[13764931,13792540] Device Mapper Driver Not Loaded

[Oracle Linux 6.x] The Oracle Linux 6.x operating system does not automatically load the device-mapper driver by default upon restarting the multipathd service, so it may be necessary to load the driver manually before installing Oracle FS Path Manager (FSPM).

The multipath driver must always be loaded before FSPM is installed.

If FSPM is installed prior to loading the device-mapper driver, the following error message appears:

# DM multipath kernel driver not loaded

The device-mapper driver can be loaded in one of two ways:

mpathconf --with_module y

Refer to the mpathconf man pages for an explanation.
Manually load the device-mapper using the following command:
```
# modprobe dm_multipath
```

The first method is recommended.

Note: Review operating system information on multipath services and the device-mapper.

Note: Refer to the man pages of multipath and its components for additional information.