High-Availability Configuration Guide
This document is available in PDF format:
- Deciding whether to use the High-Availability Configuration Guide
This guide describes how to install, configure, and manage Lenovo high-availability (HA) pairs. It includes planning guidance and detailed implementation instructions. - Planning your HA pair configuration
As you plan your HA pair, you must consider recommended best practices, the requirements, and the possible variations. - Requirements for cabling HA pair
If you want to install and cable a new standard or mirrored HA pair, you must have the correct tools and equipment and you must connect the controllers to the disk shelves. HA pairs can be installed in Lenovo rack cabinets. - Configuring an HA pair
Bringing up and configuring a standard or mirrored HA pair for the first time can require enabling HA mode capability and failover, setting options, configuring network connections, and testing the configuration. - Monitoring an HA pair
You can use a variety of commands to monitor the status of the HA pair. If a takeover occurs, you can also determine what caused the takeover. - Halting or rebooting a node without initiating takeover
You can prevent an automatic storage failover takeover when you halt or reboot a node. This ability enables specific maintenance and reconfiguration operations. - Performing a manual takeover
You can perform a takeover manually when maintenance is required on the partner, and in other similar situations. Depending on the state of the partner, the command you use to perform the takeover varies. - Performing a manual giveback
You can perform a normal giveback, a giveback in which you terminate processes on the partner node, or a forced giveback. - Nondisruptive operations with HA pairs
By taking advantage of an HA pair's takeover and giveback operations, you can change hardware components and perform software upgrades in your configuration without disrupting access to the system's storage. - Relocating aggregate ownership within an HA pair
You can change the ownership of aggregates among the nodes in an HA pair without interrupting service from the aggregates. - Appendix: Understanding takeover and giveback
Takeover and giveback are the operations that let you take advantage of the HA configuration to perform nondisruptive operations and avoid service interruptions. Takeover is the process in which a node takes over the storage of its partner. Giveback is the process in which the storage is returned to the partner. - Contacting Support
You can contact Support to obtain help for your issue. - Notices
Lenovo may not offer the products, services, or features discussed in this document in all countries. Consult your local Lenovo representative for information on the products and services currently available in your area.
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