here by the alarm:
Stateless event alarm*
Lost connectivity to storage device mpx.vmhba34:C0:T0:L0. Path vmhba34:C0:T0:L0 is down. Affected datastores: Unknown.
Due to have not unmapped the DVDdrive from the VM before removing the DVD. After hav unampped the drive, I don't see any alarm in vcenter but i receive alarm from several hours now (with 5 minutes)
Same thing here, I was adjusting SAN preferred path, triggering one connectivity loss, since then, no alarm is displayed, but the email continue t get send every 5 minutes.
vCenter Server v 4.0.0 Build 162856
A temporary fix seem to be disabling/enabling the alarm again.