MPIO-capable device management
The Multiple Path I/O (MPIO) feature can be used to define alternate paths to a device for failover purposes.
Failover is a path-management algorithm that improves the reliability and availability of a device because the system automatically detects when one I/O path fails and re-routes I/O through an alternate path. All SCSI SCSD disk drives are automatically configured as MPIO devices and a select number of Fibre Channel disk drives can be configured as MPIO Other disk. Other devices can be supported, providing the device driver is compatible with the MPIO implementation in AIX®.
- mkpath
- Adds a path to a target device.
- rmpath
- Removes a path to a target device.
- chpath
- Changes an attribute or the operational status of a path to a target device.
- lsmpio
- Displays information such as the status, configuration, and statistics about multiPath I/O (MPIO) storage devices.
- lspath
- Displays information about paths to a target device.
If you are performing a BOS installation or a mksysb
installation
on a disk with multiple ports such as Multipath I/O (MPIO), the port must remain active for the
duration of the install.