any special
instructions.

If no special instructions:

Create diskette with NOS­specific configuration utility.

If special instruct ions: Create
diskette with NOS installation
instructions and anything else
required in special ins truction s.

Create diskette with NOS­specific configuration utility.

Print NOS installation
instructions, or create diskette.

Create diskette with NOS­specific configuration utility.

Create diskette with NOS
installation instructions and
HP NetRA I D drivers.

Create diskette with NOS­specific configuration utility.

Print NOS installation
instructions, or create diskette.

Create diskette with NOS­specific configuration utility.

Create diskette with NOS
installation instructions and
HP NetRA I D drivers.

Create diskette with NOS­specific configuration utility.

Create diskette with NOS
installation instructions and
HP NetRA I D drivers.

NOS-specific configuration
utility is included on dis kette .

Install NOS.
Install NOS-specific

configuration utility.
Install NOS manually.
Install anything

required in special
instructions.

Install NOS-specific
configuration utility.

Install NOS.
Install NOS-specific

configuration utility.

Install NOS manually.
HP NetRA I D drivers
Install NOS-specific

configuration utility.

Install NOS.
Install NOS-specific

configuration utility.

Install NOS manually.
Install HP NetRAID

drivers.
Install NOS-specific

configuration utility.
Install NOS manually.
Install HP NetRAID

drivers.
Install NOS-specific

configuration utility.

Optional

Optional

Optional

Optional

Optional

Optional

Optional

66

Chapter 6 HP N etRAID Software

Step I. Use HP Netserver Navigator CD-ROM to

Prepare Diskettes

In this step, you will use the HP Netserver Navigator CD-ROM to create the
diskettes you need to install the HP NetRAID drivers and the HP NetRAID
configuration utility specific to your NOS. The diskettes that you need to create
may depend upon whether you plan to use Installation Assistan t’s automatic
mode of NOS installation, or whether you plan to install the NOS manually.

Follow the instructions in this step to do the following:

• Veri fy that you have t he most recent ver s ion of the HP Netserver

Navigator CD-ROM, if you have not already done so.

• For either automatic or manual installation of Windows 2000, view the

NOS installation instructions for Windows 2000.

◊ If there are no special instructions for installing Windows 2000,

create diskette(s) containing the NOS-specific configuration utility.

◊ If there are special instructions, create the followin g:

∗ Diskette(s) containing the instructions for installing the NOS and

anything else required in those instructions.

∗ Diskette(s) containing the NOS-specific configuration utility

• For automatic installation of Windows NT or NetWare, create the

following:

◊ Diskette or printed copy of instructions for installing the NOS
◊ Diskette(s) containing the NOS-specific configuration utility

• For manual installation of Windows NT or NetWare, creat e the

following:

◊ Diskette(s) containing the HP NetRAID drivers and instructions for

installing the NOS

◊ Diskette(s) containing the NOS-specific configuration utility

• For SCO UnixWare, or SCO OpenServer, create the diskette(s )

containing the HP NetRAID drivers and instructions for installing the
NOS. The NOS-specific configuration utility will also be copied to the
drivers diskette(s).

67

Chapter 6 HP N etRAID Software

Check Latest Version s

To ensure that you have the latest versions of the software, obtain the current
Status Report for your HP Netserver Navigator CD-ROM. This report describes
any software updates since the CD-ROM was created, and indi cates whether you
need any updates and how to obtain them.

Each version of the CD-ROM has a four-digit Document Number printed on the
disk. Obtain the Status Report for your CD-ROM in one of these ways:

• Internet: Access URL http://netserver.hp.com/netserver/.

Click on the line that corresponds to your document number.

• Internet FTP: Address: ftp://ftp.hp.com/pub/servers

Create Driv ers Diskette an d In struction s

NOTE If you plan to use the automatic mode of NOS installation to

install NetWare or Windows NT, you do not need to make
diskettes of the HP NetRAID drivers. However, you should
copy the instructions for installing the NOS. To do so, refer to
the instructions below to either print a copy directly, or copy
the instructions to diskette to print later.

You can use the HP Netserver Navigator CD-ROM to create the diskette(s)
containing the drivers for your NOS and the instructions for installing them in
either of two ways:

• On a separate PC workstation running Windows 95, 98, NT, or 2000

and havin g a CD-ROM drive and mouse: Refer to "Using a Separate
Workstation to Create Drivers Diskette and Instructions" later in this
chapter.

• On the HP Netserver you are configuring: Refer to "Using the

HP Netserver to Create Drivers Diskette and Instructions" later in this
chapter.

Using a Separate Workstation to Create Drivers Diskette and Instructions

To use a separate PC workstation to create the diskette(s) containing the drivers
for your NOS and the instructions for installing the NOS, do the following:

1. Turn on the workstation and monitor, if they are not already on, and log
on if necessary.

68

Chapter 6 HP N etRAID Software

2. Insert the HP Netserver Navigator CD-ROM into the drive. HP Netserver
Navigator should start automatically if automatic startup is enabled for the
CD-ROM drive. If not, double-click launch32.exe on the CD-ROM to
launch HP Netse rver N avigator. It l ooks differen t from HP N e tserve r
Navigator running on the HP Netserver.

