5.6. Disabling multipathing by udev property

Procedure

1. Display the udev variables for a device:

   # udevadm info --query=all -n /dev/sdb

2. Disable devices in the /etc/multipath.conf configuration file by using the property parameter. This parameter is a regular expression string that matches against the udev environment variable name for the devices.

   The following example disables multipathing on all devices with the udev property ID_ATA:

   blacklist {
           property "ID_ATA"
   }

3. Validate the /etc/multipath.conf file after modifying the multipath configuration file by running one of the following commands:

   • To display any configuration errors, run:

     # multipath -t > /dev/null

   • To display the new configuration with the changes added, run:

     # multipath -t

4. Reload the /etc/multipath.conf file and reconfigure the multipathd daemon for changes to take effect:

   # service multipathd reload