HP XP P9500 Storage - Manual (Page 3)

Contents
Preface.................................................................................................xiii
Intended audience...................................................................................................xiv
Product version.......................................................................................................xiv
Release notes..........................................................................................................xiv
Document revision level...........................................................................................xiv
Document organization............................................................................................xiv
Referenced documents.............................................................................................xv
Document conventions.............................................................................................xvi
Convention for storage capacity values.....................................................................xvii
Getting help...........................................................................................................xviii
Comments.............................................................................................................xviii
1 Overview of HDLM................................................................................1-1
What is HDLM?.......................................................................................................1-2
HDLM Features.......................................................................................................1-3
2 HDLM Functions...................................................................................2-1
Devices Managed by HDLM......................................................................................2-3
System Configuration..............................................................................................2-3
System Configuration Using an FC-SAN..............................................................2-3
System Configuration Using an IP-SAN...............................................................2-4
LU Configuration.....................................................................................................2-7
Program Configuration............................................................................................2-8
Position of the HDLM Driver and HDLM Device........................................................2-10
Logical Device Files for HDLM Devices....................................................................2-11
Distributing a Load Using Load Balancing................................................................2-13
Paths To Which Load Balancing Is Applied........................................................2-15
When Using the Thunder 9500V Series, or Hitachi AMS/WMS series..........2-15
When Using the Lightning 9900 Series, Lightning 9900V Series, Hitachi USP,
Universal Storage Platform V/VM, Virtual Storage Platform, Hitachi AMS2000
Series, or Hitachi SMS............................................................................2-16
Load Balancing Algorithms...............................................................................2-16
Performing Failovers and Failbacks Using Path Switching.........................................2-18
Automatic Path Switching................................................................................2-19
Automatic Failovers...............................................................................2-19
iii
Hitachi Dynamic Link Manager User Guide (for Linux(R))