Set up EVMS for use with Multipathing

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Environment

SUSE Linux Enterprise Server 10
SUSE Linux Enterprise Server 9

Situation

Have multiple paths to SAN
Want to use multipath devices with EVMS
EVMS administration utilities show multiple devices that are the same physical device

Resolution

This is a known problem. The current workaround is to filter out the devices EVMS will look at. To do this, edit your /etc/evms.conf. There is a section for sysfs_devices. Inside is an exclude parameter. Put in "sd*", this will filter out all the regular disk devices such as sda, sdb, etc. Note that if you have a non-multipathed device, it will also filter out this device. This could be a problem if you have local, non-multipathed evms volumes.

Your resulting sysfs_devices section should look something like this:

sysfs_devices {

include = [ * ]

exclude = [ sd* ]
}

Disclaimer

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