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IBM System Storage DS Storage Manager Copy Services Guide

Book Description

The purpose of this IBM® Redbooks® publication is to provide customers with guidance and recommendations for how and when to use the IBM System Storage® Copy Services premium features. The topics discussed in this publication apply to the IBM System Storage DS® models DS3000, DS4000®, and DS5000 running the firmware v7.70, and IBM System Storage DS Storage Manager v10.70.

Customers in today’s IT world are finding a major need to ensure a good archive of their data and a requirement to create these archives with minimal interruptions. The IBM Midrange System Storage helps to fulfill these requirements by offering three copy services premium features:

  • IBM FlashCopy®

  • VolumeCopy

  • Enhanced Remote Mirroring (ERM)


This publication specifically addresses the copy services premium features and can be used in conjunction with the following IBM DS System Storage books:

  • IBM System Storage DS4000 and Storage Manager V10.30, SG24-7010

  • IBM System Storage DS3000: Introduction and Implementation Guide, SG24-7065

  • IBM System Storage DS3500: Introduction and Implementation Guide, SG24-7914

  • IBM Midrange System Storage Hardware Guide, SG24-7676

  • IBM Midrange System Storage Implementation and Best Practices Guide, SG24-6363

Table of Contents

  1. Front cover
  2. Notices
    1. Trademarks
  3. Preface
    1. The team who wrote this book
    2. Now you can become a published author, too!
    3. Comments welcome
    4. Stay connected to IBM Redbooks
  4. Summary of changes
    1. February 2011, Second Edition
  5. Chapter 1. Introduction to IBM Midrange System Storage Copy Services
    1. 1.1 FlashCopy
    2. 1.2 VolumeCopy
    3. 1.3 Enhanced Remote Mirroring (ERM)
    4. 1.4 Planning for premium features
      1. 1.4.1 Available premium features
      2. 1.4.2 Enabling the premium features
      3. 1.4.3 Disabling premium features
  6. Chapter 2. FlashCopy
    1. 2.1 How it works
      1. 2.1.1 FlashCopy creation prerequisites
      2. 2.1.2 Estimating FlashCopy repository logical drive capacity
      3. 2.1.3 FlashCopy failure policy
      4. 2.1.4 Maximum supported FlashCopies
    2. 2.2 FlashCopy with the GUI wizard: Step-by-step
      1. 2.2.1 Checking the status of the FlashCopy premium feature
      2. 2.2.2 Creating a FlashCopy logical drive
      3. 2.2.3 Mapping a FlashCopy drive to a host
      4. 2.2.4 Viewing the FlashCopy drive status
      5. 2.2.5 Disabling a FlashCopy logical drive
      6. 2.2.6 Re-creating a FlashCopy logical drive
      7. 2.2.7 Resizing a FlashCopy Repository logical drive
      8. 2.2.8 Deleting a FlashCopy drive
    3. 2.3 FlashCopy: Using the CLI
      1. 2.3.1 Creating a FlashCopy logical drive by using the CLI
      2. 2.3.2 The set logicalDrive command
      3. 2.3.3 The disableFlashCopy logicalDrive command
      4. 2.3.4 The recreateFlashCopy logicalDrive command
      5. 2.3.5 The delete logicalDrive command
    4. 2.4 Practical scenario
      1. 2.4.1 Backing up a Windows 2008 Server
  7. Chapter 3. VolumeCopy
    1. 3.1 Introduction to VolumeCopy
      1. 3.1.1 Copying data for greater access
      2. 3.1.2 Creating and managing VolumeCopy copies
      3. 3.1.3 Understanding VolumeCopy
      4. 3.1.4 VolumeCopy and performance considerations
    2. 3.2 VolumeCopy with the GUI wizard: Step-by-step
      1. 3.2.1 Checking the status of the VolumeCopy premium feature
      2. 3.2.2 Creating a VolumeCopy pair
      3. 3.2.3 Viewing VolumeCopy properties
      4. 3.2.4 Using the Copy Manager
      5. 3.2.5 Recopying a logical drive
      6. 3.2.6 Changing VolumeCopy priority
      7. 3.2.7 Setting the read-only attribute for a target logical drive
      8. 3.2.8 Stopping VolumeCopy
      9. 3.2.9 Removing copy pairs
    3. 3.3 VolumeCopy: Using the CLI
      1. 3.3.1 The create volumeCopy command
      2. 3.3.2 The show volumeCopy command
      3. 3.3.3 The stop volumeCopy command
      4. 3.3.4 The set volumeCopy command
