Data ONTAP® 8.2

High Availability and MetroCluster Configuration Guide

For 7-Mode

Updated for 8.2.1

Understanding HA pairs
- What an HA pair is
- How HA pairs support nondisruptive operations and fault tolerance
  - How the HA pair improves fault tolerance
    - Single point of failure definition
    - Single point of failure analysis for HA pairs
- Standard HA pair diagram
- Comparison of HA pair types
Understanding mirrored HA pairs
- Advantages of mirrored HA pairs
- Asymmetrically mirrored HA pairs
Understanding takeover and giveback
- When takeovers occur
  - Failover event cause-and-effect table
- How hardware-assisted takeover speeds up takeover
- What happens during takeover
- What happens during giveback
- Background disk firmware update and takeover and giveback
Planning your HA pair configuration
- Best practices for HA pairs
- Setup requirements and restrictions for standard HA pairs
- Setup requirements and restrictions for mirrored HA pairs
- Multipath HA requirement
- Requirements for hardware-assisted takeover
- Possible storage configurations in the HA pairs
- HA pairs and storage system model types
Installing and cabling an HA pair
- System cabinet or equipment rack installation
  - HA pairs in an equipment rack
  - HA pairs in a system cabinet
- Required documentation
- Required tools
- Required equipment
- Preparing your equipment
  - Installing the nodes in equipment racks
  - Installing the nodes in a system cabinet
- Cabling a standard HA pair
- Cabling a mirrored HA pair
- Required connections for using uninterruptible power supplies with standard or mirrored HA pairs
Configuring an HA pair
- Bringing up the HA pair
- Verifying and setting the HA state on the controller modules and chassis
- Enabling HA mode capability and controller failover
- Setting options and parameters
- Configuring network interfaces for HA pairs
- Verifying the HA pair configuration
- Testing takeover and giveback
Managing takeover and giveback
- Monitoring an HA pair in normal mode
- What takeover and giveback are
- Configuring automatic takeover
- Managing an HA pair in takeover mode
  - Determining why takeover occurred
  - Statistics in takeover mode
- Managing emulated nodes
- Performing dump and restore operations for a failed node
- Giveback operations
Reconfiguring an HA pair into two stand-alone systems
- Ensuring uniform disk ownership within disk shelves and loops in the system
- Configuring a node for non-HA (stand-alone) use
- Reconfiguring nodes using disk shelves for stand-alone operation
- Requirements when changing a node using array LUNs to stand-alone
- Reconfiguring nodes using array LUNs for stand-alone operation
Managing DS14mk2 or DS14mk4 disk shelves in an HA pair
- Adding DS14mk2 or DS14mk4 disk shelves to a multipath HA loop
- Upgrading or replacing modules in an HA pair
- About the disk shelf modules
- Restrictions for changing module types
- Best practices for changing module types
- Testing the modules
- Determining path status for your HA pair
- Hot-swapping a module
Nondisruptive operations with HA pairs
- Where to find procedures for nondisruptive operations with HA pairs
- Hot-removing disk shelves in systems running Data ONTAP 8.2.1 or later
Overview of a MetroCluster configuration
- Types of MetroCluster configurations
- How mirroring works in a MetroCluster configuration
- How Data ONTAP works with MetroCluster configurations
- Advantages of stretch MetroCluster configurations
- Configuration variations for stretch MetroCluster configurations
- Advantages of fabric-attached MetroCluster configurations
- Configuration variations for fabric-attached MetroCluster configurations
Implementing stretch MetroCluster configurations with disks
- Planning a stretch MetroCluster configuration using disks
- Cabling a stretch MetroCluster configuration with disks
  - Stretch MetroCluster configuration on single-enclosure HA pairs
  - Assigning disk pools in a stretch MetroCluster configuration
- Managing the default configuration speed of a stretch MetroCluster configuration
  - Changing the default configuration speed of a stretch MetroCluster configuration
  - Resetting a stretch MetroCluster configuration to the default speed
Implementing fabric-attached MetroCluster configurations with disks
- Planning a fabric-attached MetroCluster configuration using disks
- Converting an HA pair to a fabric-attached MetroCluster configuration
- Cabling a fabric-attached MetroCluster configuration with disks
- Setting a preferred primary port in a MetroCluster configuration
- Removing the preferred primary port in a fabric-attached MetroCluster configuration
- Enabling unidirectional port mirroring in a MetroCluster configuration
  - What unidirectional port mirroring is
- Verifying the MetroCluster configuration
Implementing a stretch or fabric-attached MetroCluster configuration with array LUNs
- Planning for a MetroCluster configuration with array LUNs
- Connecting devices in a MetroCluster configuration with array LUNs
- Setting up Data ONTAP after connecting devices in a MetroCluster configuration with array LUNs
- Testing a MetroCluster configuration with array LUNs
Implementing a MetroCluster configuration with both disks and array LUNs
- Types of systems that can use array LUNs in a MetroCluster configuration
- Planning a MetroCluster configuration with disks and array LUNs
- Testing a MetroCluster configuration with disks and array LUNs
Recovering from a disaster by using MetroCluster configurations
- Conditions that constitute a disaster
  - Ways to determine whether a disaster occurred
  - Failures that do not require disaster recovery
- Recovering from a disaster
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