A FreeNAS box with on-board Intel X552 SFP+ ports (Xeon D) and an ESXi 6.7 host with a Mellanox ConnectX-3 (MT27500, Dell Y3KKR) were cabled with two Mellanox MCP2104-X003B passive DACs from 2014. Looping each device to itself brought the ports up, but between the two systems ESXi showed…
One host in a blade chassis went to ESXi 8.0 U3 and came back with no Fibre Channel at all. The datastores are gone, the adapters are not in the storage adapter list, and nothing logs in on the fabric side for those ports. The rest of the cluster is untouched and still sees the same LUNs. blade…
Small vSphere cluster, two 10G uplinks per host into a pair of top-of-rack switches. After the ToR was rebooted for a firmware update, part of the VMs on one host went silent and vMotion failed on both uplinks - yet ESXi never marked anything down and the adapter LEDs stayed lit the whole time…
