VXFS: enclosure based naming issues

Some times you will see disks appear to have "enclosure based naming" under Veritas when that is not the actual naming scheme in effect. To validate the current naming scheme runng the following:

# vxddladm get namingscheme
NAMING_SCHEME       PERSISTENCE    LOWERCASE      USE_AVID
============================================================
OS Native           No             Yes            Yes

If you are set to OS native this can happen for a couple of reason , the most common I see are the system is attached to a NetApp arrary with ALUA enabled or MPXIO is running in Solaris.

To disable MPXIO in Solaris 10, edit the file /kernel/drv/fp.conf file; so the MPXIO line reads:

mpxio-disable="yes";

After modifying fp.conf reboot the system (I prefer reconfiguration "reboot -- -r") the names of these disks should be back to the ugly long cname variety when check with vxdisk list.