3. On the Netserver Navi g ator screen’s drop-down m e nu of HP Netserve rs,
click the HP Netserver you are configuring. Then click the arrow in the
lower r ight corner of the screen.

4. On the Netserver Navigator menu of NOSs, click the NOS you plan to
install. Then click the arrow in the lower r ight corner of the screen.

5. The Netserver Navigator Main Menu is displayed. Click Guide to
Configure Server.

6. The Guide to Configure Server list the following items:

◊ NOS Installation Instructions
◊ Tested Configurations
◊ Diskette Library

Click NOS Installation Instr ucti ons. Then click the appr op riate icon
either to save the instructions to diskette, or to print the instructions.
Follow the onscreen instructions. When you have fi nished s aving or
printing, click the Close arrow.

7. On the Gui d e to Configure Server s creen, click Diskette Library.

8. On the Diskette Library screen, double-click the NOS drivers for the NOS
you plan to install. Then follow the onscreen instructions to create the
diskette.

9. Go to "Make NOS-specific Configuration Utility Diskette" later in Step I.

Using the HP Netserver to Create Drivers Diskette and Instructions

To use the HP Netserver you are confi guring to create th e d iskette(s ) containing
the drivers for your NOS and the instructions for installing the NOS, do the
following:

1. Turn on the HP Netserver and monitor, if they are not already on, and

insert the HP Netserver Navigator CD-ROM into the drive. Turn off the
HP Netserver power, wait 10 seconds, and turn it back on again.

2. From the HP Navigat or Main Menu, c hoose Configure the Server.

69

Chapter 6 HP N etRAID Software

3. From the Configuration Assistant menu, choose Custom Setup.

4. From the Cus tom Set up menu, choose Drivers Diskette Creation.

5. From the Drivers Diskette Creation window, select the diskette to create,

click the Create Diskette button, and follow the onscreen instructions.

6. When the driver diskette is complete, click Back to return to the Custom

Setup menu.

7. From the Cus tom Set up menu, choose NOS Instal l Inst r uct i ons.

8. On the NOS Install Instructions window, click Save to Disk. Later in

Step I, you will print the Network Operating System Installation
Instructions.

9. Click Done to return to Custom Setup, and click Back to return to the

Main Menu.

Make NOS-specific Configuration Utility Diskette

If you plan to install Win dows NT, Windows 2000, or Novell NetWare, you must
make another diskette containing the NOS-specific configuration utility.

NOTE You can skip this step if you plan to install SCO UnixWare, or

SCO OpenServer. The NOS-specific configuration utility was
already copied to the drivers diskette(s). Go to "Print NOS
Installation Instructions" later in this chapter.

You can use the HP Netserver Navigator CD-ROM to create the diskette(s)
containing the NOS-specific configuration utility in either of two ways:

• On a separate PC workstation running Windows 95, 98, NT, or 2000

and havin g a CD-ROM drive and mouse: Refer to "Using a Separate
Workstation to Create NOS-specific Configuration Utility Diskette " later
in this chapter.

• On the HP Netserver you are configuring: Refer to "Using the

HP Netserver to Create NOS-Specific Configuration Utility Diskette" later
in this chapter.

70

Chapter 6 HP N etRAID Software

Using a Se para te W ork sta tion to C rea te N OS-s pecif ic Conf igurat ion Utility Diskette

1. If you created the NOS drivers diskette(s) on the PC workstation, the
Diskette Library screen is displayed. If you need to display the Diskette
Library, refer to "Using a Separate Workstation to Create Drivers Diskette
and Instructions" earlier in this chapter.

2. On the Diskette Library screen, double-click one of the followin g:

◊ For Windows NT or Windows 2000, select NetRAID Software —

NT/Win2000.

◊ For NetWar e, select NetRAID Softwa r e—NetWare.

Follow the onscreen instructions to create the diskette(s).

3. To exit HP Netserver Navigator, click the Exit icon in the lower left
corn er of the screen.

4. Remove th e HP Netserver Navigator CD-ROM from the drive.

5. Go to "Print NOS Installation Instructions" later in this chapter.

Using the H P Ne tse rve r to C re ate NOS-s pec ific C onfigura tion Utilit y Diskette

To use the HP Netserver to create the diskette(s) needed to install the
NOS-specific utility for Windows NT, Windows 2000, or NetWare:

1. F rom t he HP Na vigat or Main Menu, c hoose Diskette Library.

2. From the Diskette Library, do the following:

◊ For Windows NT or Windows 2000, create the utility diskette by

selecting NetRAID Software—NT/Win2000 in the diskette library.

◊ For NetWar e, select NetRAID Softwa r e—NetWare in the diskette

library.

3. Follow the onscreen instructions to create the NOS-specific diskette.

4. Remove th e HP Netserver Navigator CD-ROM and click Exit to restart
the HP Netserver.

Print NOS I nstallation Instr uctions

If you saved the Network Operating System Installation Instructions or NOS
Installation Instructions to diskette, print them now. In Step J, you will follow

these instructions to load the drivers from the driver diskette.

