We're in the process of having a new SAN (HDS HUS) installed and configured.
Long story short it's in a state where I'm able to have a bit of a play prior to them coming out to factory reset and commission it.
Our hosts are running ESXi 5.5 U2 and are directly connected via FC to the fiber ports on the HUS.
The FC HBAs are Qlogic 2562 dual port.
I've very quickly used the SNM2 wizard to create a volume and simply assign it to all the FC ports, then I rescanned in vSphere and sure enough there were LUNs which I then formatted as VMFS5 and set about creating a test VM.
The VM works perfectly but on the host under "Events" I'm seeing this about every 15 seconds for each LUN.
Everything looks right in ESXi and some digging suggests this may be to do with datastore heartbeats based on the interval, but there is no mention of that in the Events log.
I've noticed it only starts once there are VM's on the LUN - it doesn't happen simply by rescanning then formatting.
Now I'm sure it's going to be something trivial and that when HDS come out and set the SAN up properly it won't do it, but does anyone have any ideas?