HP Hitachi Dynamic Link Manager Software User Manual

Page 19

Contents

Preface

Intended readers .........................................................................................................i

Organization of this manual .......................................................................................i

Related Publications..................................................................................................ii

Conventions: Abbreviations......................................................................................ii

Conventions: Diagrams ............................................................................................xi

Conventions: Fonts and symbols.............................................................................xii

Conventions: KB, MB, GB, and TB ......................................................................xiv

Conventions: Using this program in a non-English Windows system ...................xiv

Manual formats ......................................................................................................xiv

1. Overview of HDLM

1.1 What is HDLM? .........................................................................................................2

1.2 HDLM Features..........................................................................................................4

2. HDLM Functions

2.1 Devices Managed by HDLM......................................................................................8

2.2 System Configuration.................................................................................................9

2.2.1 System Configuration Using an FC-SAN .......................................................9

2.2.2 System Configuration Using an IP-SAN ......................................................11

2.3 LU Configuration .....................................................................................................14

2.4 Program Configuration .............................................................................................16

2.5 Driver Levels of the HDLM and MPIO Drivers ......................................................18

2.6 Distributing a Load Using Load Balancing..............................................................19

2.6.1 Paths to Which Load Balancing Is Applied ..................................................21

2.6.2 Load Balancing Algorithms ..........................................................................23

2.7 Performing Failovers and Failbacks Using Path Switching .....................................26

2.7.1 Automatic Path Switching.............................................................................26

2.7.2 Manual Path Switching .................................................................................29

2.7.3 Path Status Transition....................................................................................30

2.8 Monitoring Intermittent Errors (Functionality When Automatic Failback Is Used) 35

2.8.1 Checking Intermittent Errors.........................................................................35

2.8.2 Setting Up Intermittent Error Monitoring .....................................................35

2.8.3 Intermittent Error Monitoring Actions..........................................................36

2.8.4 When a User Changes the Intermittent Error Information...........................38

2.9 Detecting Errors by Using Path Health Checking ....................................................41

2.10 Dynamic Re-configuration .....................................................................................42

2.10.1 Adding an LU Dynamically ........................................................................42