71

Chapter 6 HP N etRAID Software

Step J. Install NOS and HP NetRA ID Drivers

Install Networ k Operating S ystem (If Necessar y)

If the NOS is not already installed on the HP Netserver, install it according to the
instructions you printed in Step I. If you are using Novell NetWare, also see the
Novell NetWare Installation book.

The NOS can be installed on a non-hot-swap drive, on a hot-swap drive not
under HP NetRAID control or on a logical drive under HP NetRAID control.

Install HP NetRA ID-1M or 2M Driv er

Load the appropria te driver(s) as instructed i n the NOS Installat ion Instruct i ons
that you printed in Step I earlier in this chapter. The driver names are listed in
Table 6-2.

Table 6- 2 . HP NetRAID Drive r s

Network Op erating System HP NetRAID Drivers

Linux megaraid.o
Microsoft Windows 2000 mraid2k.sys
Microsoft Windows NT mraidnt. sys
Novell NetWare 4.2 and 5.x mega4_xx.ham

mega4_xx.ddi
SCO OpenServer amird
SCO UnixWare mega

72

Chapter 6 HP N etRAID Software

Step K. Insta ll NOS- spec ific C onfigurat ion Ut ility

In this step, you install the configuration utility specific to your NOS.

• If you are using any version of Microsoft Windows NT or Windows 2000,

you install the HP NetRAID Assistant utility. This is the Windows NT
and Windows 2000 version of the utility you used to configure your
system in Chapter 5, "Installation and Configuration."

• If you are us ing Novell NetWare, S C O UnixWare, or SCO O p enServer,

you install the HP NetRAID Config utility.

Chapter 10, "Understanding HP NetRAID Utilities," has menu maps of both of
these utilities. For complete information about these utilities, see the HP

NetRA I D Series User Guide in Information Assistant on the HP Netserver
Navigator CD-ROM.

Install the utility as described for the NOS version below.

Microsoft Windows NT 4.0 a nd Windows 2000

1. Select Start from the taskbar.

2. Choose Run from the Start menu.

3. Insert diskette #1, "NetRAID Softwar e —NT/Win2000."

4. Type

5. Follow the on-screen instructions.

NOTE Setup installs the following HP NetRAID-1M or 2M software:

<d>:\setup at t he Open: prompt, wher e <d> is the drive letter of

the diskette drive you are using.

• HP NetRAID Assista nt (nr aid.exe)

• HP Net RAI D Monitor Service (meg aserv.exe)

• HP NetRAID Consi stency Check Scheduler

(mega ctrl. exe)

73

Chapter 6 HP N etRAID Software

Microsoft Windows NT Terminal S erv er Edition

NOTE Windows NT Terminal Server Edition must be operating in

INSTALL mode when you install the NetRAID Software—
NT/Win2000. Otherwise, the administrator may see it as

properly installed, but it may fail for other users.

There are three relevan t commands for the DOS prompt:

• CHANGE USER /INSTALL = set s i t to install m ode.

• CHANGE USER /EXE CUTE = set s i t to execute mode.

• CHANGE USER /QUERY = show th e current mode of

operation.

After the installation, return to the default EXECUTE mode.
This means that clients connected via the network can
conn ect to the server and run Wind ows NT s es sions from it.

1. Select Start from the taskbar.

2. Choose Run from the Start menu.

3. Insert diskette #1, "NetRAID Softwar e —NT/Win2000."

4. Type

5. Follow the on-screen instructions.

NOTE Setup installs the following HP NetRAID-1M or 2M software:

<d>:\setup at t he Open: prompt, wher e <d> is the drive letter of

the diskette drive you are using.

• HP NetRAID Assista nt

• HP NetRAID Monitor Service

• HP NetRAID Consi stency Check Scheduler

74

Chapter 6 HP N etRAID Software

Novell NetWare 4.2 and 5.x

1. Exit to the DOS prompt.

2. Insert the diskette called "NetRAID Software—NetWare."

3. Type

Copy <d1>:\NetRAID\*.* <d2>:\nwserver, where <d1>

is the drive letter for the diskette drive and <d2> is the hard disk where
NetWare is installed. Press Enter.

4. To load the HP NetRAID Config utility, type:

load <d2>:\nwserver\megamgr.nlm and press Enter at the

NetWare console prompt.

SCO OpenServer 5.0.x and UnixWare 7.0

No instructions are necessary. The HP NetRAID Config utility was installed
automatically when you installed the HP NetRAID driver.

Step L. Run HP NetRAID Express Tools

After you have installed your software, you may need to run the HP NetRAID
Express Tools utility. Run HP NetRAID Express Tools if you need to do any of
the following:

• If you are using either Fast/Wide or Ultra/Wide devices in an external

mass s torage enclosure, set the SCSI transfer rate.

◊ The default SCSI transfer rate is Ultra3.
◊ The alternative SCSI transfer rates are Fast, Ultra, and Ultra2.
◊ Change the SCSI transfer rate for the external channel to match the

exter nal devices or external enclosur e.

◊ You do not need to set the SCSI transfer rate if you are using internal

hot-swap mass storage only, since it is Ultra3.

