Multipath Error "DM multipath kernel driver not loaded"

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Environment

SUSE Linux Enterprise Server 10
SUSE Linux Enterprise Server 11
SUSE Linux Enterprise Server 12
Novell Open Enterprise Server 2 (OES 2) Linux
Device Mapper Multipath I/O (DM-MPIO)

Situation

When the administrator runs the command 'multipath -l' it returns the following error:

ERROR: DM multipath kernel driver not loaded

Resolution

For SUSE Linux Enterprise Server 10 and 11:

The boot.multipath and multipathd services must be running. To enable these services and check the multipath output, proceed as follows.

Run
chkconfig boot.multipath on
Run
chkconfig multipathd on
Reboot the server, or start the services manually:
- To manually start boot.multipath, run
  /etc/init.d/boot.multipath start
- To manually start multipathd, run
  /etc/init.d/multipathd start

For SUSE Linux Enterprise Server 12:

Run
systemctl enable multipathd.service
Reboot the server, or start the services manually:
- To manually start, run
  systemctl start multipathd.service

Additional steps may be required to fully configure Multipath I/O (MPIO). Please review all documented configuration requirements.
SLES10 MPIO Documentation
SLES11 MPIO Documentation
SLES12 MPIO Documentation

Additional Information

Disclaimer

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