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”.
4.2.1. Blacklisting By WWID
You can specify individual devices to blacklist by their World-Wide IDentification with a
wwid entry in the blacklist section of the configuration file.
The following example shows the lines in the configuration file that would blacklist a device with a WWID of 26353900f02796769.
blacklist {
wwid 26353900f02796769
}