NOTE Instead of using HP NetRAID Express Tools to change the

PCI class code, you can use the Set Class utility in the
"HP NetRAID Software for DOS" utility in th e diskette library
on the HP Netserver Navigator CD-ROM. This is faster if you
have multiple HP NetRAID-1M or 2M adapters because it
avoids multiple restarts of the HP Netserver.

75

Chapter 6 HP N etRAID Software

• If you need to prevent booting from the HP NetRAID subsystem,

disable the HP NetRAID BIOS.

HP NetRAID Express Tools is a configuration and management utility that
resides in a chip on the HP NetRAID board along with the HP NetRAID BIOS
and firmware. For more information about HP NetRAID Express Tools and its
functions, refer to the HP NetRAID Seri es User Guide in Information Assistant.

To Start HP NetRA ID E xpress Tools

1. Start the host HP Netserver and watch for the flashing message:

Option: Experienced users may press <Ctrl> <M> for
HP NetRAID Express Tools now.
Firmware Initializing

2. While this message is flashing, press <Ctrl> <M>. When the system

stops scanning, HP NetRAID Express Tools starts a nd displays th e T ools
Management menu.

To Disable the HP NetRAID BI OS

If you want to prevent the system from booting from an HP NetRAID-1M or 2M
adapter, or from the integrated HP NetRAID controller (if present), you can
disable the HP NetRAID BIOS:

To disable the HP NetRAID BIOS for all adapters in the system, choose Disable
BIOS from the Tools Management menu.

To Change the SCSI Transfer Rate

1. If you have installed one or more HP NetRAID-1M or 2M adapters, select
the adapter controlling the SCSI channel on which Fast/Wide or Ultra
SCSI support is to be enabled:

◊ Choose Select Adapter from the Tools Management menu.
◊ Select the adapter controlling the SCSI channel of interest.

2. Choose Objects from the Tools Management menu.

3. Choose SCSI Channel from the Objects m enu.

4. Select the channel on which the SCSI transfer rate is to be changed.

76

Chapter 6 HP N etRAID Software

5. To change the SCSI transfer rate:

◊ Choose SCSI Transfe r Rate from the SCSI Channel menu. A

submenu appears.

◊ Use the arrow keys to highlight your selection: Fast, Ultra, Ultra2, or

Ultra3. Press Enter.

◊ Choose Yes to confirm your selection.

6. Press Esc to return to the Tools Management menu.

To Exit HP NetRAI D Expr ess Tools

To exit HP NetRAID Express Tools, press Esc repeatedly until the Exit? prompt
is displayed. Choose Yes. Th e n pr e s s any key t o reboot. The new parame ters
become effe c tive after you reboot.

Run Other Utilities, I f Necessary

You may need to enable or disable ports or change settings such as IRQs or MP
specifications. To do so, run the utility appropriate for your system, such as:

◊ Setup Utility
◊ EISA Configuration Utility (ECU)

Refer to your HP Netserver documentation for instructions.

77

7 Preparing for Online Capacity

Expansion

Step M. Prepare for Online Capacity Expansion

The HP NetRAID Online Capacity Expansion feature allows you to add new
storage capacity to drives controlled by an integrated HP NetRAID controller
without rebooting the server.

Online Capacity Expan sion has these restrictions:

• You can use Online Capacity Expansion with any logical drive of RAID

level 0 or 5.

1. Capacity expansion is impossible for RAID 1 logical drives because RAID 1

mirrors one physical drive by one other physical drive.

2. Capacity expansion cannot be done online for logical drives of RAID levels 10

or 50.

• You cannot use Online Capacity Expansion with an array that contains

more than one logical drive. The logical drive must be the only logical
drive in the array.

• Online Capacity Expansion is supported only for the Novell NetWare 4.2

and 5.x an d Micr osoft Windows NT and Windows 2000 operating
systems.

• You cannot use Online Capacity Expansion with SCO OpenServer or

SCO UnixWare.

This chapter explains how to prepare logical drives for future online expansion.
Your NOS documentation and the HP NetRAID Serie s User Guide in
Information Assistant describe how to actually expand capacity.

79

Chapter 7 Preparing for Online Capacity Expansion

Refer to one of the following sections in this chapter:

• See "Preparing for Onlin e Capacity Expansion Under NetWar e 4.2" if you

are using Novell NetWare 4.2.

• See "Preparing for Online Capacity Expansion Under NetWare 5" if you

are using Novell NetWare 5.x.

• See "Preparing for Onlin e Capacit y Expansion under Windows NT" if you

are using M icrosoft Windows NT.

• See "Preparing for Onlin e Capacity Expansion Under Windows 2000" if

you are using Microsoft Windows 2000.

Preparing for Online Capacity Expansion under
NetWare 4.2

About Capacity Expan sion u nder N etWare 4.2

Normally, to add capacity you must shut down the server to reconfigure and then
rest ore data , or you must add th e new stora g e s p ace as a n ew volu me. The O nline
Capacity Expansion feature allows you to expand an existing logical drive
without shutting down the server.

