esx.problem.iorm.badversion
Summary
Host cannot participate in Storage I/O Control (SIOC) on datastore.
Causes
The version number of the SIOC agent on this host is incompatible with number of its counterparts on other hosts connected to this datastore.
Resolutions
Review this VMware KB article for more information.
External
Refer to the VMware Online Documentation for more information on vCenter event messages and possible solutions.