By default, DM Multipath includes support for the most common storage arrays that themselves support DM Multipath. For information on the default configuration values, including supported devices, run either of the following commands.
multipathd show config
If your storage array supports DM Multipath and is not configured by default, you may need to add it to the DM Multipath configuration file,
. For information on the DM Multipath configuration file, see Chapter 4, The DM Multipath Configuration File
Some storage arrays require special handling of I/O errors and path switching. These require separate hardware handler kernel modules.