Under NetWare 4.2, use virtual sizing t o prepar e for online capacity expansion.
Virtual sizing is enabled separately on each logical drive. When enabled, the
controller presents to the operating system a logical drive of 144 GB, which is the
default size. Only a part of the 144 GB logical drive exists as actual physical
storage; the remainder is virtual storage. You configure volumes to use only the
actual physical space, while the virtual space allows room for online expansion.

NOTE The 144 GB default size of the logical drive that th e controller

initially presents to the operating system is the minimum size.
The s ize can be increased.

80

Chapter 7 Preparing for Online Capacity Expansion

For example, assume you have one RAID-5 logical drive built from four physical
hard disk drives of 4 GB each. The resul t is 12 GB of act u al storage space. If you
enable virtual sizing for this logical drive, then the operating system will see a
logical drive of 144 GB. Only the first 12 GB are real, 4 GB are used for parit y,
and the last 128 GB are virtua l .

Under NetWare 4.2, you create a 144 GB partition, but within that partition you
only create a logical drive totaling 12 GB or less. Since there is unused partition
space, the ph ysical stor age of 12 GB can be expanded onlin e by add ing another
hard disk drive, but the partition remains at 144 GB. To actually expand capacity
online, refer to the HP NetRAID Series User Guide and your NetWare
documentation.

Precautions

When using the Online Capacity Expansion feature, it is very important that you
do not create volumes that exceed the actual ph ysical capa city. You must add up
the capacities of all volumes that may be using the physical storage space, such as
a DOS volume, SYS volume, Hot Fix Area, and an y user volumes. This is most
important if NetWare 4.2 will be installed on the disk array (rather than a SCSI
disk outside of the HP NetRAID system). During installation, if the total physical
capacity is exceeded d u ring vol u me creation, a NetWare a bend and loss of the
ins talla tion occurs. As long as the physical capaci ty is not exceeded , the
installation will be successful.

Although undesirable, NetWare 4.2 allows you to create volumes into the virtual
space. ( This is because during volu me creat ion, Net Ware 4.2 only looks at the
begin ning of t he volume and if there is real st orage spa ce there, the volu me will
be created.) However, when writing to this volume, you cannot write beyond the
physical limit and write errors will be generated when the physical space is filled.
You need to be careful when creating volumes in a partition containing virtual
space. Use t he HP NetRAID Config module to check t he actual physical capa city
available, a nd be sure the total size of Net Ware volum es does not exceed this
value.

One other useful measure is to set the capacity alarms under NetWare 4.2 so that
warnings will be generated when you approach the limit of a volume.

The Online Capacity Expansion feature cannot be used if a logical drive spans
multiple arrays. Each array can contain only one logical drive. Reconstruction
(for the purposes of adding a dri ve to an array) can be done only on an array
having a single logical drive. It is also important to plan future storage expansion
into your installation. This ensures that you can easily expand capacity without
the need for backup/restore operations or reconfiguration.

81

Chapter 7 Preparing for Online Capacity Expansion

NOTE SFT-3 and mirroring users: Novell’s operatin g system,

which provides system level fault tolerance by mirroring two
systems, is not compatible with the Online Capacity
Expansion feature. SFT-3 mirrors disk storage on a partition
basis rath er than a volu me basis. Beca u s e of t he virt u al space
created within the partition, SFT-3 cannot successfully mir r or
the partitions. This limitation also applies to regular mirroring
(without SFT-3) of volumes. S F T-3 us e rs may add storage
capacity online without bringing the two systems down if
enough drives are added to create a new array and logical
drive on an integrated HP NetRAID controller. Under the
Install m od u le, NetWare 4.2 can then scan for new devices
and detect the new logical drive.

Plannin g for Onlin e Capacity E xpansion under NetWare 4.2

To permit easy capacity expansion of a NetWare 4.2 installation, plan ahead and
consid er your stor age use.

• Since NetWare 4.2 permits only one NetWare partition per logical drive,

make the NetWare partition the size of the virtual logical drive in advance
so that you can expand that volume.

• Under NetWare 4.2, you cannot grow a partition, but you can add

additional segments within an existing partition. The added segments can
be "joi ned" to be part of the same volume, or they can be ma de in to
separate volumes.

• NSS volumes are not supported in NetWare 4.2.

NOTE If NetWare 4.2 must be installed on the disk array, create a

single logical drive with virtual sizing enabled. Create a DOS
partition of 500 MB or less for bootin g. Net W are vol umes can
then be added after the DOS partition on the same logical
drive. The unused space on the partition can be used later for
capacity ex pansion. Be sure to follow the precautions above.

In most installations, the operating system is installed on a SCSI drive connected
outside of the HP NetRAID system. However, NetWare can reside on a disk array
in the HP NetRAID system to achieve redundancy.

82

Chapter 7 Preparing for Online Capacity Expansion

Preparati on St eps for NetWar e 4.2

This section makes the following assumptions:

• You have already configured your HP NetRAID system as discussed in

Chapter 5, "Installation and Configuration." You should have created only
one logical drive per array.

• You have initialized your logical drives.

