HP XP20000, XP24000 User Manual

HP StorageWorks XP24000 LUN Expansion User's Guide

Part number: T5214–96005

irst edition: June 2007

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Revision History

Edition

First

Date

June 2007

Description

This edition applies to microcode version 60-01-31-00 /00 or later.

Contents

AboutthisGuide .......................... 7

IntendedAudience...................................... 7

RelatedDocumentation.................................... 7

DocumentConventions.................................... 8

ConventionsforStorageCapacityValues ............................ 8

WindowIllustrations ..................................... 8

HPTechnicalSupport..................................... 8

SubscriptionService ..................................... 9

HPWebsites ........................................ 9

Documentation Feedback . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

1AboutLUSEOperations ..................... 11

OverviewofHPStorageWorksXPLUNExpansion(LUSE) .................... 11

LUSEFunction....................................... 11

LUSEGuidelines...................................... 12

LUSE Operations Using a Path-deﬁnedLDEV........................ 13

2PreparingforLUSEOperations .................. 15

SystemRequirements.................................... 15

PreparingtoUseLUSE ................................... 15

3UsingtheLUSEGUI . . ..................... 17

LUNExpansionWindow .................................. 17

LDEVInformationTree ................................. 17

LDEVDetailTable ................................... 17

LDEVOperationDetail................................. 18

4PerformingLUSEOperations ................... 21

LaunchingLUNExpansion(LUSE) .............................. 21

ViewingConcatenatedParityGroups............................. 21

CreatingaLUSEVolume .................................. 22

CreatingaLUSEVolumefromtheLDEVDetailTable .................... 22

Creating a LUSE Volume from the LDEV Operation Detail (Select an LDEV Combo Box) . . . . . . 24

CreatingaLUSEVolumeUsingtheVolumeCountComboBox ................ 24

ResettinganUnregisteredLUSEVolume............................ 25

ReleasingaLUSEVolume.................................. 27

ChangingLUSECapacities ................................. 28

DisplayingaListofVolumesCombinedintoaLUSEVolume ................... 28

5Troubleshooting . ........................ 31

TroubleshootingLUNExpansion ............................... 31

CallingHPTechnicalSupport ................................ 31

AGlossary,Acronyms,andAbbreviations .............. 33

Index .............................. 35

XP24000 LUN Ex pansion User's Guide

Figures

LUSE Conﬁguration............................... 11

LUSEWindow................................. 17

ConcatenationListDialogBox.......................... 22

Set LUSE ConﬁrmationDialogBox ........................ 23

Reset LUSE ConﬁrmationDialogBox ....................... 26

Release LUSE ConﬁrmationDialogBox ...................... 27

LUSE Detail

DialogBox............................. 29

Tables

1 2

3 4

DocumentConventions .............................. 8

Speciﬁcations and Restrictions on LDEVs Used to ConﬁgureaLUSEVolume....... 12

Speciﬁcatio

LDEVStatusIcons ............................... 18

Glossary,Acronyms,andAbbreviations...................... 33

ns and Restrictions on LDEVs Released from a LUSE Volume . . . . . . . . 13

XP24000 LUN Ex pansion User's Guide

About t his Guide

This user's guide provides instructions for using the LUN Expansion option on the HP storage system. The term storage system in this guide refers to an HP StorageWorks XP24000 Disk Array.

Intended Audience

This document assumes the following:

• The user is fam

the

Remote Web

• The user has a background in data processing and understands RAID storage systems and

their basic functions.

• The user is familiar with the storage system and has read and understands the HP StorageWorks

XP24000 Disk Array Owner's Guide for the storage system.

Document Conventions

Table 1 Document Conventions

Convention

Blue text: Table 1 Cross-reference links and e-mail addresses Blue, u nderlined text:

ttp://www.hp.com

Bold text

Element

Website addresses

• Text emphasis

elements

• UI

Conventions for Storage Capacity Values

HP XP storage systems use the following values to calculate physical storage capacity values (hard disk drives):

• 1 KB (kilobyte) = 1,000 bytes

bytes

• 1 MB (megabyte) = 1,000

• 1 GB (gigabyte) = 1,000

• 1 TB (terabyte) = 1,000

HP XP storage systems use the following values to calculate logical storage capacity values (logical devices):

• 1KB(kilobyte)=1,024bytes

• 1MB(megabyte)= 1,024

• 1 GB (gigabyte) = 1,024

• 1TB (terabyte) =1,024

• 1block =512 bytes

Window Illustrations

The windows shown in this guide were displayed on a Windows computer with the Internet E xplorer browser. The windows may appear different on your computer depending on the operating system and browser being used. Window contents also vary depending on installed program products and the

storage system being managed.

HP Technical Support

For worldwide technical support information, see the HP support website:

ttp://www.hp.com/support

Before contacting HP, collect the following information:

• Product model names and numbers

About this Guide

• Technical support registration number (if applicable)

• Product serial numbers

• Error messages

• Operating system type and revision level

• Detailed questions

Subscription Service

HP recommends that you register your product at the Subscriber’s Choice for Business website:

ttp://www.hp.com/go/e-updates

After registering, you will receive e-mail notiﬁcation of product enhancements, new driver versions, ﬁrmware updates, and other product resources.

HP Websites

For additional information, see the following HP websites:

• h

ttp://www.hp.com

• http://www.hp.com/go/storage

• http://www.hp.com/service_locator

• http://www.hp.com/support/manuals

Documentation Feedback

your feedback.

HP welcome To make comments and suggestions about product documentation, send a message to

storagedocsFeedback@hp.com. All submissions become the property of HP.

XP24000 LUN Expansion User's Guide

About this Guide

1About LUSE Operations

Overview of HP StorageWorks XP LUN Expansion (LUSE)

LUN Expansion (LUSE) operations allow hosts that can use only a limited amount of LUs per ﬁbre i nterface to have access to larger amounts of data by using expanded LUs.

LUSE Function

LUN Expansion (LUSE) is a function for open systems. To use this function, you need the software called Open Volume M anagement.

The LUSE function is applied to open-system logical volumes and enables you to conﬁgure one large logical volume by combining several small LDEVs. The LUSE function allows hosts that can use only a limited number of logical units (LUs) per ﬁbre interface to have access to la rger amou nts of data by

LUs.

using expan

ded

Figure 1 on p

logical dev expanded u logical volume is represented by the smallest LDEV ID (assigned to the top LDEV). The host recognizes the

expanded logical volume as one representative LDEV. As long as the number of LDEVs combined into one large lo gical volume does not exceed the speciﬁed limit (see Table 2 on page 12), you can arbitrarily select any LDEVs as the volumes to combine, regardless of their size (or capacity) or whether or

not they are on the same CU (Control Unit). The LUSE function also allows you to combine several LDEVs and a LUSE volume (combined LDEVs) into one LUSE volume or combine LUSE volumes together into one

Before the host can access each LDEV composing an expanded LU (LUSE volume), you must release the

expanded LU.

Host

age11shows theLUSEconﬁguration. By using the LUSE function, you can combine several

ices (LDEVs) or volumes into one large logical volume. The size of the conﬁgured LDEV can be

to 36 times the size of the original LDEV. The ID of the logical volume deﬁned as the large

LUSE volume.

LUSE (1:00)

The host sees LUSE volumes as one LDEV.

LDEV (1:00)

LDEV (1:01)

LDEV (1:03)

LUSE (1:04)

LDEV (1:04)

LDEV (1:05)

Figure 1 LUSE Conﬁguration

To create an open-systems volume (LU) larger than 2.8 TB, you must use LUSE to combine open-systems volumes so that a LUSE volume larger than 2.8 TB is created.