Chapter 5. Managing Multipath I/O for Devices / 5.7. Tuning the Failover for Specific Host Bus Adapters | ||||
|---|---|---|---|---|
 | 5.6. Configuring Path Failover Policies and Priorities | 5.8. Configuring Multipath I/O for the Root Device |  | |
Chapter 5. Managing Multipath I/O for Devices / 5.7. Tuning the Failover for Specific Host Bus Adapters | ||||
|---|---|---|---|---|
| 5.6. Configuring Path Failover Policies and Priorities | 5.8. Configuring Multipath I/O for the Root Device | | |
When using multipath I/O, you want any host bus adapter (HBA) failure or cable failures to be reported faster than when multipathing is not in use. Configure time-out settings for your HBA to disable failover at the HBA level to allow the failure to propogate up to the multipath I/O layer as fast as possible where the I/O can be redirected to another, healthy path.
To disable the HBA handling of failover, modify the driver’s options in the /etc/modprobe.conf.local file. Refer to the HBA vendor’s documentation for information about how to disable failover settings for your driver.
For example, for the QLogic qla2xxx family of host bus adapters, the following setting is recommended:
options qla2xxx qlport_down_retry=1