NOTE It is important to initialize your logical drives. If the drives

have been previously configured under an operati ng system,
there can sometimes be residual partition/format information
which subsequently causes misrepresentation of logical drives
under the NetWare 4.2 In sta ll module.

• You already installed NetWare 4.2 as discussed in Chapter 6,

"HP NetRAID Software."

The fol lowing step s are neces sary to prep are your log ical drive for onl ine
capacity expansion:

I. Enable virtual sizing in HP NetRAID Express Tools

II. Create the NetWare partition in NetWare 4.2

III. Create the NetWare volume in NetWare 4.2

I. Enable Virtua l Sizing

1. Restart the host HP Netserver, and watch for the message:

Option: Experienced users may press <Ctrl> <M> for
HP NetRAID Express Tools now.
Firmware Initializing

2. When the message is displayed, press <Ctrl> <M>. When the system

stops scanning, HP NetRAID Express Tools starts a nd displays th e T ools
Management menu.

3. If there is more than one HP NetRAID-1M or 2M adapter (including any
integrated HP NetRAID controller), do the following to select the
integrated controller or adapter controlling a logical drive you want to
prep are for exp ansion:

a. Choose Adapter from the Tools Management menu.
b. Choose the adapter controlling the logical drive.

83

Chapter 7 Preparing for Online Capacity Expansion

4. Choose Objects from the Tools Management menu.

5. Choose Logical Drive from the Objects m enu.

6. From the Logical Drives menu, choose the logical drive you want to
prep are for exp ansion.

7. Fr om the Logica l Drive m enu for the dri ve you wan t to prepare, choose
Properties.

8. Choose Virtual Sizing.

9. On the Virtual S ize Featu re menu , choose Enable, and confirm your
choice.

10. Press Esc twice to return to the Logical Drive menu.

If you need to enable virtual sizing on another logical drive, choose the
logical drive and repeat steps 6 through 10.

11. If there is more than one HP NetRAID-1M or 2M adapter installed

(including any integrated HP NetRAID controller), press Esc to return to
the Objects menu. Enable virtual sizing on the logical drives of all
adapters as necessary.

12. To exit, press Esc until you see the Exit? box, then choose Yes.

NOTE Clearing a previous configuration does not reset the virtual

sizing setting for a logical drive. Use the Reset to Factory
Defaults option in Express Tools to disable virtual sizing for
all logical drives, or manually change the setting.

II. Create the NetWare Partition

1. Start NetWare 4.2.

2. Type NetWare load install.

3. Select Standard Disk Options.

4. Select Modify Disk Partitions and Hot fix.

5. The Available Devices are displayed. For an initial installation, only Free
Space will be displayed. Select Create NetWare disk partition to create
a NetWare partition on the logical drive (which has virtual sizing
enabled). The partition size will be 144 GB. Press Enter.

84

Chapter 7 Preparing for Online Capacity Expansion

6. Press the F10 key to save the partition. The free space becomes a NetWare

partition. The Available Disk Options menu is displayed.

III. Create the Ne tWa re Volume

How you crea te the Net Ware volume depends on where you installed NetWare.

• For drives that do not contain the NetWare 4.2 operating system, see

"Create Volumes on Drives that do not Contain NetWare 4.2. "

• If NetWare 4.2 was installed on a disk array, see "Create Volumes on

Drives That Contain NetWare 4.2."

Create Volumes on Drives that do not Contain NetWare 4.2

Do the following to create a volume that does not contain the NetWare 4.2
operating system:

1. The Available Disk Options menu is displayed. Select Volume Options.
Press Enter.

2. Press the Inset key or the F3 key to add a volume segment.

3. The avail able free spa ce is displ ayed. Press Enter.

4. Select Make this segment a new volume. Press Enter.

5. Type the volume name. Press Enter.

6. Edit the disk segment size to be the actual physical size of the logical
drive.

7. Press the F10 key to save the changes.

8. The Volume Disk Segment list shows the volume size. Press F10 to save.

9. The volume name and size are displayed. Press Esc to save.

10. Select Yes when asked "Save Volume changes?"

11. Supply the administrator name and login.

12. The changes are displayed. Press Enter to continue.

13. Mount the volume.

85

Chapter 7 Preparing for Online Capacity Expansion

The new volume is now ready for use.
Assume, for example, that the volume is called VOL1 and that its physical

capacity is 12 GB. Its partition is 144 GB. Leave the remaining virtual storage
space (144 GB minus 12 GB) as unused. You can write data up to 12 GB on the
drive.

Create Volumes on Drives that Contain NetWare 4.2

Sometimes it is desirable to have the network operating system reside on a disk
array. The advantage is that the NOS resides on a redundant drive.

NOTE A NetWare 4.2 SYS volume should be limited to 2 GB or to a

smal ler size appr opriat e for your system. Use the balance for a
user volume.

Virtual sizing can be used with a disk arr ay that is used as the boot device and
contains user data. If NetWare 4.2 must reside on the disk array, follow these
steps:

1. Create a DOS partition of 500 MB or less for booting.

2. Create additional NetWare volumes after the DOS partition on the same
logica l drive for data. D o not exceed the physica l space capacity. Create
these volumes as described in "Create Volumes on Drives that do not
Contain NetWare 4.2."

