4.2. Configuration File Blacklist
The devnode_blacklist section of the multipath configuration file specifies the devices that will not be used when the system configures multipath devices. Devices that are blacklisted will not be grouped into a multipath device.
By default, all devices are blacklisted, since the following lines appear in the initial configuration file.
devnode_blacklist {
devnode "*"
}
To enable multipathing on all of the devices that are supported by default, comment out those lines, as described in Section 3.1, “Setting Up DM-Multipath”.
After commenting out the universal blacklist, you can specify general device types and individual devices to blacklist. You can blacklist devices according to the following criteria:
By WWID, as described in Section 4.2.1, “Blacklisting by WWID”
By device name, as described in Section 4.2.2, “Blacklisting By Device Name”
By default, a variety of device types are blacklisted, even after you comment out the initial devnode_blacklist section of the configuration file. For information, see Section 4.2.2, “Blacklisting By Device Name”.