Not sure if anyone has experienced this issue before but any advice would be greatly appreciated. Our iSCSI NetApp FAS storage controllers were recently updated, now hosts take eternity to boot and are semi unresponsive unless we unpresent the NetApp FAS then they spring to life. They tend to hang during boot on "nfs client loaded successfully" although we are using iSCSI in this instance.
In addition when they are presented after boot to a single host the LUN can be seen and attached but after a fall re-scan the datastores and subsequent VM contents do not return. We are currently engaged with VMware support who have been helpful but we are running out of idea's