3. The remaining virtual capacity must be left unpartitioned, and will be
available for future partitions as you add disk drives to the array.

NOTE Be su re not to cr eate volumes that ex ceed the act u al physical

capacity. You must add up the capacities of all volumes that
may be using th e p hysical st orage spa ce s u ch as a DOS
volume, SYS volume, Hot Fix Area, and any user volumes.

86

Chapter 7 Preparing for Online Capacity Expansion

Preparing for Online Capacity Expansion under
NetWare 5.x

About Capacity Expan sion u nder N etWare 5.x

Normally, to add capacity you must shut down the server to reconfigure and then
rest ore data , or you must add th e new stora g e s p ace as a n ew volu me. The O nline
Capacity Expansion feature allows you to expand an existing logical drive
without shutting down the server.

The Online Capacity Expansion feature cannot be used if a logical drive spans
multiple arrays. Each array can contain only one logical drive. Reconstruction
(for the purposes of adding a dri ve to an existing array) can only be done on an
array having a single logical drive. It is also important to plan future storage
expansion into your installation. This will ensure that you can easily expand
capacity without backup/restore operations or reconfiguration.

Preparation for online capacity expansion under NetWare 5.x is simply to leave
virtual sizing disabled (the factory default), or to disable it if it has been enabled.
Refer to the HP Ne t R AID Series User Guide and your NetWare 5.x
documentation for information about online capacity expansion.

Plannin g for Onlin e Capacity E xpansion under NetWare 5.x

To permit easy capacity expansion of a NetWare 5.x installation, plan ahead and
consid er your stor age use.

• Under NetWare 5.x, you cannot grow a partition, but you can add

additional partitions within an existing logical drive. The added volumes
can be "joined" to be part of the same volum e , or t hey can be mad e into
separate volumes.

• Under NetWare 5.x, you can expand th e capacity of a logical drive three

times online before you need to go offline to expand its capacity a fourth
time. The fourth expansion involves backing up your data and restoring it.
Then you can expand online three more times before you need to go
offline for the next expansion, and so forth.

• NSS volumes are not supported in NetWare 5.x.

NOTE If NetWare 5.x must be installed on the HP NetRAID disk

array, create a single logical drive with virtual sizing disabled.

87

Chapter 7 Preparing for Online Capacity Expansion

In most installations, the operating system is installed on a SCSI drive connected
outside of the HP NetRAID system. However, NetWare 5.x can reside on a disk
array in the HP NetRAID system to achieve redundancy.

Preparati on St eps for NetWar e 5.x

This section makes the following assumptions:

• You have already configured your HP NetRAID system as discussed in

Chapter 5. You should have created only one logical drive per array.

• You have initialized your logical drives.

NOTE It is important to initialize your logical drives. If the drives

have been previously configured under an operati ng system,
there can sometimes be residual partition/format information
that subsequently causes misrepresentation of logical drives
under NetWare 5.x.

• You already installed NetWare 5.x as discussed in Chapter 6,

"HP NetRAID Software."

The only other requirement to prepare for online capacity expansion of your
logical drive is that virtual sizing is disabled. This is the factory default setting.

• If Virtual Sizing is Disable d (the factory default setting), no other

preparation is necessary.

• If Virtual Sizing is Enabled, disable virtual sizing in HP NetRAID

Express T ools, as described below.

To Disable Virt ual Sizing

NOTE

•Clearing a previous configuration does not reset the virtual

sizing setting for a logical drive.

•Using the Reset to Factory Defaults option in Express Tools

disables virtual sizing for all logical drives.

•To enable virtual sizing for a logical drive, manually change

the setting.

88

Chapter 7 Preparing for Online Capacity Expansion

1. Restart the host HP Netserver, and watch for the message:

Option: Experienced users may press <Ctrl> <M> for
HP NetRAID Express Tools now.
Firmware Initializing

2. When the message is displayed, press <Ctrl> <M>. When the system

stops scanning, HP NetRAID Express Tools starts a nd displays th e T ools
Management menu.

3. If there is more than one HP NetRAID-1M or 2M adapter installed
(including any integrated HP NetRAID controller), do the following to
select the integrated controller or adapter controlling a logical drive you
want to prepare for expansion:

a. Choose Adapter from the Tools Management menu.
b. Choose the adapter controlling the logical drive.

4. Choose Objects from the Tools Management menu.

5. Choose Logical Drive from the Objects m enu.

6. From the Logical Drives menu, choose the logical drive you want to
prep are for exp ansion.

7. Fr om the Logica l Drive m enu for the dri ve you wan t to prepare, choose
Properties.

8. Choose Virtual Sizing.

9. On the Virtual S ize Featu re menu , choose Disable, and confirm your
choice.

10. Press Esc twice to return to the Logical Drive menu.

If you need to d isable vir tual si zing on anot her logical drive, choose t he
logical drive and repeat steps 6 through 10.

11. If there is more than one HP NetRAID-1M or 2M adapter installed

(including any integrated HP NetRAID controller), press Esc to return to
the Objects menu. Disable virtual sizing on the logical drives of all
adapters as necessary.

