DM MPIO device blacklisting not honored in multipath.conf

  • 3029706
  • 18-Oct-2006
  • 27-Apr-2012

Environment

Novell SUSE Linux Enterprise Server 10
Novell SUSE Linux Enterprise Server 9
Novell Open Enterprise Server (Linux based)
multipath-toolspackage version 0.4.5-0.16 or later

Situation

Multipath-tools is configured and a blacklist filter has been configured in /etc/multipath.conf in section devnode_blacklist to exclude devices from being scanned by MPIO.
None of the configured filters has the expected effect - they do not seem to work at all. The filters are ignored even when the multipath configuration is updated on the fly issuing multipath -F or when the entire machine is restarted.

Resolution

Rename the devnode_blacklist section of /etc/multipath.conf toblacklist.

Additional Information

Root cause

Starting with multipath-tools package version 0.4.5-0.16, the configuration for blacklisting has changed: the devnode_blacklist has been renamed toblacklistin later builds of multipath-tools.

Notes

If unsure what version of multipath-tools is currently installed check with

rpm -q multipath-tools

In addition the file /usr/share/doc/packages/multipath-tools/multipath.conf.annotated describes all valid statements and sections for the installed version of the package and always shows the correct syntax for the blacklist statement.

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