Hi,
We are facing a problem with 7 Hyper-V hosts configured HBA connection with MPIO to a SAN Storage.
All VMs hosted on these HV loose their path whenever a failover occur on the Storage.
We are using Hper-v on Windows 2012 with MPIO. Note that all Paths are show correctly after we physically rebooting the HVs.
I opened a ticket to investigate with the storage vendor, after further troubleshooting they conclude that there are no configuration issue nor on the SAN neither on the Fiber switch. They only suspect that the problem is coming from MPIO software.