initdmp should not ideally cause a failover of cluster.... but I doubt it to resolve the issue in your case.
I would reccomend to plan for outage & do a reconfig reboot ... additionally it will be good if power devices are reconfigured too (powercf) which would be done during the boot time..
since devices were represented, I believe that power devices names were changed which veritas has not picked up.
I also noted above that EMC array is not listing in vxdmpadm listenclosure output... can you confirm if anything you have excluded ?
# vxdmpadm listexclude all
Gaurav