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Hitachi 9900 V Series 1.2 Overview of Virtual LVI/LUN 1.2.1 Virtual LVI/LUN Parameters

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PRELIMINARY RELEASE

4 Chapter 1 Overview of LUN Expansion and Virtual LVI/LUN

1.2 Overview of Virtual LVI/LUN 1.2.1 Virtual LVI/LUN Parameters

The Virtual LVI/LUN (VLL) option allows you to configure variable-size volumes, which are

usually smaller than normal (fixed-size) volumes. Virtual LVI/LUN improves data access

performance by reducing logical device contention and host I/O queue times, particularly

when several frequently accessed files are located on the same volume. Virtual LVI/LUN

enables better utilization of the physical storage capacity of the 9900V, and reduces the

amount of administrative effort required to balance I/O workloads.

Virtual LVI/LUN allows you to perform the following types of operations:

 Converting a normal volume into free space (see section 4.2.1),

 Defining and installing a Virtual LVI/LUN (customized) volume (see section 4.2.2),

 Deleting a Virtual LVI/LUN volume (see section 4.2.3), and

 Initializing a Virtual LVI/LUN volume (see section 4.2.4).

Figure 1.2 illustrates the available Virtual LVI/LUN functions:

LDEV

LDEV

LDEV

LDEV

LDEV

Space

LDEV

LDEV

LDEV

LDEV

VLL

VLL

Volume to Space Install VLL

VLL volume

Normal Volume

Volume Initialize

Figure 1.2 Illustration of Virtual LVI/LUN Operations

Contents

Main Page 2002 Hitachi Data Systems Corporation, ALL RIGHTS RESERVED Trademarks Notice of Export Controls Document Revision Level Source Documents for This Revision Referenced Documents Page Preface Microcode Level COMMENTS Thank you! Page Contents List of Figures List of Tables Page Chapter 1 Overview of LUN Expansion and Virtual LVI/LUN 1.1 Overview of LUSE Operations PRELIMINARY RELEASE 2 Chapter 1 Overview of LUN Expansion and Virtual LVI/LUN Table 1.1 LUSE Specifications Note: Virtual LVI/LUN is not applicable to OPEN-L. Table 1.2 VLL LUSE Specifications Page 1.2 Overview of Virtual LVI/LUN 1.2.1 Virtual LVI/LUN Parameters Page Page Page Page 1.2.2 Virtual LVI/LUN Size Calculation 1.2.3 SSID Requirements) Chapter 2 Preparing To Use LUN Expansion or Virtual LVI/LUN 2.1 Set Up the 9900V Subsystem and Remote Console PC(s) 2.2 Launch LUN Expansion or Virtual LVI/LUN Page 2.3 Changing to Modify Mode Page Page Page Page Page 3.2 LUSE Operations 3.2.1 Creating a LUSE Volume 3.2.1.1 Creating a LUSE Volume From the LDEV Operation Detail Page 3.2.1.2 Creating a LUSE Volume From the LDEV Table Page 3.2.2 Releasing a LUSE Volume Page Page Page Page Page Page Page Page 4.2 Virtual LVI/LUN Operations 4.2.1 Converting Logical Volumes to Space Page Page 4.2.2 Creating VLL volumes Page Page Page Page 4.2.3 Deleting a VLL volume 4.2.4 Initializing a Virtual LVI/LUN Volume Page Page Page Page Chapter 5 Troubleshooting 5.1 Troubleshooting PRELIMINARY RELEASE 46 Chapter 5 Troubleshooting Table 5.1 General Error Conditions 5.2 Calling the Hitachi Data Systems Technical Support Center Page Glossary, Acronyms, and Abbreviations