      5. 3.3.5 The recopy volumeCopy command
      6. 3.3.6 The remove volumeCopy command
  8. Chapter 4. Enhanced Remote Mirroring (ERM) concepts, planning, and design
    1. 4.1 Introduction to ERM
      1. 4.1.1 ERM terminology
    2. 4.2 Basic functions of ERM
      1. 4.2.1 Metro Mirroring (synchronous mirroring)
      2. 4.2.2 Global Mirroring (asynchronous mirroring with write consistency group)
      3. 4.2.3 Global Copy (asynchronous mirroring without write consistency group)
      4. 4.2.4 Other ERM capabilities and functions
      5. 4.2.5 Requirements
    3. 4.3 Mirror repository logical drives
    4. 4.4 Primary and secondary logical drives
      1. 4.4.1 Logical drive parameters, roles, and maximum number of mirrored pairs
      2. 4.4.2 Host accessibility of secondary logical drive
      3. 4.4.3 Mirrored logical drive controller ownership
      4. 4.4.4 Deleting a mirrored logical drive
      5. 4.4.5 ERM and dynamic functions
      6. 4.4.6 Logical drive role compatibility
      7. 4.4.7 ERM and FlashCopy premium feature
      8. 4.4.8 ERM and VolumeCopy premium feature
      9. 4.4.9 ERM and storage partitioning premium feature
    5. 4.5 Mirror relationship
    6. 4.6 Data replication process
      1. 4.6.1 Data resynchronization process
      2. 4.6.2 Data synchronization priority
    7. 4.7 SAN fabric and Ethernet connectivity
      1. 4.7.1 SAN fabric and SAN zoning configuration
      2. 4.7.2 Ethernet management network configuration for ERM
    8. 4.8 Performance considerations
      1. 4.8.1 ERM in a DR solution
      2. 4.8.2 Planning for ERM as part of a DR solution
      3. 4.8.3 Design recommendations
      4. 4.8.4 Network latency and bandwidth considerations
      5. 4.8.5 Mirroring connection distance and performance
      6. 4.8.6 Application considerations
      7. 4.8.7 Other design considerations
    9. 4.9 Site readiness and installation checklist
      1. 4.9.1 Details of the site readiness and installation checklists
    10. 4.10 The Bandwidth Estimator Tool
  9. Chapter 5. ERM implementation
    1. 5.1 ERM: Step-by-step
      1. 5.1.1 Enabling and activating ERM
      2. 5.1.2 Creating ERM relationships
      3. 5.1.3 Viewing ERM properties and status
      4. 5.1.4 Changing mirror write mode
      5. 5.1.5 Changing mirror synchronization settings
      6. 5.1.6 Suspending and resuming a mirror relationship
      7. 5.1.7 Removing mirror relationships
      8. 5.1.8 Mapping a secondary drive
    2. 5.2 ERM and disaster recovery
      1. 5.2.1 Role reversal concept
      2. 5.2.2 Re-establishing Remote Mirroring after failure recovery
    3. 5.3 ERM solution design
      1. 5.3.1 Intra-site configuration
      2. 5.3.2 Inter-site configuration with redundant fabric
      3. 5.3.3 High-availability inter-site configuration
    4. 5.4 ERM maintenance
      1. 5.4.1 Unsynchronized state indication
      2. 5.4.2 Link interruptions
      3. 5.4.3 Fibre Channel mirror link test function
      4. 5.4.4 Secondary logical drive error
      5. 5.4.5 Primary controller failure
      6. 5.4.6 Primary controller reset
      7. 5.4.7 Secondary controller failure
      8. 5.4.8 Write consistency group and unsynchronized state
    5. 5.5 ERM Configuration guide using the CLI
      1. 5.5.1 Executing a script
      2. 5.5.2 Activate Remote Mirror feature
      3. 5.5.3 Create Remote Mirror
      4. 5.5.4 Set Remote Mirror
      5. 5.5.5 Deactivate Remote Mirror
      6. 5.5.6 Remove Remote Mirror
      7. 5.5.7 Diagnose Remote Mirror
      8. 5.5.8 Suspend Remote Mirror
      9. 5.5.9 Resume Remote Mirror
      10. 5.5.10 Start Remote Mirror Synchronization
      11. 5.5.11 Show Remote Mirror synchronization progress
  10. Appendix A. Additional instructions for FlashCopy logical drives
    1. Operating system resources for additional instructions
    2. Instructions for Windows 2003 or 2008
    3. Instructions for AIX
    4. Instructions for Linux
    5. Instructions for IBM i
  11. Related publications
    1. IBM Redbooks
    2. Other publications
    3. Online resources
    4. Help from IBM
  12. Back cover