12. To exit, press Esc until you see the Exit? box, then choose Yes.

89

Chapter 7 Preparing for Online Capacity Expansion

Preparing for Online Capacity Expansion under

Windows NT

About Ca pacity E xpansion un der Win dows NT

Normally, adding capacity requires shutting down the server to reconfigure or
rest ore an existin g volume or t o add th e new storage space as a new volume.
Using the Online Capacity Expansion feature allows you to expand an existing
logical drive without shutting down the server.

NOTE The additional capacity will have a different drive letter than

the original logical drive. If the expanded capacity and the
original capacity must share the same drive letter, you cannot
expand capacity onl ine and you must reboot Wi ndows NT. For
more information about drive letters, see "Capacity
Expansion" in the HP NetRAID Series User Guide in
Information Assistant on the HP Netserver Navigator CD-
ROM.

Under Windows NT, use virtual si zing to prepare for onl ine capacity expansion.
Virtual sizing is enabled separately on each logical drive. When enabled, the
controller presents to the operating system a logical drive of 500-GB. However,
only a part of the 500 GB logical drive exists as actual physical storage. You
configure logical drives to use only the actual physical space while the virtual
space allows room for online expansion.

For example, assume you have one RAID 5 logical drive built from four physical
hard disk drives of 4 GB each; the result is 12 GB of actual storage space. If you
enable virtual sizing for this logical drive, then the operating system will see a
logical drive of 500 GB. The first 12 GB are real, 4 GB is used for parity, and the
last 484 GB are virtual. Sin ce there is un used logical drive space, the physical
storage of 12 GB can be expanded online, but the total logical drive remains at
500 GB. To actually expand capacity online, refer to the HP NetRAID Series
User Guide an d to your Windows NT documentation.

Precautions

When using the Online Capacity Expansion feature, it is important that you do
not crea te volumes that exceed the actual ph ysical capa city. If you attem p t to do
this under Windows NT, the format operation will fail. If you extend an existing
partition into virtual space, this will be detected upon rebooting. In either case, be

90

Chapter 7 Preparing for Online Capacity Expansion

sure to use no more than the actual available physical capacity. Capacity of the
logica l drive can be checked wi th the HP NetRAID Assi stant u nder Wi ndows
NT.

The Online Capacity Expansion feature cannot be used if a logical drive spans
multiple arrays. Each array can contain only one logical drive. Reconstruction
(for the purposes of adding a dri ve to an existing array) can only be done on an
array having a single logical drive. It is also important to plan future storage
expansion into your installation. This will ensure that you can easily expand
capacity without backup/restore operations or reconfiguration.

Preparation Steps for Windows NT

This section makes the following assumptions:

• You have already configured your HP NetRAID system as discussed in

Chapter 5, "Installation and Configuration." You should have created only
one logical drive per array.

For example, you might h ave four physical drives of 4 GB. You might
have configured these four drives as a single RAID 5 logical drive. This
produces a logical drive with 12 GB of real storage capacity, with 4 GB
used for pari ty.

• You have initialized your logical drives.

NOTE It is important to initialize your logical drives because, if the

drives have been previously configured under an operating
system, there may be residual partition/format information
that can subsequently cause misrepresentation of logical drives
under the Windows NT Disk Administrator.

• You have already installed Windows NT as discussed in Chapter 6,

"HP NetRAID Software."

The fol lowing step s are neces sary to prep are your log ical drive for onl ine
capacity expansion:

I. Enable virtual sizing in HP NetRAID Express Tools

II. Start Windows NT and enter the Disk Administrator

III. Partition and format the drive

91

Chapter 7 Preparing for Online Capacity Expansion

I. Enable Virtua l Sizing

NOTE Clearing a previous configuration does not reset the virtual

sizing setting for a logical drive. Use the Reset to Factory
Defaults option in HP NetRAID Express Tools to disable
virtual sizing for all logical drives, or manually change the
setting as described below.

1. Restart the host HP Netserver, and watch for the message:

Option: Experienced users may press <Ctrl> <M> for
HP NetRAID Express Tools now.
Firmware Initializing

2. When the message is d isplayed, p ress <Ctrl> <M>. Wh en the s ystem

stops scanning, HP NetRAID Express Tools starts a nd displays th e T ools
Management menu.

3. If there is more than one HP NetRAID-1M or 2M adapter installed
(including any integrated HP NetRAID controller), do the following to
select the integrated controller or adapter controlling a logical drive you
want to prepare for expansion:

a. Choose Adapter from the Tools Management menu.
b. Choose the adapter controlling the logical drive.

4. Choose Objects from the Tools Management menu.

5. Choose Logical Drive from the Objects m enu.

6. From the Logical Drive menu, choose the logical drive you want to
prep are for exp ansion.

7. Fr om the Logica l Drive m enu for the dri ve you wan t to prepare, choose
Properties.

8. Choose Virtual Sizing.

9. On the Virtual Size menu, choose Enable, an d confirm your choice.

10. Press Esc twice to return to the Logical Drive menu.

If you need to enable virtual sizing on another logical drive, choose the
logical drive and repeat steps 6 through 10.

92