Hi all,
I have also the same warning (sanity check failed...) with HP BL660c and FlexFabric 534FLB (Broadcom) with fresh installed vSphere 6 although I updated the lastest driver 534FLB from HP web site.
But with HP BL660c and Flex Fabirc 554FLB (Emulex) operated normally. I think maybe this bug from HP driver.